CN116323888A - Consumer product comprising delivery particles with high core to wall ratio - Google Patents

Abstract

The present invention provides consumer products comprising a treatment aid and delivery particles having specific dimensions, specific monomers (eg, multifunctional (meth)acrylate monomers), and specific core:wall polymer weight ratios. The present invention provides methods related to the use and manufacture of such compositions, including methods of treating surfaces such as fabrics.

Description

Consumer products comprising delivery particles having a high core:wall ratio

Technical Field

The present disclosure relates to consumer products comprising a processing aid and a delivery particle having a specific size, a specific monomer (e.g., a multifunctional (meth)acrylate monomer), and a specific core:wall polymer weight ratio. The present invention also relates to methods related to the use and manufacture of such compositions, including methods for treating surfaces such as fabrics.

Background Art

Manufacturers of consumer products want to use benefit agents efficiently and ensure good performance of their products in end use. Specific benefit agents such as fragrances can be encapsulated in core/shell delivery particles. Such particles can be deposited on target surfaces and release the benefit agents under specific triggering conditions, such as rupture by friction or other pressure.

In order to improve the delivery efficiency, a variety of measures can be taken, but each measure often has disadvantages. For example, the particle size can be increased, but large particles tend to leak more than small particles and may not break at the desired time. The relative amount of beneficial agent in the core can be increased relative to the wall, but as the wall becomes relatively thinner, this also tends to result in relatively leaky particles. In addition, brittle capsules may break prematurely during the manufacturing process, for example due to mixing shear applied to the product composition. Additional wall materials can reduce leakage and/or improve capsule strength, but then the particles may not fully break at the desired contact point, and the effective load or delivery efficiency is low. In addition, considering the many known wall materials in the art, there is almost no guidance on what material will be most effective for a given application or particle type.

There is a need for consumer products comprising delivery particles that provide effective beneficial agent delivery, including relatively low leakage characteristics and desirable release characteristics.

Summary of the invention

The present disclosure relates to consumer products comprising a processing aid and a delivery particle having a specific size, monomer, and core:wall ratio.

For example, the present disclosure is directed to a consumer product composition comprising a processing aid and a population of delivery particles, wherein the delivery particles include a core and a polymer wall surrounding the core, wherein the core comprises a benefit agent and a partitioning modifier, wherein the partitioning modifier is present in the core at a level of about 5% to about 55%, based on the weight of the core, wherein the polymer wall comprises a (meth)acrylate polymer, the (meth)acrylate polymer being derived at least in part from one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers, the one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers having at least three free radically polymerizable functional groups, provided that at least one of the free radically polymerizable groups is an acrylate or methacrylate; wherein the core and the polymer wall are present in a weight ratio of about 96:4 to about 99.5:0.5; and wherein the delivery particle is characterized by a volume-weighted particle size of 30 microns to 50 microns.

The present disclosure also relates to a method of treating a surface, preferably a fabric, wherein the method comprises the step of contacting the surface with a consumer product composition according to the present disclosure, optionally in the presence of water.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings herein are illustrative in nature and are not intended to be limiting.

1 is a graph depicting the percent leakage of fragrance delivery particles prepared at 18 and 36 micron diameters according to the present disclosure and compared to 36 micron microcapsules using (meth)acrylate monomers of various functionalities as indicated in the absence of isopropyl myristate.

Figure 2 is a graph depicting the 1 week leakage of 18 micron and 36 micron diameter particles of (meth)acrylate monomers with various functionalities. The particles were measured dispersed in liquid laundry detergent at 35°C and the measurement was taken at 1 week. The control was the same 36 micron capsule without any isopropyl myristate.

3 is a graph depicting the percentage of the amount of free oil obtained from fragrance delivery particles prepared at 18 microns and 36 microns diameters using the indicated wall materials.

4 is a graph depicting the percent leakage by weight of delivery particles prepared at 18 microns and 36 microns diameter using various walls at 40% isopropyl myristate by weight of the core.

DETAILED DESCRIPTION

The present disclosure relates to consumer products comprising a population of delivery particles.Delivery particles (or simply "particles," as used herein) are core/shell particles that comprise a benefit agent in the core, and typically a partitioning modifier.

Surprisingly, it has been discovered that delivery particles with desired leakage characteristics and release characteristics can be formed by carefully selecting a combination of factors - for example, core: wall polymer weight ratio, particle size, and monomers used to form the polymer wall. As a result of the combinations described herein, consumer products can be formulated with unexpectedly high payloads of delivery particles, but which still exhibit reduced leakage of benefit agents and provide the desired odor release characteristics.

The particles, compositions and related methods are described in more detail below.

As used herein, the articles "a" and "an" when used in a claim are understood to refer to one or more of the things protected or described by the claim. As used herein, the terms "comprising," "including," and "containing" are intended to be non-limiting. The compositions of the present disclosure may comprise, consist essentially of, or consist of the components of the present disclosure.

The term "substantially free of" or "substantially free from" may be used herein. This means that the referenced material is very little, not intentionally added to the composition to form part of the composition, or preferably, the referenced material is not present at analytically detectable levels. This refers to compositions in which the referenced material is present only as an impurity in one of the other materials that are intentionally added. If present, the referenced material may be present at a level of less than 1%, or less than 0.1%, or less than 0.01%, or even 0% by weight of the composition.

As used herein, "consumer product" means a baby care, beauty care, fabric and home care, household care, feminine care, and/or healthcare product or device that is intended to be used or consumed in the form in which it is sold and is not intended for subsequent commercial manufacture or modification. Such products include, but are not limited to, diapers, bibs, wipes; products and/or methods involving the treatment of human hair, including bleaching, coloring, dyeing, conditioning, shampooing, styling; deodorants and antiperspirants; personal cleansing; skin care, including the application of creams, lotions and other topically applied products for consumer use; and shaving products, products and/or methods involving the treatment of fabrics, hard surfaces and any other surfaces in the fabric and home care area, including: air care, car care, dishwashing, fabric conditioning (including softening), laundry detergent, laundry and rinse additives and/or care, hard surface cleaning and/or treatment, and other cleaning for consumer or business use; products and/or methods involving toilet paper, facial tissue, tissues and/or paper towels; tampons, feminine hygiene products; adult incontinence products; products and/or methods involving oral care, including toothpaste, tooth gel, tooth cleaning, denture adhesives, tooth whitening; over-the-counter health products, including cough and cold medicines; pest control products; and water purification.

As used herein, the phrase "fabric care composition" includes compositions and formulations designed for treating fabrics. Such compositions include, but are not limited to, laundry cleaning compositions and detergents, fabric softening compositions, fabric enhancing compositions, fabric refreshing compositions, laundry pre-washes, laundry pre-treaters, laundry additives, spray-on products, dry cleaning agents or compositions, laundry rinse additives, washing additives, post-rinse fabric treatment agents, ironing aids, unit dose formulations, delayed delivery formulations, detergents on or included in porous substrates or nonwoven sheets, and other suitable forms that are apparent to those skilled in the art according to the teachings herein. Such compositions can be used as laundry pre-treaters, laundry post-treaters, or can be added during the rinse cycle or wash cycle of a laundry operation.

As used herein, reference to the term "(meth)acrylate" or "(meth)acrylic acid" should be understood to refer to both acrylate and methacrylate versions of the specified monomer, oligomer and/or prepolymer. For example, "allyl (meth)acrylate" is intended to refer to both allyl methacrylate and allyl acrylate, similarly, reference to alkyl (meth)acrylate is intended to refer to both alkyl acrylate and alkyl methacrylate, similarly, reference to poly (meth)acrylate is intended to refer to both polyacrylate and polymethacrylate. Poly(meth)acrylate materials are intended to encompass a wide range of polymeric materials including, for example, polyester poly(meth)acrylates, polyurethane and polyurethane poly(meth)acrylates (especially those prepared by the reaction of hydroxyalkyl (meth)acrylates with polyisocyanates or polyurethane polyisocyanates), methyl cyanoacrylate, ethyl cyanoacrylate, diethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethylene glycol di(meth)acrylate, allyl (meth)acrylate, glycidyl (meth)acrylate, (meth)acrylate functional siloxanes, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, The invention also includes bisphenol A di(meth)acrylate, bisphenol A di(meth)acrylate, diglycerol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,3-butylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethoxylated bisphenol A di(meth)acrylate, bisphenol A di(meth)acrylate, diglycerol di(meth)acrylate, tetraethylene glycol dichloroacrylate, 1,3-butylene glycol di(meth)acrylate, neopentyl di(meth)acrylate, trimethylolpropane tri(meth)acrylate and various multifunctional (meth)acrylates. Monofunctional (meth)acrylates, i.e. those containing only one (meth)acrylate group, can also be used advantageously. Typical mono(meth)acrylates include 2-ethylhexyl(meth)acrylate, 2-hydroxyethyl(meth)acrylate, cyanoethyl(meth)acrylate, 2-hydroxypropyl(meth)acrylate, p-dimethylaminoethyl(meth)acrylate, lauryl(meth)acrylate, cyclohexyl(meth)acrylate, tetrahydrofurfuryl(meth)acrylate, benzyl(meth)acrylate chloride, aminoalkyl(meth)acrylate, various alkyl(meth)acrylates, and glycidyl(meth)acrylate. Mixtures of (meth)acrylates or their derivatives, as well as combinations of one or more (meth)acrylate monomers, oligomers, and/or prepolymers or their derivatives with other copolymerizable monomers (including acrylonitrile and methacrylonitrile) may also be used.

As used herein, "delivery particle," "particle," "encapsulate," "microcapsule," and "capsule" are used interchangeably unless otherwise indicated.

For ease of reference in this specification and claims, the term "monomer" as used herein with respect to the wall polymer is to be understood as a monomer, but also includes oligomers or monomers, and prepolymers formed from the specified monomer.

Unless otherwise indicated, all component or composition levels are in terms of the active portion of that component or composition and are exclusive of impurities, for example, residual solvents or by-products, that may be present in commercially available sources of such component or composition.

Unless otherwise indicated, all temperatures herein are in degrees Celsius (° C.) Unless otherwise indicated, all measurements herein are made at 20° C. and atmospheric pressure.

In all embodiments of the present disclosure, unless otherwise specifically stated, all percentages are by weight of the total composition. Unless otherwise specifically stated, all ratios are by weight.

It should be understood that each maximum numerical limit given throughout this specification includes each lower numerical limit, as if such lower numerical limits were expressly written herein. Each minimum numerical limit given throughout this specification will include each higher numerical limit, as if such higher numerical limits were expressly written herein. Each numerical range given throughout this specification will include each narrower numerical range falling within such wider numerical range, as if such narrower numerical ranges were all expressly written herein.

Consumer product compositions

The present disclosure relates to consumer product compositions (or simply "compositions" as used herein). The compositions of the present disclosure may include a population of delivery particles and a processing aid, each described in more detail below.

The consumer product compositions of the present disclosure can be used for baby care products, beauty care products, fabric care products, home care products, family care products, feminine care products, and/or health care applications. The consumer product compositions can be used to treat surfaces, such as fabrics, hair, or skin. The consumer product compositions can be intended to be used or consumed in their sales form. The consumer product compositions may not be intended for subsequent commercial manufacturing or modification.

The consumer product composition can be a fabric care composition, a hard surface cleaner composition, a dish care composition, a hair care composition (such as a shampoo or conditioner), a body cleansing composition, or mixtures thereof.

The consumer product composition may be a fabric care composition, such as a laundry detergent composition (including heavy duty liquid detergents or unit dose products), a fabric conditioning composition (including liquid fabric softening and/or enhancing compositions), a laundry additive, a fabric pretreatment composition (including sprays, pourable liquids or mists), a fabric refresher composition (including sprays), or mixtures thereof.

The composition may be a beauty care composition, such as a hair treatment product (including a shampoo and/or a conditioner), a skin care product (including a cream, lotion or other topical product for consumer use), a shave care product (including a shave lotion, foam, or a pre-shave or post-shave treatment), a personal cleansing product (including a liquid body wash, a liquid hand soap, and/or a bar soap), a deodorant and/or an antiperspirant, or mixtures thereof.

The composition may be a home care composition, such as air care, car care, dishwashing, hard surface cleaning and/or treatment, and other cleaning for consumer or institutional use.

The consumer product composition can be in the form of a liquid composition, a granular composition, a hydrocolloid, a single compartment pouch, a multi-compartment pouch, a dissolvable sheet, a lozenge or bead, a fiber product, a tablet, a stick, a strip, a wafer, a foam/mousse, a nonwoven sheet, or mixtures thereof.

The composition may be in liquid form. The liquid composition may contain from about 30%, or from about 40%, or from about 50% to about 99%, or to about 95%, or to about 90%, or to about 75%, or to about 70%, or to about 60% water by weight of the composition. The liquid composition may be a liquid laundry detergent, a liquid fabric conditioner, a liquid dishwashing detergent, a shampoo, a hair conditioner, or a mixture thereof.

The composition may be in solid form. The solid composition may be a powdered or granular composition. Such compositions may be agglomerated or spray dried. Such compositions may include a plurality of particles or microparticles, at least some of which include different compositions. The composition may be a powdered or granular cleaning composition, which may contain a bleaching agent. The composition may be in the form of beads or pastilles, which may be made from a liquid melt. The composition may be an extruded product.

The composition can be in the form of a combined dose product such as a tablet, a pouch, a sheet or a fiber product. Such pouches generally include a water-soluble film, such as a polyvinyl alcohol water-soluble film, which at least partially encapsulates the composition. Suitable films are available from MonoSol, LLC (Indiana, USA). The composition can be encapsulated in a single compartment pouch or a multi-compartment pouch. The multi-compartment pouch can have at least two, at least three or at least four compartments. The multi-compartment pouch can include compartments arranged side by side and/or stacked. The composition contained in the pouch or its compartment can be a liquid, a solid (such as a powder), or a combination thereof. The bagged composition can have a relatively small amount of water, for example, less than about 20%, or less than about 15%, or less than about 12%, or less than about 10%, or less than about 8% water by weight of the detergent composition.

The composition may be in the form of a spray and may be dispensed from a bottle, for example, via a trigger spray and/or an aerosol container with a valve.

The composition may have a viscosity of 1 to 1500 centipoise (1 to 1500 mPa*s), 100 to 1000 centipoise (100 to 1000 mPa*s), or 200 to 500 centipoise (200 to 500 mPa*s) at 20 s ⁻¹ and 21° C.

Other components and/or features of the compositions, such as delivery particles and consumer product adjunct materials, are discussed in more detail below.

Delivery particle population

The compositions and products of the present disclosure comprise a population of delivery particles.

The composition may include from about 0.05% to about 20%, or from about 0.05% to about 10%, or from about 0.1% to about 5%, or from about 0.2% to about 2% delivery particles by weight of the composition. The composition may include a sufficient amount of delivery particles to provide the composition with from about 0.05% to about 10%, or from about 0.1% to about 5%, or from about 0.1% to about 2% fragrance by weight of the composition. When the amount or weight percentage of delivery particles is discussed herein, it means the sum of the shell material and the core material.

The delivery particle typically comprises a core and a shell, wherein the shell encapsulates the core. As described in more detail below, the core may comprise a benefit agent and optionally a partitioning modifier, and the shell may comprise certain polymers, ie, acrylate materials.

The delivery particles may have a volume weighted median particle size of about 30 microns to about 50 microns, preferably about 30 microns to about 40 microns.

The delivery particle population can have a relatively broad distribution of particle sizes. As described above, it is believed that a broad distribution helps the composition be more effective on various types of fabrics or garments. The delivery particle population can be characterized by a breadth index, which is a way to characterize the size distribution.

The breadth index is calculated by determining the particle size that accounts for more than 90% of the cumulative particle volume (90% size), the particle size that accounts for more than 5% of the cumulative particle volume (5% size), and the median volume-weighted particle size (50% size; where 50% of the particle volume is above and below this size). These values can be used in the following equation to determine the breadth index of the delivery particle population.

Width Index = (90% Size – 5% Size) / 50% Size

The delivery particle population of the present disclosure may be characterized by a breadth index of at least 1.0, preferably at least 1.1, and more preferably at least 1.2. The delivery particle population may be characterized by a breadth index of about 1.0 to about 2.0, or about 1.0 to about 1.8, or about 1.1 to about 1.6, or about 1.1 to about 1.5, or about 1.2 to about 1.5, or about 1.2 to about 1.4. Relatively high breadth index values indicate a relatively broad particle size distribution.

The population of delivery particles may be characterized by one or more of the following: (i) a 5th percentile volume-weighted particle size of about 1 micron to about 15 microns; (ii) a 50th percentile (median) volume-weighted particle size of about 30 microns to about 50 microns; (iii) a 90th percentile volume-weighted particle size of about 40 microns to about 80 microns; or (iv) a combination thereof.

The delivery particle can be characterized by bursting strength. Bursting strength is measured according to the program provided in the test method section below. The delivery particle population can be characterized by an average bursting strength of about 0.2MPa to about 30MPa, or about 0.4MPa to about 10MPa, or about 0.6MPa to about 5MPa, or even about 0.8MPa to about 4MPa (wherein the median/ _d50 size of the population is measured across several capsules for bursting strength). The delivery particle population can be characterized by an average bursting strength of about 0.2MPa to about 10MPa, or about 0.5MPa to about 8MPa, or about 0.5MPa to about 6MPa, or about 0.5MPa to about 5MPa, or about 0.7MPa to about 4MPa, or about 1MPa to about 3MPa. The delivery particle population can be characterized by an average bursting strength of about 0.2MPa to about 10MPa, preferably about 0.5MPa to about 8MPa, more preferably about 0.5MPa to about 5MPa. It is believed that delivery particles having an average burst strength at _d50 at these levels will perform well at one or more contact points that are typical for surfaces such as fabrics treated with compositions according to the present disclosure.

As described in more detail below, the delivery particles of the present disclosure comprise a core and a shell surrounding the core. It has been surprisingly found that, among other things, a specific ratio of core material to shell material is selected to produce a population of delivery particles that exhibits improved performance. Without wishing to be bound by theory, it is believed that the formulation of delivery particles having a relatively high core to wall ratio provides a population having the desired burst strength distribution described in the present disclosure. In addition, delivery particles having a high core: wall ratio can more effectively deliver beneficial agents, requiring less wall material to deliver the same amount of beneficial agent. In addition, because the delivery particles have a relatively high beneficial agent loading, a particular composition may require less delivery particles, thereby saving cost and/or saving formulation space.

The delivery particles of the present disclosure can be characterized by a core to polymer wall weight ratio (also referred to as a "core: polymer wall ratio," "core-wall ratio," "core: wall ratio," or even a "C:W ratio," etc., as used herein). A relatively high core: wall ratio is generally preferred to increase the delivery efficiency or relative payload of the particle. However, if the ratio is too high, the capsule may become too brittle or leaky and provide suboptimal performance.

As used herein, the core: polymer wall ratio is understood to be calculated based on the weight of the reacted wall-forming materials and initiators that constitute the polymer wall, and for calculation purposes, entrapped non-structural materials, such as entrapped emulsifiers, are excluded from the calculation. The calculation is based on the amount of the starting feed (i.e., feed monomers and initiators). The calculation of the sample core: wall polymer ratio is illustrated in Example 1 below. If the amount of the starting feed is not readily available, the core: wall ratio is determined according to the analytical determination procedure for the core: wall ratio provided in the test method section.

The delivery particles (preferably a population of delivery particles) may be characterized by a core:polymer wall weight ratio of at least about 96:4, more preferably at least about 97:3, even more preferably at least about 98:2, even more preferably at least about 99: 1. The delivery particles (preferably a population of delivery particles) may be characterized by a core to polymer wall weight ratio of about 96:4 to about 99.5:0.5, preferably about 96:4 to about 99: 1, more preferably about 97:3 to about 99: 1, even more preferably about 98:2 to about 99: 1. The core to polymer wall weight ratio may be about 96:4 to about 99: 1, or about 96:4 to about 98:2, or about 97:3 to about 98:2.

Components and methods associated with the delivery particles of the present disclosure are described in more detail below.

a. Polymer wall

The delivery particles of the present disclosure include a polymer wall surrounding a core. Note that as used herein, the terms "polymer wall," "wall," and "shell" are used interchangeably unless otherwise specified.

The polymer wall comprises a polymer material, in particular a (meth)acrylate polymer. The (meth)acrylate polymer is derived at least in part from one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers.

The polymer wall may comprise from about 5% to about 100%, preferably from about 40% to about 100%, more preferably from about 50% to about 100%, more preferably from about 75% to about 100%, more preferably from about 85% to about 100%, more preferably from about 90% to about 100%, even more preferably from about 95% to about 100% of (meth)acrylate polymer by weight of the polymer wall. The polymer wall may comprise from about 5% to about 100%, preferably from about 40% to about 100%, more preferably from about 50% to about 100%, more preferably from about 75% to about 100%, more preferably from about 85% to about 100%, more preferably from about 90% to about 100%, even more preferably from about 95% to about 100% of oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers by weight of the polymer wall. The (meth)acrylate polymer may contain from about 5% to about 100%, preferably from about 40% to about 100%, more preferably from about 50% to about 100%, more preferably from about 75% to about 100%, more preferably from about 85% to about 100%, more preferably from about 90% to about 100%, even more preferably from about 95% to about 100%, of an oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer, based on the weight of the (meth)acrylate polymer.

The one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers contain at least three, preferably at least four, preferably at least five, preferably at least six, more preferably exactly six free radically polymerizable functional groups, provided that at least one of the free radically polymerizable functional groups is an acrylate or methacrylate group.

The one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers may contain three to six, preferably four to six, more preferably five to six, and most preferably six free radically polymerizable functional groups. It is believed that monomers containing a relatively large number of free radically polymerizable groups produce, for example, delivery particles having denser walls and having preferred properties such as less leakage compared to walls formed from monomers having fewer free radically polymerizable groups.

The free radical polymerizable functional groups may be independently selected from the group consisting of: acrylate, methacrylate, styrene, allyl, vinyl, glycidyl, ether, epoxy, carboxyl or hydroxyl, provided that at least one of the free radical polymerizable functional groups is an acrylate or methacrylate. Preferably, at least two, or at least three, or at least four, or at least five, or at least six of the free radical polymerizable functional groups are acrylate or methacrylate groups. Preferably, the free radical polymerizable functional groups are each independently selected from the group consisting of: acrylate and methacrylate. It is believed that these functional groups result in delivery particles having preferred properties, such as less leakage at high core: wall ratios compared to other functional groups.

The oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer may include a multifunctional aromatic urethane acrylate. Preferably, the oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer includes a hexafunctional aromatic urethane acrylate.

Additionally or alternatively, the oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer may comprise a multifunctional aliphatic urethane acrylate.

The (meth)acrylate polymer of the polymer wall may be derived from at least two different multifunctional (meth)acrylate monomers, such as a first multifunctional (meth)acrylate monomer and a second multifunctional (meth)acrylate monomer, each of which may preferably be oil-soluble or oil-dispersible. The first multifunctional (meth)acrylate monomer may contain a different number of free-radically polymerizable functional groups compared to the second multifunctional (meth)acrylate monomer. For example, the first multifunctional (meth)acrylate monomer may contain six free-radically polymerizable functional groups (e.g., hexafunctional), and the second multifunctional (meth)acrylate monomer may contain less than six free-radically polymerizable functional groups, such as a number selected from three (e.g., trifunctional), four (e.g., tetrafunctional), or five (e.g., pentafunctional), preferably five. The first multifunctional (meth)acrylate monomer and the second multifunctional (meth)acrylate monomer may contain the same number of free-radically polymerizable functional groups, such as six (e.g., both monomers are hexafunctional), but the respective monomers are characterized by different structures or chemical properties.

The oil-soluble or oil-dispersible (meth)acrylate may further include a monomer selected from amine methacrylate, acidic methacrylate, or a combination thereof.

The (meth)acrylate polymer of the polymer wall may be a reaction product derived from an oil-soluble or oil-dispersible multifunctional (meth)acrylate, a second monomer, and a third monomer. Preferably, the second monomer comprises a basic (meth)acrylate monomer, and the third monomer comprises an acidic (meth)acrylate monomer. The basic (meth)acrylate monomer or oligomer may be present in less than 2% by weight of the wall polymer. The acidic (meth)acrylate monomer or oligomer may be present in less than 2% by weight of the wall polymer.

The basic (meth)acrylate monomer and/or its oligomer or prepolymer may contain one or more of amine-modified methacrylate, amine-modified acrylate, monomers such as monoacrylate amine or diacrylate amine, monomethacrylate amine or dimethacrylate amine, amine-modified polyether acrylate, amine-modified polyether methacrylate, aminoalkyl acrylate or aminoalkyl methacrylate. The amine may be a primary amine, a secondary amine or a tertiary amine. Preferably, the alkyl portion of the basic (meth)acrylate monomer is C1 to C12.

Amine (meth)acrylates suitable for use in the particles of the present disclosure may include aminoalkyl acrylates or aminoalkyl methacrylates, including, for example, but not limited to, ethylaminoethyl acrylate, ethylaminoethyl methacrylate, aminoethyl acrylate, aminoethyl methacrylate, tert-butylethylamino acrylate, tert-butylethylamino methacrylate, tert-butylaminoethyl acrylate, tert-butylaminoethyl methacrylate, diethylamino acrylate, diethylamino methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate, and dimethylaminoethyl methacrylate. Preferably, the amine (meth)acrylate is aminoethyl acrylate or aminoethyl methacrylate, or tert-butylaminoethyl methacrylate.

For example, the acidic (meth)acrylate may include one or more of carboxyl-substituted acrylates or methacrylates, preferably carboxyl-substituted alkyl acrylates or methacrylates, such as carboxyl alkyl acrylates, carboxyl alkyl methacrylates, carboxyl aryl acrylates, carboxyl aryl methacrylates, and preferably, the alkyl portion is a linear or branched C1 to C10. The carboxyl portion may be bonded to any carbon of the C1 to C10 alkyl portion, preferably the terminal carbon. Carboxyl-substituted aryl acrylates or methacrylates, or even (meth)acryloyloxyphenylalkylcarboxylic acids may also be used. The alkyl portion of the (meth)acryloyloxyphenylalkylcarboxylic acid may be C1 to C10.

Carboxyl (meth)acrylates suitable for use in the particles of the present disclosure may include 2-carboxyethyl acrylate, 2-carboxyethyl methacrylate, 2-carboxypropyl acrylate, 2-carboxypropyl methacrylate, carboxyoctyl acrylate, carboxyoctyl methacrylate. Carboxyl-substituted aryl acrylates or aryl methacrylates may include 2-acryloxybenzoic acid, 3-acryloxybenzoic acid, 4-acryloxybenzoic acid, 2-methacryloxybenzoic acid, 3-methacryloxybenzoic acid, and 4-methacryloxybenzoic acid. For example, (meth)acryloxyphenylalkylcarboxylic acids may include, but are not limited to, 4-acryloxyphenylacetic acid or 4-methacryloxyphenylacetic acid.

In addition to oil-soluble or oil-dispersible multifunctional (meth) acrylate monomers or oligomers, the (meth) acrylate polymer of the polymer wall can also be derived from water-soluble or water-dispersible monofunctional or multifunctional (meth) acrylate monomers or oligomers, which may contain hydrophilic functional groups. Water-soluble or water-dispersible monofunctional or multifunctional (meth) acrylate monomers or oligomers can preferably be selected from the group consisting of: amine (meth) acrylates, acidic (meth) acrylates, polyethylene glycol di(meth) acrylates, ethoxylated monofunctional (meth) acrylates, ethoxylated multifunctional (meth) acrylates, other (meth) acrylate monomers, other (meth) acrylate oligomers and mixtures thereof. When preparing delivery particles, an emulsifier can be optionally included, preferably in the aqueous phase. The emulsifier can be a polymer emulsifier. The emulsifier can help to further stabilize the emulsion. In the formation of the polymer wall of the delivery particles, the polymer emulsifier can be trapped in the polymer wall material. The inclusion of an emulsifier in the polymer wall can be used to advantageously alter the properties of the polymer wall, affecting attributes such as flexibility, leakage, strength and other properties. Thus, the polymer wall of the delivery particle may also include a polymer emulsifier entrapped in the polymer wall, preferably, wherein the polymer emulsifier comprises polyvinyl alcohol. However, as described above, when determining the core: wall polymer weight ratio, the entrapped polymer emulsifier is not included.

Based on the weight of the wall material, the beneficial agent delivery particles may contain about 0.5% to about 40%, preferably about 0.5% to about 20%, more preferably 0.8% to 5% of an emulsifier. Preferably, the emulsifier is selected from the group consisting of polyvinyl alcohol, carboxylated or partially hydrolyzed polyvinyl alcohol, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, salts or esters of stearic acid, lecithin, organic sulfonic acid, 2-acrylamido-2-alkylsulfonic acid, styrenesulfonic acid, polyvinylpyrrolidone, copolymers of N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid; copolymers of acrylic acid and methacrylic acid, and water-soluble surfactant polymers that reduce the surface tension of water. The emulsifier preferably comprises polyvinyl alcohol, and the polyvinyl alcohol preferably has a degree of hydrolysis of about 55% to about 99%, preferably about 75% to about 95%, more preferably about 85% to about 90%, and most preferably about 87% to about 89%. The polyvinyl alcohol may have a viscosity of about 40 cps to about 80 cps, preferably about 45 cps to about 72 cps, more preferably about 45 cps to about 60 cps, and most preferably 45 cps to 55 cps in a 4% polyvinyl alcohol aqueous solution at 20°C; the viscosity of the polymer is determined by measuring a fresh solution using a Brookfield LV type viscometer with a UL adapter as described in British Standard EN ISO 15023-2:2006 Annex E Brookfield test method. The polyvinyl alcohol may have a degree of polymerization of about 1500 to about 2500, preferably about 1600 to about 2200, more preferably about 1600 to about 1900, and most preferably about 1600 to about 1800. The polyvinyl alcohol may have a weight average molecular weight of about 130,000 Daltons to about 204,000 Daltons, preferably about 146,000 Daltons to about 186,000 Daltons, more preferably about 146,000 Daltons to about 160,000 Daltons, and most preferably about 146,000 Daltons to about 155,000 Daltons, and/or a number average molecular weight of about 65,000 Daltons to about 110,000 Daltons, preferably about 70,000 Daltons to about 101,000 Daltons, more preferably about 70,000 Daltons to about 90,000 Daltons, and most preferably about 70,000 Daltons to about 80,000 Daltons.

The (meth)acrylate polymer of the polymer wall may further be derived at least in part from at least one free radical initiator, preferably at least two free radical initiators. The at least one free radical initiator may preferably include a water-soluble or water-dispersible free radical initiator. The one or more free radical initiators may provide a source of free radicals upon activation.

Without wishing to be bound by theory, it is believed that selecting an appropriate amount of initiator relative to the total wall material (and/or wall monomers/oligomers) can produce improved capsules. For example, it is believed that too low an initiator level may result in poor polymer wall formation; too high a level may result in an encapsulate wall having a relatively low level of structural monomers. In either case, the resulting capsules may be relatively leaky and/or weak. It is further believed that optimization of encapsulate wall formation, aided by appropriate selection of relative initiator levels, is particularly important for capsules having a relatively high core:wall ratio, given that the amount of wall material is relatively low.

Thus, the amount of initiator present may be from about 2% to about 50%, preferably from about 5% to about 40%, more preferably from about 10% to about 40%, even more preferably from about 15% to about 40%, even more preferably from about 20% to about 35%, or more preferably from about 20% to about 30% by weight of the polymer wall (e.g., wall monomer plus initiator, excluding entrapped polymer emulsifier, as described herein for the core: wall ratio). It is believed that relatively high amounts of initiator within the disclosed range may result in improved, less leaky capsules. The optimal amount of initiator may vary depending on the nature of the core material. The (meth)acrylate polymer of the polymer wall may be derived from a first initiator and a second initiator, wherein the first initiator and the second initiator are present in a weight ratio of from about 5:1 to about 1:5, or preferably from about 3:1 to about 1:3, or more preferably from about 2:1 to about 1:2, or even more preferably from about 1.5:1 to about 1:1.5.

Suitable free radical initiators may include peroxy initiators, azo initiators, peroxides and compounds such as 2,2'-azodimethylbutyronitrile, dibenzoyl peroxide. More specifically and without limitation, the free radical initiator may be selected from the group of initiators comprising the following items: azo or peroxy initiators, such as peroxides, dialkyl peroxides, alkyl peroxides, peroxyesters, peroxycarbonates, peroxyketones and peroxydicarbonates, 2,2'-azobis(isobutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(isobutyronitrile ... (2-methylpropionitrile), 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cyclohexanecarbonitrile), 1,1'-azobis(cyanocyclohexane), benzoyl peroxide, decanoyl peroxide; lauroyl peroxide; benzoyl peroxide, di(n-propyl) peroxydicarbonate, di(sec-butyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, 1,1-dimethyl-3-hydroxyperoxyneodecanoate butyl ester, a-cumyl peroxyneoheptanoate, tert-amyl peroxyneodecanoate, tert-butyl peroxyneodecanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, 2,5-dimethyl 2,5-di(2-ethylhexanoylperoxy)hexane, tert-amyl peroxy-2-ethylhexanoate, tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxyacetate, di-tert-amyl peroxyacetate, tert-butyl peroxide, di-tert-amyl peroxide, 2,5-dimethyl- 2,5-Di-(tert-butylperoxy)-3-hexyne, cumene hydroperoxide, 1,1-di-(tert-butylperoxy)-3,3,5-trimethyl-cyclohexane, 1,1-di-(tert-butylperoxy)-cyclohexane, 1,1-di-(tert-pentylperoxy)-cyclohexane, ethyl-3,3-di-(tert-butylperoxy)-butyrate, tert-pentyl perbenzoate, tert-butyl perbenzoate, 3,3-di-(tert-pentylperoxy)-butyric acid ethyl ester, etc.

The shell of the delivery particle may comprise, for example, a coating on the outer surface of the shell away from the core. The encapsulate may be manufactured and subsequently coated with a coating material. The coating may be used as a deposition aid. The coating may comprise a cationic material, such as a cationic polymer. However, as described above, when determining the core: wall polymer weight ratio, coatings that are not structural or supporting features of the wall are not included in the calculation.

Non-limiting examples of coating materials include, but are not limited to, materials selected from the group consisting of: poly(meth)acrylates, poly(ethylene-maleic anhydride), polyamines, waxes, polyvinyl pyrrolidone, polyvinyl pyrrolidone copolymers, polyvinyl pyrrolidone-ethyl acrylate, polyvinyl pyrrolidone-vinyl acrylate, polyvinyl pyrrolidone methacrylate, polyvinyl pyrrolidone/vinyl acetate, polyvinyl acetal, polyvinyl butyral, polysiloxanes, poly(propylene maleic anhydride), maleic anhydride derivatives, copolymers of maleic anhydride derivatives, polyvinyl alcohol, styrene-butadiene latex, gelatin, gum arabic, carboxymethyl The coating material can be a cationic polymer. The coating material can include polyvinyl formamide, chitosan or a combination thereof, preferably chitosan.

b. Beneficial Agents

The delivery particles of the present disclosure include a core. The core may contain a benefit agent. Suitable benefit agents located in the core may include benefit agents that provide a beneficial effect to a surface such as fabric or hair.

The core may comprise from about 45% to about 95%, preferably from about 50% to about 80%, more preferably from about 50% to about 70%, by weight of the core, of a benefit agent, which may preferably be a fragrance.

The benefit agent may be selected from the group consisting of fragrances, silicone oils, waxes, hydrocarbons, higher fatty acids, essential oils, lubricants, lipids, skin coolants, vitamins, sunscreens, antioxidants, glycerin, catalysts, bleach particles, silica particles, malodor reducers, odor control materials, chelating agents, antistatic agents, softeners, insect and moth repellents, colorants, antioxidants, chelating agents, base agents, disinfectant drapes and form control agents, lubricants, wrinkle control agents, sanitizers, disinfectants, microbial control agents, mildew control agents, mold control agents, antiviral agents, desiccants, antifouling agents, detergents , fabric fresheners and freshness extension agents, chlorine bleach odor control agents, dye fixatives, dye transfer inhibitors, color retention agents, optical brighteners, color restoration/restore agents, anti-fading agents, whiteness enhancers, anti-abrasion agents, anti-wear agents, fabric integrity agents, anti-wear agents, anti-pilling agents, defoamers, defoaming agents, UV protection agents, light fade inhibitors, anti-allergenic agents, enzymes, water repellents, fabric comfort agents, shrinkage resistance agents, stretch resistance agents, stretch recovery agents, skin care agents, glycerin, synthetic or natural active substances, antibacterial active substances, antiperspirant active substances, cationic polymers, dyes and mixtures thereof.

The encapsulated benefit agent may preferably be a fragrance, which may include one or more fragrance raw materials. As used herein, the term "fragrance raw material" (or "PRM") refers to a compound having a molecular weight of at least about 100 g/mol, and it can be used alone or with other fragrance raw materials to impart odor, fragrance, flavor or fragrance. Typical PRMs include alcohols, ketones, aldehydes, esters, ethers, nitrites and olefins, such as terpenes. Lists of common PRMs can be found in various references, such as "Perfume and Flavor Chemicals", Volumes I and II; Steffen Arctander Allured Pub. Co. (1994) and "Perfumes: Art, Science and Technology", Miller, P.M. and Lamparsky, D., Blackie Academic and Professional (1994).

PRMs can be characterized by their boiling point (B.P.) measured at normal pressure (760 mmHg), and their octanol/water partition coefficient (P), which can be described in terms of logP, as determined according to the test methods below. Based on these properties, PRMs can be classified as Quadrant I, Quadrant II, Quadrant III, or Quadrant IV fragrances, as described in detail below.

The fragrance may include fragrance raw materials having a logP of from about 2.5 to about 4. It should be understood that other fragrance raw materials may also be present in the fragrance.

Perfume raw materials may include perfume raw materials selected from the group consisting of perfume raw materials having a boiling point (B.P.) below about 250°C and a logP of less than about 3, perfume raw materials having a B.P. above about 250°C and a logP of greater than about 3, perfume raw materials having a B.P. above about 250°C and a logP of less than about 3, perfume raw materials having a B.P. below about 250°C and a logP of greater than about 3, and mixtures thereof. Perfume raw materials having a boiling point B.P. below about 250°C and a logP of less than about 3 are referred to as Quadrant I perfume raw materials. Quadrant I perfume raw materials are preferably limited to less than 30% of the perfume composition. Perfume raw materials having a B.P. above about 250°C and a logP greater than about 3 are referred to as Quadrant IV perfume raw materials, those having a B.P. above about 250°C and a logP less than about 3 are referred to as Quadrant II perfume raw materials, and those having a B.P. below about 250°C and a logP greater than about 3 are referred to as Quadrant III perfume raw materials. Suitable Quadrant I, II, III and IV perfume raw materials are disclosed in U.S. Patent No. 6,869,923 Bl.

c. Distribution modifier

The core of the delivery particles of the present disclosure may include a distribution modifier. The properties of the oily material in the core may play a role in determining how much, how fast and/or how permeable the polyacrylate shell material will be when it is formed at the oil/water interface. For example, if the oil phase contains highly polar materials, these materials can reduce the diffusion of acrylate oligomers and polymers to the oil/water interface and produce a very thin, highly permeable shell. The incorporation of a distribution modifier can adjust the polarity of the core, thereby changing the partition coefficient of the polar material in the distribution modifier relative to the acrylate oligomer, and can result in the formation of a well-defined highly impermeable shell. The distribution modifier can be combined with the fragrance oil material of the core before incorporating the wall-forming monomers.

The partitioning modifier may be present in the core at a level of from about 5% to about 55%, preferably from about 10% to about 50%, more preferably from about 25% to about 50% by weight of the core.

The distribution modifier may include a material selected from the group consisting of vegetable oils, modified vegetable oils, monoesters, diesters and triesters of C ₄ -C ₂₄ fatty acids, isopropyl myristate, lauryl benzophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate and mixtures thereof. The distribution modifier may preferably include isopropyl myristate or even consist of isopropyl myristate. The modified vegetable oil may be esterified and/or brominated. The modified vegetable oil may preferably include castor oil and/or soybean oil. U.S. Patent Application Publication No. 20110268802, incorporated herein by reference, describes other distribution modifiers that can be used in the delivery particles described herein.

d. Methods of preparing delivery particles

Delivery particles can be prepared according to known methods, so long as the core:shell ratios described herein are observed. The methods can be further adjusted to obtain other desired characteristics described herein, such as volume weighted particle size, relative amounts of beneficial agents and/or partition modifiers, etc.

For example, the present disclosure relates to a method for preparing a population of delivery particles comprising a core and a polymer wall encapsulating the core. The method may include the step of providing an oil phase. The oil phase may contain a beneficial agent and a distribution modifier, as described above. The method may also include dissolving or dispersing one or more oil-soluble or dispersible multifunctional (meth) acrylate monomers or oligomers into the oil phase, the multifunctional (meth) acrylate monomers or oligomers having at least three, preferably at least four, at least five, or even at least six free radical polymerizable functional groups, provided that at least one of the free radical polymerizable groups is an acrylate or methacrylate.

The oil-soluble or dispersible multifunctional (meth) acrylate monomers or oligomers are described in more detail above. Wherein, the oil-soluble or dispersible multifunctional (meth) acrylate monomers or oligomers may contain multifunctional aromatic urethane acrylates, preferably trifunctional aromatic urethane acrylates, tetrafunctional aromatic urethane acrylates, pentafunctional aromatic urethane acrylates or hexafunctional aromatic urethane acrylates, or mixtures thereof, preferably hexafunctional aromatic urethane acrylates. The monomers or oligomers may contain one or more multifunctional aliphatic urethane acrylates, which can be dissolved or dispersed in the oil phase. The method may also include dissolving or dispersing one or more of amine (meth) acrylates or acidic (meth) acrylates in the oil phase.

The method may further include providing an aqueous phase, which may include an emulsifier, a surfactant, or a combination thereof. The method may further include dissolving or dispersing one or more water-soluble or water-dispersible monofunctional or multifunctional (meth)acrylate monomers and/or oligomers into the aqueous phase.

The method may include the steps of dissolving or dispersing one or more amine (meth)acrylates, acidic (meth)acrylates, polyethylene glycol di(meth)acrylates, ethoxylated monofunctional or multifunctional (meth)acrylates and/or other (meth)acrylate monomers and/or oligomers in the aqueous phase, the oil phase, or both.

Generally speaking, the oil-soluble multifunctional (meth)acrylate monomer is soluble or dispersible in the oil phase, usually soluble in 100 ml of oil at least to the extent of 1 gram at 22° C., or dispersible or emulsifiable therein. The water-soluble multifunctional (meth)acrylate monomer is usually soluble or dispersible in water, usually soluble in 100 ml of water at least to the extent of 1 gram at 22° C., or dispersible therein.

Typically, the oil phase is combined with an excess of the aqueous phase. If more than one oil phase is used, they are typically combined first and then combined with the aqueous phase. If desired, the aqueous phase may also comprise one or more aqueous phases combined sequentially.

The oil phase can be emulsified into the water phase under high shear agitation to form an oil-in-water emulsion, which can contain droplets of the core material dispersed in the water phase. Generally, the amount of shear agitation applied can be controlled to form droplets of a target size, which affects the final size of the finished encapsulate.

The dissolved or dispersed monomers can be reacted by heating or actinic irradiation of the emulsion. The reaction can form a polymer wall at the interface of the droplet and the aqueous phase. The free radical polymerizable groups of the multifunctional methacrylate promote the self-polymerization of the multifunctional methacrylate when heated.

One or more free radical initiators can be provided to the oil phase, the water phase or both, preferably both. For example, the method may include adding one or more free radical initiators to the water phase, for example to provide an additional free radical source when activated by heat. The method may include adding one or more free radical initiators to the oil phase. One or more free radical initiators can be added to the water phase, the oil phase or both in an amount greater than 0% to about 5% by weight of the respective phase. Potential initiators are also contemplated, wherein a first action, particularly a chemical reaction, is required to convert the potential initiator into an active initiator, which then initiates polymerization when exposed to polymerization conditions. When multiple initiators are present, it is contemplated and preferred that each initiator is initiated by different conditions or appropriately initiated by different conditions.

Alternatively, the reaction step may be performed in the absence of an initiator, as it has surprisingly been found that encapsulates can be formed even when a free radical initiator is not present.

In the method, the heating step may include heating the emulsion for about 1 hour to about 20 hours, preferably about 2 hours to about 15 hours, more preferably about 4 hours to about 10 hours, and most preferably about 5 hours to about 7 hours, thereby heating sufficiently to transfer about 500 J/kg to about 5000 J/kg to the emulsion, about 1000 J/kg to about 4500 J/kg to the emulsion, and about 2900 J/kg to about 4000 J/kg to the emulsion.

Prior to the heating step, the emulsion may be characterized by a volume-weighted median particle size of the emulsion droplets of from about 0.5 microns to about 100 microns, or even from about 1 micron to about 60 microns, or even from 20 microns to 50 microns, preferably from about 30 microns to about 50 microns, in order to form a population of delivery particles having a volume-weighted target size of, for example, from about 30 microns to about 50 microns.

The benefit agent may be selected as described above, and is preferably a fragrance comprising one or more fragrance raw materials.The benefit agent may be the major component or even the sole component of the oil phase in which the other materials are dissolved or dispersed.

The partition modifier may be selected from the group consisting of isopropyl myristate, vegetable oils, modified vegetable oils, monoesters, diesters and triesters of C4-C24 fatty acids, lauryl benzophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate and mixtures thereof, preferably isopropyl myristate. The partition modifier may be provided in an amount of about 5% to about 55% by weight of the core of the delivery particle.

As described above, it is desirable that the resulting delivery particles be characterized by a core:polymer wall weight of 96:4 to about 99.5:0.5. It is also desirable that the resulting delivery particles be characterized by a volume weighted median particle size of about 30 microns to about 50 microns.

As a result of the methods for preparing delivery particles provided herein, the delivery particles can be present in an aqueous slurry, for example, the particles can be present in the slurry at a level of about 20% to about 60%, preferably about 30% to about 50%, by weight of the slurry. Additional materials such as preservatives, solvents, structurants or other processing aids or stabilizing aids can be added to the slurry. The slurry can contain one or more fragrances (i.e., unencapsulated fragrances) that are different from the one or more fragrances contained in the core of the benefit agent delivery particles.

Exemplary synthetic methods that can form encapsulates according to the present disclosure are further described in Example 1 below.

Consumer product additives

The composition of the present disclosure, which may be a consumer product, may include a consumer product adjuvant material. The consumer product adjuvant material may provide a benefit in the intended end use of the composition, or it may be a processing aid and/or a stabilizing aid.

Suitable consumer product adjunct materials may include: surfactants, conditioning actives, deposition aids, rheology modifiers or structurants, bleach systems, stabilizers, builders, chelants, dye transfer inhibitors, dispersants, enzymes and enzyme stabilizers, catalytic metal complexes, polymeric dispersants, clay and soil removal/anti-redeposition agents, brighteners, suds suppressors, silicones, hueing agents, aesthetic dyes, additional perfumes and perfume delivery systems, structural elasticizers, carriers, hydrotropes, processing aids, structurants, anti-agglomeration agents, coatings, formaldehyde scavengers, and/or pigments.

Depending on the intended form, formulation and/or end use, the compositions of the present disclosure may not contain one or more of the following adjunct materials: bleach activators, surfactants, builders, chelants, dye transfer inhibitors, dispersants, enzymes and enzyme stabilizers, catalytic metal complexes, polymeric dispersants, clay and soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, additional perfumes and perfume delivery systems, structural elasticizers, fabric softeners, carriers, hydrotropes, processing aids, structurants, anti-agglomeration agents, coatings, formaldehyde scavengers and/or pigments.

The specific nature of these additional components and their incorporation levels will depend on the physical form of the composition and the nature of the operation in which it is used. However, when one or more adjuvants are present, such one or more adjuvants may be present as described in detail below. The following is a non-limiting list of suitable additional adjuvants.

a. Surfactants

The compositions of the present disclosure may include a surfactant. For example, a surfactant may be used to provide a cleaning benefit. The composition may include a surfactant system, which may include one or more surfactants.

The compositions of the present disclosure may comprise from about 0.1% to about 70%, or from about 2% to about 60%, or from about 5% to about 50% of the surfactant system by weight of the composition. Liquid compositions may comprise from about 5% to about 40% of the surfactant system by weight of the composition. Compact formulations, including compact liquids, gels and/or compositions suitable for use in unit dosage forms, may comprise from about 25% to about 70% or from about 30% to about 50% of the surfactant system by weight of the composition.

The surfactant system may include anionic surfactants, nonionic surfactants, zwitterionic surfactants, cationic surfactants, amphoteric surfactants, or combinations thereof. The surfactant system may include linear alkylbenzene sulfonates, alkyl ethoxylated sulfates, alkyl sulfates, nonionic surfactants such as ethoxylated alcohols, amine oxides, or mixtures thereof. The surfactant may be derived at least in part from a natural source, such as a natural raw material alcohol.

Suitable anionic surfactants may include any conventional anionic surfactants. This may include sulfate detersive surfactants (e.g., alkoxylated and/or non-alkoxylated alkyl sulfate materials) and/or sulfonic acid detersive surfactants (e.g., alkylbenzene sulfonates). Anionic surfactants may be linear, branched, or combinations thereof. Preferred surfactants include linear alkylbenzene sulfonates (LAS), alkyl ethoxylated sulfates (AES), alkyl sulfates (AS), or mixtures thereof. Other suitable anionic surfactants include branched modified alkylbenzene sulfonates (MLAS), methyl ester sulfonates (MES), sodium lauryl sulfate (SLS), sodium lauryl ether sulfate (SLES), and/or alkyl ethoxylated carboxylates (AEC). Anionic surfactants may exist in acid form, salt form, or mixtures thereof. Anionic surfactants may be partially or completely neutralized, for example, by alkali metals (e.g., sodium) or amines (e.g., monoethanolamine).

Surfactant system can comprise nonionic surfactant.Suitable nonionic surfactant comprises alkoxylated fatty alcohol, such as ethoxylated fatty alcohol.Other suitable nonionic surfactant comprises alkoxylated alkylphenol, alkylphenol condensate, mid-chain branched alcohol, mid-chain branched alkyl alkoxylate, alkyl polysaccharide (for example alkyl polyglycoside), polyhydroxy fatty acid amide, ether-terminated poly (alkoxylated) alcohol surfactant and their mixture.Alkoxylate unit can be ethyleneoxy unit, propyleneoxy unit or their mixture.Nonionic surfactant can be linear, branched (for example, mid-chain branched) or their combination.Specific nonionic surfactant can comprise alcohol with average about 12 to about 16 carbon atoms and average about 3 to about 9 ethoxy groups, such as C12-C14EO7 nonionic surfactant.

Suitable zwitterionic surfactants may include any conventional zwitterionic surfactants, such as betaines, including alkyl dimethyl betaine and cocodimethylamidopropyl betaine, _C8 to _C18 (e.g., _C12 to _C18 ) amine oxides (e.g., _C12-14 dimethyl amine oxide), and/or sulfobetaines and hydroxybetaines, such as N-alkyl-N,N-dimethylamino-1-propane sulfonate, wherein the alkyl group may be _C8 to _C18 or _C10 to _C14 . The zwitterionic surfactant may include an amine oxide.

Depending on the formulation and/or intended end use, the composition may be substantially free of certain surfactants. For example, a liquid fabric enhancer composition, such as a fabric softener, may be substantially free of anionic surfactants, since such surfactants may interact adversely with cationic ingredients.

b. Conditioning active substances

The compositions of the present disclosure may include conditioning actives. Compositions including conditioning actives may provide softness, anti-wrinkle, anti-static, conditioning, anti-stretch, color, and/or appearance benefits.

Conditioning actives may be present at a level of from about 1% to about 99% by weight of the composition. The composition may contain from about 1%, or from about 2%, or from about 3% to about 99%, or to about 75%, or to about 50%, or to about 40%, or to about 35%, or to about 30%, or to about 25%, or to about 20%, or to about 15%, or to about 10% conditioning actives by weight of the composition. The composition may contain from about 5% to about 30% conditioning actives by weight of the composition.

Suitable conditioning actives for use in the compositions of the present disclosure may include quaternary ammonium ester compounds, silicones, non-ester quaternary ammonium compounds, amines, fatty esters, sucrose esters, silicones, dispersible polyolefins, polysaccharides, fatty acids, softening or conditioning oils, polymer latexes, or combinations thereof.

The composition may include a quaternary ammonium ester compound, a silicone, or a combination thereof, preferably a combination. The total amount of the quaternary ammonium ester compound and the silicone combined may be from about 5% to about 70%, or from about 6% to about 50%, or from about 7% to about 40%, or from about 10% to about 30%, or from about 15% to about 25% by weight of the composition. The composition may include a quaternary ammonium ester compound and silicone in a weight ratio of from about 1:10 to about 10:1, or from about 1:5 to about 5:1, or from about 1:3 to about 1:3, or from about 1:2 to about 2:1, or from about 1:1.5 to about 1.5:1, or about 1:1.

The composition may contain a mixture of different types of conditioning actives. The composition of the present disclosure may contain certain conditioning actives, but may be substantially free of other conditioning actives. For example, the composition may be free of quaternary ammonium ester compounds, silicones, or both. The composition may contain quaternary ammonium ester compounds, but may be substantially free of silicones. The composition may contain silicones, but may be substantially free of quaternary ammonium ester compounds.

c. Deposition aid

The compositions of the present disclosure may include a deposition aid. The deposition aid may facilitate deposition of the delivery particles, conditioning actives, fragrances, or combinations thereof, thereby improving the performance benefits of the composition and/or allowing for more efficient formulation of such benefit agents. The composition may include from 0.0001% to 3%, preferably from 0.0005% to 2%, more preferably from 0.001% to 1%, or from about 0.01% to about 0.5%, or from about 0.05% to about 0.3% of a deposition aid by weight of the composition. The deposition aid may be a cationic polymer or an amphoteric polymer, preferably a cationic polymer.

Generally speaking, cationic polymers and methods for their manufacture are known in the literature. Suitable cationic polymers may include quaternary ammonium polymers known as "polyquaternium" polymers, as specified by the International Nomenclature for Cosmetic Ingredients, such as Polyquaternium-6 (poly(diallyldimethylammonium chloride)), Polyquaternium-7 (copolymer of acrylamide and diallyldimethylammonium chloride), Polyquaternium-10 (quaternized hydroxyethylcellulose), Polyquaternium-22 (copolymer of acrylic acid and diallyldimethylammonium chloride), and the like.

The deposition aid may be selected from the group consisting of polyvinyl formamide, partially hydroxylated polyvinyl formamide, polyvinyl amine, polyethylene imine, ethoxylated polyethylene imine, polyvinyl alcohol, polyacrylate, and combinations thereof.The cationic polymer may include a cationic acrylate.

The deposition aid may be added simultaneously with the delivery particles (e.g., simultaneously with the encapsulated benefit agent) or directly/separately to the consumer product composition. The weight average molecular weight of the polymer may be from 500 to 5,000,000 Daltons, or from 1,000 to 2,000,000 Daltons, or from 2,500 to 1,500,000 Daltons, as measured by size exclusion chromatography relative to polyethylene oxide standards using refractive index (RI) detection. The weight average molecular weight of the cationic polymer may be from 5,000 to 37,500 Daltons.

d. Rheology modifier / structurant

The compositions of the present disclosure may include rheology modifiers and/or structurants. Rheology modifiers can be used to "thicken" or "thin down" a liquid composition to a desired viscosity. Structurants can be used to promote phase stability and/or suspend or inhibit aggregation of particles in a liquid composition, such as delivery particles as described herein.

Suitable rheology modifiers and/or structurants may include non-polymeric crystalline hydroxy-functional structurants (including those based on hydrogenated castor oil), polymeric structurants, cellulosic fibers (e.g., microfibrillated cellulose, which may be derived from bacteria, fungi, or plant sources, including from wood), diamido gelling agents, or combinations thereof.

The polymer structuring agent may be of natural or synthetic origin. Natural polymer structuring agents may include: hydroxyethyl cellulose, hydrophobically modified hydroxyethyl cellulose, carboxymethyl cellulose, polysaccharide derivatives and mixtures thereof. Polysaccharide derivatives may include: pectin, alginate, arabinogalactan (gum arabic), carrageenan, gellan gum, xanthan gum, guar gum and mixtures thereof. Synthetic polymer structuring agents may include: polycarboxylates, polyacrylates, hydrophobically modified ethoxylated polyurethanes, hydrophobically modified nonionic polyols and mixtures thereof. Polycarboxylate polymers may include polyacrylates, polymethacrylates or mixtures thereof. Polyacrylates may include copolymers of unsaturated monocarbonic or dicarbonic acids and C ₁ -C ₃₀ alkyl esters of (meth) acrylic acid. Such copolymers may be purchased from Noveon under the trade name Carbopol Aqua 30. Another suitable structuring agent is sold under the trade name Rheovis CDE, purchased from BASF.

Method for preparing the composition

The present disclosure relates to methods of making any of the compositions described herein.A method of making a composition (which may be a consumer product) may include the step of combining a delivery particle as described herein with a consumer product adjuvant material as described herein.

When the delivery particles are in one or more forms (including slurry form, pure delivery particle form and/or spray-dried delivery particle form), the delivery particles can be combined with such one or more consumer product auxiliary materials. The delivery particles can be combined with such consumer product auxiliary materials by methods including mixing and/or spraying.

Compositions disclosed herein can be formulated into any suitable form and prepared by any method selected by the formulation personnel. Delivery particles and auxiliary materials can be combined in batch methods, in a recycle loop method, and/or by an online mixing method. Suitable equipment for the method disclosed herein may include a continuous stirred tank reactor, a homogenizer, a turbine agitator, a recirculation pump, a paddle mixer, a high shear mixer, a static mixer, a plow shear mixer, a ribbon blender, a vertical shaft granulator and a drum mixer (the two of which can be in an intermittent process configuration and a continuous process configuration (when available)), a spray dryer and an extruder.

Method for treating a surface or article

The present disclosure also relates to methods of treating surfaces or articles with compositions according to the present disclosure. Such methods can provide cleaning, conditioning and/or refreshing benefits.

Suitable surfaces or articles may include fabrics (including clothing, towels or linens), hard surfaces (such as tile, porcelain, linoleum or wood floors), dishes, hair, skin, or mixtures thereof.

The method may include the step of contacting a surface or article with a composition of the present disclosure. The composition may be pure or diluted in a liquid, such as a wash liquid or a rinse liquid. The composition may be diluted in water before, during or after contacting the surface or article. The surface or article may be optionally washed and/or rinsed before and/or after the contacting step.

The method of treating and/or cleaning a surface or article may comprise the following steps:

a) optionally washing, rinsing and/or drying the surface or article;

b) contacting the surface or article with a composition as described herein, optionally in the presence of water;

c) optionally washing and/or rinsing the surface or article; and

d) optionally by passive drying and/or via active methods such as a laundry washer dryer.

For purposes of the present invention, washing includes, but is not limited to, scrubbing and mechanical agitation. The fabrics may comprise most any fabric capable of being washed or handled under normal consumer use conditions.

Liquids that may contain the disclosed compositions may have a pH of about 3 to about 11.5. Such compositions are typically used at a concentration of about 500 ppm to about 15,000 ppm in solution when diluted. When the wash solvent is water, the water temperature is typically in the range of about 5°C to about 90°C, and when the site includes fabric, the water to fabric ratio is typically about 1:1 to about 30:1.

combination

Specific contemplated combinations of the present disclosure are described herein in the paragraphs with the following subscripts. These combinations are exemplary in nature and not limiting.

A. A consumer product composition comprising: a processing aid and a population of delivery particles, wherein the delivery particles include a core and a polymer wall surrounding the core, wherein the core comprises a benefit agent and a partitioning modifier, wherein the partitioning modifier is present in the core at a level of about 5% to about 55% by weight of the core, wherein the polymer wall comprises a (meth)acrylate polymer derived at least in part from one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers having at least three free radically polymerizable functional groups, provided that at least one of the free radically polymerizable groups is an acrylate or methacrylate; wherein the core and the polymer wall are present in a weight ratio of about 96:4 to about 99.5:0.5; and wherein the delivery particles are characterized by a volume weighted median particle size of 30 microns to 50 microns.

B. A consumer product composition according to paragraph A, wherein the delivery particle comprises the core and the polymer wall in a weight ratio of about 97:3 to about 99:1, more preferably about 98:2 to about 99:1.

C. A consumer product composition according to any of paragraphs A or B, wherein the one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers contain at least four, preferably at least five, more preferably at least six, and even more preferably exactly six free radically polymerizable functional groups.

D. The consumer product composition of any of paragraphs A to C, wherein the free radical polymerizable functional groups are each independently selected from the group consisting of acrylates and methacrylates.

E. The consumer product composition of any of paragraphs A to D, wherein the oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer comprises a multifunctional aromatic urethane acrylate.

F. The consumer product composition of any of paragraphs A to E, wherein the oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer comprises a hexafunctional aromatic urethane acrylate.

G. The consumer product composition of any of paragraphs A to F, wherein the oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer comprises a multifunctional aliphatic urethane acrylate.

H. The consumer product composition of any of paragraphs A to G, wherein the (meth)acrylate polymer is further derived at least in part from a monomer selected from an amine methacrylate, an acidic methacrylate, or a combination thereof.

I. A consumer product composition according to any of paragraphs A to H, wherein the (meth)acrylate polymer of the polymer wall is derived from the reaction product of the oil-soluble or oil-dispersible multifunctional (meth)acrylate, a second monomer and a third monomer, preferably, wherein the second monomer comprises a basic (meth)acrylate monomer, and wherein the third monomer comprises an acidic (meth)acrylate monomer.

J. A consumer product composition according to any of paragraphs A to I, wherein the (meth)acrylate polymer of the polymer wall is further derived from a water-soluble or water-dispersible monofunctional or multifunctional (meth)acrylate monomer or oligomer, and the water-soluble or water-dispersible monofunctional or multifunctional (meth)acrylate monomer or oligomer is preferably selected from the group consisting of: amine (meth)acrylates, acidic (meth)acrylates, polyethylene glycol di(meth)acrylates, ethoxylated monofunctional (meth)acrylates, ethoxylated multifunctional (meth)acrylates, other (meth)acrylate monomers, other (meth)acrylate oligomers, and mixtures thereof.

K. A consumer product composition according to any of paragraphs A to J, wherein the polymer wall of the delivery particle further comprises a polymer emulsifier entrapped in the polymer wall, preferably, wherein the polymer emulsifier comprises polyvinyl alcohol.

L. A consumer product composition according to any of paragraphs A to K, wherein the (meth)acrylate polymer of the polymer wall is further derived at least in part from at least one free radical initiator, preferably, wherein the at least one free radical initiator comprises a water-soluble or water-dispersible free radical initiator, more preferably, wherein the at least one free radical initiator comprises a water-soluble or water-dispersible free radical initiator and an oil-soluble or oil-dispersible free radical initiator.

M. A consumer product composition according to any of paragraphs A to L, wherein the free radical initiator is present in an amount of about 2% to about 50%, preferably about 5% to about 40%, more preferably about 10% to about 40%, even more preferably about 15% to about 40%, even more preferably about 20% to about 35%, or more preferably about 20% to about 30%, based on the weight of the polymer wall.

N. A consumer product composition according to any of paragraphs A to M, wherein the benefit agent is a fragrance, preferably a fragrance comprising a fragrance raw material characterized by a logP of about 2.5 to about 4.

O. A consumer product composition according to any of paragraphs A to N, wherein the partitioning modifier is selected from the group consisting of isopropyl myristate, vegetable oils, modified vegetable oils, monoesters, diesters and triesters of C4-C24 fatty acids, lauryl benzophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate and mixtures thereof, preferably isopropyl myristate.

P. A consumer product composition according to any of paragraphs A to O, wherein the population of delivery particles is characterized by an average burst strength of about 0.2 MPa to about 10 MPa, preferably about 0.5 MPa to about 8 MPa, more preferably about 0.5 MPa to about 5 MPa.

Q. A consumer product composition according to any of paragraphs A to P, wherein the polymer wall of the delivery particle further comprises a coating material, preferably, wherein the coating material is selected from the group consisting of: poly(meth)acrylates, poly(ethylene-maleic anhydride), polyamines, waxes, polyvinylpyrrolidone, polyvinylpyrrolidone copolymers, polyvinylpyrrolidone-ethyl acrylate, polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methacrylate, polyvinylpyrrolidone/vinyl acetate, polyvinyl acetal; polyvinyl butyral, polysiloxanes, poly(propylene maleic anhydride), maleic anhydride derivatives, copolymers of maleic anhydride derivatives. , polyvinyl alcohol, styrene-butadiene latex, gelatin, gum arabic, carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxyethyl cellulose, other modified celluloses, sodium alginate, chitosan, casein, pectin, modified starch, polyvinyl acetal, polyvinyl butyral, polyvinyl methyl ether/maleic anhydride, polyvinyl pyrrolidone and its copolymers, poly(vinyl pyrrolidone/methacrylamidopropyltrimethylammonium chloride), polyvinyl pyrrolidone/vinyl acetate, polyvinyl pyrrolidone/dimethylaminoethyl methacrylate, polyvinyl amine, polyvinyl formamide, polyallylamine, copolymers of polyvinyl amine and mixtures thereof.

R. A consumer product composition according to any of paragraphs A to Q, wherein the delivery particles are characterized by a volume weighted median particle size of about 30 microns to about 40 microns.

S. A consumer product composition according to any of paragraphs A to R, wherein the composition further comprises from about 0.05% to about 20%, preferably from about 0.05% to about 10%, more preferably from about 0.1% to about 5%, even more preferably from about 0.2% to about 2% of the delivery particles by weight of the composition.

T. A consumer product composition according to any of paragraphs A to S, wherein the processing aid is selected from the group consisting of surfactants, conditioning actives, deposition aids, rheology modifiers or structurants, bleach systems, stabilizers, builders, chelants, dye transfer inhibitors, dispersants, enzymes, enzyme stabilizers, catalytic metal complexes, polymeric dispersants, clay and soil removal/anti-redeposition agents, brighteners, suds suppressors, silicones, hueing agents, aesthetic dyes, neat perfumes, additional perfume delivery systems, structural elasticizers, carriers, hydrotropes, processing aids, anti-agglomeration agents, coatings, formaldehyde scavengers, pigments, and mixtures thereof.

U. A consumer product composition according to any one of paragraphs A to T, wherein the composition is a fabric care composition, a hard surface cleaner composition, a dish care composition, a hair care composition, a body cleansing composition or a mixture thereof, preferably a fabric care composition, preferably a fabric care composition, i.e. a laundry detergent composition, a fabric conditioning composition, a laundry detergent additive, a fabric pretreatment composition, a fabric refresher composition or a mixture thereof.

V. A consumer product composition according to any of paragraphs A to U, wherein the composition is in the form of a liquid composition, a granular composition, a hydrocolloid, a single compartment pouch, a multi-compartment pouch, a dissolvable sheet, a pastille or bead, a fiber product, a tablet, a stick, a strip, a flake, a foam/mousse, a nonwoven sheet, or a mixture thereof.

W. A method of treating a surface, wherein the method comprises the step of contacting the surface with a consumer product composition according to any of paragraphs A to V, optionally in the presence of water.

Test Method

It should be understood that the test methods disclosed in the Test Methods section of this application should be used to determine corresponding parameter values for applicants' claimed subject matter as claimed and described herein.

Extract the delivery particles from the finished product .

Except as otherwise indicated herein, the preferred method for separating delivery particles from finished products is based on the fact that the density of most such delivery particles is different from the density of water. The finished product is mixed with water to dilute and/or release the delivery particles. The diluted product suspension is centrifuged to accelerate the separation of the delivery particles. Such delivery particles tend to float or sink in the dilute solution/dispersion of the finished product. Using a pipette or a spatula, remove the top and bottom layers of the suspension, and undergo additional dilution and centrifugation cycles to separate and enrich the delivery particles. Use an optical microscope equipped with a cross-polarized filter (crossed-polarizedfilters) or differential interference contrast (DIC) to observe the delivery particles at a total magnification of 100 times and 400 times. Microscopic observation provides an initial indication of the presence, size, quality and aggregation of the delivery particles.

To extract the delivery particles from the liquid fabric enhancer, the finished product undergoes the following steps:

1. Place three approximately 20 ml aliquots of liquid fabric enhancer into three separate 50 ml centrifuge tubes and dilute each aliquot 1:1 with deionized water (e.g. 20 ml fabric enhancer + 20 ml deionized water), mix each aliquot thoroughly, and centrifuge each aliquot at approximately 10,000 x g for 30 minutes.

2. After centrifugation in step 1, discard the bottom water layer (about 10 ml) in each 50 ml centrifuge tube, and then add 10 ml of deionized water to each 50 ml centrifuge tube.

3. For each aliquot, the process of centrifuging, removing the bottom aqueous layer, and then adding 10 ml of deionized water to each 50 ml centrifuge tube was repeated two more times.

4. Remove the top layer with a spatula or pipette, and

5. Transfer the top layer to a 1.8 ml centrifuge tube and centrifuge at approximately 20,000 x g for 5 minutes.

6. Remove the top layer with a scraper and transfer to a new 1.8 ml centrifuge tube and add deionized water until the tube is completely full, then centrifuge at approximately 20,000 x g for 5 minutes.

7. Remove the bottom layer with a fine pipette and add deionized water until the tube is completely full and centrifuge at approximately 20,000 x g for 5 minutes.

8. Repeat step 7 5 more times (6 times in total).

If both the top layer and bottom layer of the enriched delivery particles appear in step 1 above, immediately go to step 3 (i.e., ignore step 2) and continue with steps 4 to 8. Once those steps have been completed, use a scraper or/and a pipette to remove the bottom layer from the 50 ml centrifuge tube in step 1. Transfer the bottom layer to a 1.8 ml centrifuge tube and centrifuge at approximately 20,000 × g for 5 minutes. Remove the bottom layer in the new tube and add deionized water until the tube is completely full, then centrifuge at approximately 20,000 × g for 5 minutes. Remove the top layer (water) and add deionized water again until the tube is full. Repeat this 5 more times (6 times in total). Reassemble the enriched delivery particles and the separated top and bottom layers together.

If the fabric enhancer has a white color, or the delivery particle-enriched layer is difficult to discern, add 4 drops of dye (such as Liquitint Blue JH 5% premix from Milliken & Company (Spartanburg, South Carolina, USA)) to the centrifuge tube from step 1 and separate as described above.

For extraction of delivery particles from solid finished products that are easily dispersed in water, 1 L of deionized water is mixed with 20 g of the finished product (e.g., detergent foams, films, gels, and granules; or water-soluble polymers; soap flakes and bars; and other readily water-soluble matrices such as salts, sugars, clays, and starches). When extracting delivery particles from finished products that are not easily dispersed in water, such as waxes, dryer sheets, dryer strips, and greasy materials, it may be necessary to add detergent, stir and/or gently heat the product, and dilute in order to release the delivery particles from the matrix. The use of organic solvents or drying of the delivery particles should be avoided during the extraction step, as these actions can damage the delivery particles during this stage.

To extract the delivery particles from a liquid finished product that is not a fabric softener or fabric enhancer (e.g., liquid laundry detergent, liquid dishwashing detergent, liquid hand soap, lotion, shampoo, conditioner, and hair dye), 20 ml of the finished product is mixed with 20 ml of deionized water. If necessary, NaCl (e.g., 1 g to 4 g NaCl) may be added to the diluted suspension to increase the density of the solution and facilitate the floating of the delivery particles to the top layer. If the product has a white color that makes it difficult to discern the delivery particle layer formed during centrifugation, a water-soluble dye may be added to the diluent to provide visual contrast.

The water and product mixture is subjected to successive centrifugation cycles involving removal of the top and bottom layers, resuspension of those layers in new diluent, and then further centrifugation, separation, and resuspension. Each centrifugation cycle occurs in a tube of 1.5 ml to 50 ml volume, using a centrifugal force of up to 20,000 × g, for a period of 5 minutes to 30 minutes. At least six centrifugation cycles are typically required to extract and clean enough delivery particles for testing. For example, an initial centrifugation cycle can be performed in a 50 ml tube, spinning at 10,000 × g for 30 minutes, followed by five additional centrifugation cycles in which the material from the top and bottom layers is resuspended separately in new diluent in a 1.8 ml tube, and each cycle is spun at 20,000 × g for 5 minutes.

If delivery particles are observed microscopically in both the top and bottom layers, the delivery particles from both layers are recombined after the final centrifugation step to form a single sample containing all the delivery particles extracted from the product. The extracted delivery particles should be analyzed as quickly as possible, but they can be stored as a suspension in deionized water for up to 14 days prior to analysis.

Those skilled in the art will recognize that various other schemes may be devised for extracting and isolating the delivery particles from the finished product, and will recognize that such methods need to be validated by comparing the resulting measurements taken before and after adding the delivery particles to the finished product and extracting the delivery particles from the finished product.

Leakage of beneficial agent

The beneficial agent leakage of the delivery particles was determined according to the following method:

a.) Two samples of a feedstock slurry of delivery particles are obtained in amounts such that 1 g of encapsulated flavor (eg, 1 g of flavor oil, excluding shell and/or partitioning modifier, if present) is present in each sample (or other amounts as indicated).

b.) Add one sample of the raw material slurry of delivery particles to an appropriate amount of product matrix (e.g., liquid detergent product or LFE product) where the delivery particles will be used to make a total of 100 g (e.g., 5 g slurry and 95 g product matrix) and label the mixture as Sample 1. Use a second sample of the raw material delivery particle slurry in its pure form without contacting the product matrix immediately in step d below and label it as Sample 2.

c.) The product matrix containing the delivery particles (Sample 1) was aged at 35°C (or other time and/or temperature as indicated) in a sealed glass jar for one week.

d.) Using filtration, the delivery particles were recovered from both samples. The delivery particles in Sample 1 (in the product matrix) were recovered after the aging step. The delivery particles in Sample 2 (the pure raw material slurry) were recovered at the same time as the aging step for Sample 1 was initiated.

e.) treating the recovered delivery particles with a solvent to extract the benefit agent material from the delivery particles.

f.) The solvent containing the beneficial agent extracted from each sample is analyzed via chromatography. The resulting beneficial agent peak areas under the curve are integrated and the areas are summed to determine the total amount of beneficial agent extracted from each sample.

g.) Determine the benefit agent leakage percentage by calculating the difference between the total amount of benefit agent extracted from Sample 2 and the total amount of benefit agent extracted from Sample 1, expressed as a percentage of the total amount of benefit agent extracted from Sample 2, as represented by the following formula:

Viscosity

The viscosity of the finished liquid product was measured using an AR 550 rheometer/viscometer from TA Instruments (New Castle, DE, USA) with parallel steel plates having a 40 mm diameter and a 500 μm gap size. The high shear viscosity at ^{20 s-1} and the low shear viscosity at 0.05 s ^-1 were obtained by a logarithmic shear rate sweep from 0.01 s ^-1 to 25 s ^-1 over a period of 3 minutes at 21°C.

Fragrances, Fragrance Raw Materials (PRMs) and/or Partition Modifiers

A. Identity and Total Amount

To determine the identity of the fragrance, fragrance ingredient or fragrance raw material (PRM), or partition modifier in the capsule slurry, and/or the fragrance, fragrance ingredient or fragrance raw material encapsulated in the delivery agent encapsulate and quantify its total weight, a gas chromatograph with a mass spectrometer/flame ionization detector (GC-MS/FID) is used. Suitable equipment includes: Agilent Technologies G1530A GC/FID; Hewlett Packer Mass Selective Device 5973; and a 5% phenyl-methyl polysiloxane column J&W DB-5 (30m long×0.25mm inner diameter×0.25μm film thickness). Approximately 3g of the finished product or suspension of the delivery encapsulate is weighed and the weight is recorded, then the sample is diluted with 30mL of deionized water and filtered through a 5.0μm pore size nitrocellulose filter membrane. The material trapped on the filter is dissolved in 5mL of ISTD solution (25.0mg/L tetradecane in anhydrous alcohol) and heated at 60°C for 30 minutes. The cooled solution was filtered through a 0.45 μm pore size PTFE syringe filter and analyzed via GC-MS/FID. Three known fragrance oils were used as comparative benchmark standards. Data analysis involved summing the total area counts minus the ISTD area counts and calculating the average response factor (RF) of the 3 standard fragrances. The response factor and total area counts of the product of the encapsulated fragrance were then used together with the sample weight to determine the total weight percentage of each PRM in the encapsulated fragrance. PRMs were indicated by mass spectrum peaks.

B. Amount of Unencapsulated Material

To determine the amount of unencapsulated flavor and (optionally) partitioning modifier material in a composition such as a slurry, the analytical method provided following the table below may be used, using the following equipment for the analysis.

To prepare fragrance standards in ISS Hexane, weigh 0.050 +/- 0.005 g of desired PMC fragrance oil into a 50 mL volumetric flask (or other volume size recalculated for grams of fragrance oil to be added). Fill to the line with ISS Hexane solution from above. ISS Hexane is 0.1 g tetradecane in 4 liters of hexane.

To prepare a 5% surfactant solution, weigh 50 g +/- 1 g of sodium dodecyl sulfate in a beaker and quantitatively transfer to a 1 liter volumetric flask using purified water, ensuring that the surfactant is completely dissolved.

To prepare a sample of a PMC composition (e.g., slurry), confirm that the composition (e.g., slurry) is well mixed; mix if necessary. Weigh 0.3 +/- 0.05 g of the composition sample onto the bottom of a 10 mL vial. Avoid getting composition on the walls of the vial.

To operate the instrument, determine the target ion used to quantify each PRM (and optional partition modifier) and at least one limiting ion, preferably two limiting ions. A calibration curve is generated from a fragrance standard for each PRM. The integral and amount of the extracted ion (EIC) for each PRM is plotted or recorded using the sample weight and the individual PRM weight %.

The amount of free oil is determined from the response of each PRM to the calibration curve and summed for all the different fragrances and optional partitioning modifiers.

C. Determination of Encapsulation Materials

The encapsulated oil and optional partitioning modifier are determined by subtracting the weight of free/unencapsulated oil found in the composition (eg, slurry) from the total oil (by weight) found in the composition.

Analytical determination of wall materials

This method determines the amount of wall material. First, the wall material of particles with a size greater than 0.45 micrometer is separated by terminal filtration. Subsequent analysis by thermogravimetric analysis allows the removal of inorganic materials and other (organic) raw material slurry components.

A. Sample Preparation

The procedure applies terminal filtration to remove the soluble portion of the sample. Different solvents are used sequentially to maximize the removal of interfering substances prior to TGA analysis.

Use the following materials and/or equipment:

·Filtration equipment

ο Vacuum pump: Millipore model WP6122050 or equivalent.

ο Thick-walled vacuum tubing connecting the pump to the filter unit.

o Filter flask 500ml or 1000ml.

o Filter cup: e.g. 250 ml Millipore filter funnel ("Milli Cup"), filter material: 0.45 micron membrane, solvent resistant.

o A sealable plastic container to hold the filter unit while weighing.

ο Standard laboratory glassware (glass beaker 100ml-250ml, measuring cylinder 50ml-250ml).

Drying equipment

o Vacuum oven and vacuum pump (settings 60°C-70°C/vacuum: 30 inches Hg vacuum).

o Desiccator or constant humidity chamber (to keep residue under controlled environment during cooling).

Solvent

οAll solvents: Analytical grade minimum: 2-propanol, acetone, chloroform

The filtration procedure is as follows: To prepare the filter device, record the weight of a pre-dried filter device (eg, a Milli cup filter) down to 0.1 mg-0.2 mg. Pre-drying involves the same drying step that is performed on the filter after filtration is complete.

Filter the sample by weighing 1 gram to 2 grams of slurry material (note that the weight is reduced to 0.1mg-0.2mg) into a glass beaker (250ml) or directly into the filter apparatus. Add 20ml of deionized water and vortex to homogenize the sample. Add 80ml of isopropanol and homogenize the sample with the solvent; use heating to flocculate the sample. Place the filter apparatus on the filter bottle and start vacuum filtration. After the filtration is complete, add 100ml of chloroform. Continue filtering. Add 10ml-20ml of acetone and filter through a membrane to remove traces of chloroform. Remove the filter from the filtration system and dry it in a vacuum oven. After cooling, weigh the filter and record the weight.

The percent residue (gravimetric residue) was calculated by dividing the weight difference of filter+residue and filter weight only (=net weight of residue after filtration) by the feedstock slurry sample weight and multiplying by 100 to obtain % units. The % residue was measured continuously by TGA analysis.

Thermogravimetric analysis (TGA) was performed with the following equipment and settings: TGA: TA instruments Discovery TGA; Pan: sealed aluminum; Purge: N2 at 50 ml/min; Program: ramp to 500°C at 10°C/min; TGA was coupled to a Nicolet Nexus 470 FTIR spectrometer for evolving gases.

For TGA data analysis, the weight loss between 350°C and 500°C is due to the decomposition of the polymer wall material of the fragrance microcapsules and the remaining (burned) fragrance compounds. To calculate the insoluble polymer fraction, this weight loss is used. At 500°C, there is still a residue of unburned material, and this residue should be taken into account when calculating the insoluble polymer fraction.

Analytical determination of core:wall ratio

When the amounts of core and wall material feed are not readily available, the methods described herein can be used to analytically determine the core:wall ratio of the encapsulates.

More specifically, the above method allows the determination of the amount of fragrance, partition modifier and wall material (by weight) in a fragrance capsule composition (e.g., a slurry) and can be used to calculate the core:wall ratio. This is done by dividing the total amount of fragrance plus partition modifier (by weight) present in the composition by the amount of cross-linked wall material (by weight) present in the composition.

Test Methods for Determining logP

The logarithm of the octanol/water partition coefficient (logP) was calculated for each PRM in the tested fragrance mixture. The logP of the individual PRMs was calculated using the Consensus logP Computational Model, version 14.02 (Linux), purchased from Advanced Chemistry Development Inc. (ACD/Labs) (Toronto, Canada) to provide dimensionless logP values. The Consensus logP Computational Model from ACD/Labs is part of the ACD/Labs model suite.

Volume-weighted particle size and size distribution

Volume-weighted capsule size distribution was determined by single particle optical sensing (SPOS), also known as optical particle counting (OPC), using an AccuSizer 780AD instrument and accompanying software CW788 version 1.82 (Particle Sizing Systems, Santa Barbara, California, U.S.A.) or equivalent. The instrument was configured with the following conditions and options: flow rate = 1 ml/sec; lower size threshold = 0.50 μm; sensor model = LE400-05 or equivalent; autodilution = on; collection time = 60 seconds; number of channels = 512; container fluid volume = 50 ml; maximum overlap = 9200. The measurement was started by flushing the sensor into a cold state with water until the background count was less than 100. The sample in the suspension of the delivery capsules was introduced and the density of the capsules was adjusted with DI water by autodilution as needed to obtain a capsule count of at least 9200/ml. The suspension was analyzed over a period of 60 seconds. The resulting volume-weighted PSD data is plotted and recorded, and the desired volume-weighted particle size value (eg, median/50th percentile, 5th percentile, and/or 90th percentile) is determined.

The breadth index can be calculated by determining the delivered particle size exceeding 90% of the cumulative particle volume (90% size), the particle size exceeding 5% of the cumulative particle volume (5% size), and the median volume-weighted particle size (50% particle size: 50% of the particle volume both above and below this particle size).

Width Index = ((90% size) - (5% size))/50% size.

Bursting Strength Test Method

To measure the average rupture strength of a population and/or determine the delta rupture strength, three different measurements are performed: i) the volume weighted capsule size distribution; ii) the diameters of 10 individual capsules in each of the 3 specified size ranges (and/or 30 individual capsules at the median volume weighted particle size if the average rupture strength is to be determined), and; iii) the rupture force of the same 30 individual capsules.

a.) Determine the volume weighted capsule size distribution as described above. Plot and record the resulting volume weighted PSD data, and determine the median, 5th percentile, and 90th percentile values.

b.) The diameter and rupture force value (also called burst force value) of each capsule is measured by a custom-made computer-controlled micromanipulation instrument system having a lens and camera capable of imaging the delivery capsules and having a fine flat-end probe connected to a force sensor (such as Model 403A purchased from Aurora Scientific Inc. (Canada)) or equivalent, as described in the following literature: Zhang, Z. et al. (1999) "Mechanical strength of single microcapsules determined by a novel micromanipulation technique." J. Microencapsulation, Vol. 16, No. 1, pp. 117-124, and Sun, G. and Zhang, Z. (2001) "Mechanical Properties of Melamine-Formaldehyde microcapsules." J. Microencapsulation, Vol. 18, No. 5, pp. 593-602, and available from University of Birmingham (Edgbaston, Birmingham, UK).

c.) Place a drop of the delivery capsule suspension on a glass microscope slide and dry for several minutes at ambient conditions to remove water and obtain a sparse monolayer of individual capsules on the dried slide. Adjust the concentration of capsules in the suspension as needed to obtain the appropriate capsule density on the slide. More than one slide preparation may be required.

d.) The slide was then placed on the sample holder of the micromanipulator. Thirty beneficial effect delivery capsules on the slide were selected for measurement so that ten capsules were selected within each of three predetermined size bands. Each size band refers to the capsule diameter derived from the volume-weighted PSD generated by the Accusizer. The three size bands for the capsules are: median/50th percentile diameter +/- 2 μm; 5th percentile diameter +/- 2 μm; and 90th percentile diameter +/- 2 μm. Capsules that were deflated, leaking, or damaged were excluded from the selection process and were not measured.

i. If there are not enough capsules available at a particular size band +/- 2 μm, the size band may be increased to +/- 5 μm.

ii. If the average burst strength of a population is to be determined, 30 (or more) capsules at the median/50th percentile size band may be measured.

e.) For each of the 30 selected capsules, the diameter of the capsule was measured from the image on the micromanipulator and recorded. The same capsule was then compressed between two flat surfaces (i.e., a flat-ended force probe and a glass microscope slide) at a rate of 2 μm per second until the capsule ruptured. During the compression step, the probe force was continuously measured and recorded by the data acquisition system of the micromanipulator instrument.

f.) The cross-sectional area (πr ² , where r is the radius of the capsule before compression) of each of the selected capsules is calculated using the measured diameters and assuming spherical capsules. The rupture force of each selected capsule is determined from the recorded force probe measurements, as shown in Zhang, Z. et al. (1999) "Mechanical strength of single microcapsules determined by a novel micromanipulation technique." J. Microencapsulation, Vol. 16, No. 1, pp. 117-124, and Sun, G. and Zhang, Z. (2001) "Mechanical Properties of Melamine-Formaldehyde microcapsules." J. Microencapsulation, Vol. 18, No. 5, pp. 593-602.

g.) Calculate the bursting strength of each of the 30 capsules by dividing the bursting force (in Newtons) by the calculated cross-sectional area of the corresponding capsule.

h.) Calculation:

The mean bursting strength of the population was determined by averaging the bursting strength values of (at least) thirty capsules at the median/50th percentile size band.

The Δ burst strength is calculated as follows:

where FS at d _i is the FS of the capsule at the i-th percentile of the volume-weighted size distribution.

Example

The examples provided below are intended to be illustrative in nature and not intended to be limiting.

Example 1. Exemplary Synthesis of Delivery Particles

Exemplary synthesis methods for different delivery particles are provided below. Details of the materials used are provided in Table 1.

A. Description of the process for making 18 micron or 36 micron capsules - 98:2 core:wall ratio "(C:W)" and 40% IPM with CN975 .

143.12 g of perfume oil and 137.45 g of isopropyl myristate were added to a 1 L capacity water-jacketed stainless steel reactor and mixed with a high shear mixer equipped with a grinding blade under a nitrogen atmosphere. The solution was heated to 35 ° C, 0.33 g of Vazo67 (initiator) was then introduced, and the total mixture was subsequently heated to 70 ° C and maintained at this temperature for 45 minutes, and then the system was cooled to 50 ° C. Once this temperature was reached, a solution containing 63.05 g of perfume oil, 0.075 g of CD9055, 0.075 g of TBAEMA and 6.23 g of CN975 prepared separately was introduced into the reactor, and the entire mixture was mixed at 50 ° C for 10 min. Then, after stopping stirring, an aqueous phase consisting of 107 g of emulsifier (5% PVOH 540 solution), 340.03 g of RO water, 0.22 g of V-501 and 0.21 g of NaOH (21% solution) was added to the reactor. After adding the aqueous phase, grind until the particle size is reached. The emulsion is then first heated to 75°C and maintained at this temperature for 240 minutes, and then heated to 95°C and maintained for 360min, and then cooled to 25°C. At this point, the slurry is discharged from the reactor into a container to add a rheology modifier (xanthan gum 1.59 grams) and a preservative (Acticide BWS-10; 0.61 grams). The rheology modifier is mixed for 30 minutes. Finally, the preservative is added and mixed for 5 minutes to 10 minutes. The final slurry is then characterized and tested as being considered suitable.

Delivery Particle Examples 1 and 3 were synthesized substantially according to this method as described in Table 2 of Example 2 below.

Core:Wall Weight Ratio - Sample Calculation

The core:wall weight ratio is determined by dividing the weight of the total core material feed (e.g., fragrance oil and partition modifier) by the weight of the total wall material feed (e.g., wall monomer and initiator). Alternatively, the relative percentage of core material in a population of particles can be determined by dividing the weight of the total core material feed by the sum of the total weight of the core material feed plus the total weight of the wall material feed and multiplying by 100; the remaining percentage (100% core) is the relative percentage of wall material - these values can then be expressed as a ratio. Similarly, the relative percentage of wall material in a population of particles can be determined by dividing the total weight of the wall material feed by the sum of the weight of the total core material feed and the total wall material feed and multiplying by 100.

Sample calculations for "98:2" capsules formed from the examples of this section, where the core comprises fragrance oil and partition modifier (isopropyl myristate), and the wall comprises wall monomers (CN975, CD9055, and TBAEMA) and initiators (Vazo67 and V-501) are provided below.

B. Description of the method for preparing 18 or 36 micron capsules - 98:2 (C:W) and containing SR295, EB140, EB895, TMPTA, 40% IPM of SR444 or SR368

The procedure was the same as described in A except that CN975 was replaced with each of the monomers shown. The weight requirement in grams of monomer was kept constant.

Delivery Particle Examples 4 to 10, 12, 14, 16, 18 and 20 were synthesized substantially according to this method as described in Table 2 of Example 2 below.

C. Description of the method for preparing 36 micron capsules - 98:2 (C:W) and 0% IPM with CN975, SR295, EB140, EB895, TMPTA, SR444 or SR368

The process was the same as described in A or B, except that no IPM was used. For each of these examples, the use of fragrance oil replaced the need for an IPM, regardless of which monomer was used.

Delivery Particle Examples 2, 11, 13, 15, 17, 19 and 21 were synthesized substantially according to this method as described in Table 2 of Example 2 below.

D. Description of the method for making 18 micron or 36 micron capsules - 98:2 (C:W) and 40% IPM with SR295, EB140, EB895, TMPTA, SR444, SR368 and CN975, and no secondary wall monomer .

Same as A except 0.08 g CD9055 and 0.08 g TBAEMA were removed and replaced with CN975 or other monomers as indicated.

Delivery Particle Examples 25 and 26 were synthesized substantially according to this method as described in Table 2 of Example 2 below.

E. Description of the method for preparing 18 micron or 36 micron capsules - 90:10 (C:W) and 40%/0% IPM with CN975

Essentially the same as A (for those with 40% IPM) or C (for those with 0% IPM), except the weight ratio of core material to wall material was adjusted to provide a 90:10 core:polymer wall weight ratio.

Delivery Particle Examples 22 to 24 were synthesized substantially according to this method as described in Table 2 of Example 2 below.

Table 1 .

Example 2. Properties of various delivery particles

Various properties of the delivery particles synthesized according to the method described in Example 1 are provided in Table 2 below. The value of "free oil" is given as the percentage (weight %) of fragrance oil that remains unencapsulated in the slurry after capsule formation; lower free oil values indicate that the encapsulation process is more efficient (e.g., a relatively large amount of fragrance oil is encapsulated). Leakage in a heavy duty liquid (HDL) detergent product was determined after storage at 35°C for one week; the leakage values in Table 2 are provided as (%) and were determined by headspace analysis of the neat product.

Table 2 .

In addition to the data given in Table 2, the results are graphically presented in FIGS. 1 to 4 .

1 is a graph depicting the percent leakage of fragrance delivery particles prepared at 18 micron and 36 micron diameters according to the present disclosure and compared to 36 micron microcapsules using (meth)acrylate monomers of various functionalities as indicated in the absence of isopropyl myristate.

Figure 2 is a graph depicting the 1 week leakage of 18 micron and 36 micron diameter particles of (meth)acrylate monomers with various functionalities. The particles were measured dispersed in liquid laundry detergent at 35°C and the measurement was taken at 1 week. The control was the same 36 micron capsule without any isopropyl myristate.

3 is a graph depicting the percentage of the amount of free oil obtained from fragrance delivery particles prepared at 18 microns and 36 microns diameters using the indicated wall materials.

4 is a graph depicting the percent leakage by weight of delivery particles prepared at 18 microns and 36 microns diameter using various walls at 40% isopropyl myristate by weight of the core.

As shown in Table 2 and the Figures, delivery particles according to the present disclosure having preferred combinations of monomer selection, core:polymer wall weight ratio, particle size, and partitioning modifier tend to exhibit relatively low levels of leakage.

Example 3. Performance data

To compare different core:wall polymer ratios and different sized delivery particles, samples of liquid fabric enhancer (7% esterquat as softening active) were prepared with different particles. Each type of particle contained the same material as their corresponding wall polymer (primarily CN975 monomer).

The same fragrance was used in each particle type, and each core also contained about 40 wt% of a partitioning modifier (ie, isopropyl myristate). The particles were added in amounts to provide 0.158 wt% fragrance based on the weight of the fabric enhancer product composition.

Cotton Terry Tracer (in combination with a mixed fabric load) was treated with fabric enhancer in a short cotton cycle in an automatic washing machine (1200 rpm), with the fabric enhancer added during the final rinse cycle. After the fabrics were treated, an expert perfumer olfactory evaluated the fragrance intensity at the DRY and RUB contact points, and the scores at each contact point were averaged to give a score for that contact point. The scores were based on a fragrance odor intensity scale of 0 to 100, where 0 = no fragrance odor, 25 = slight fragrance odor, 50 = moderate fragrance odor, 75 = strong fragrance odor, and 100 = very strong fragrance odor. It is worth noting that internal testing showed that these advantages were not evident at wet contact points and on all fabrics. In addition, headspace data was collected above the treated fabrics using solid phase microextraction (SPME) headspace and gas chromatography mass spectrometry (GCMS).

Descriptions of the delivery particles and data results are provided below in Table 3. Group Z included delivery particles according to the present disclosure, while Group W, Group X, and Group Y included comparative particles.

Table 3 .

As shown in Table 3, delivery particles with relatively higher core:wall polymer ratios (e.g., Group X and Group Z having a C:W ratio of 98:2) generally outperformed particles with relatively lower ratios at one or both of the tested contact points.

Furthermore, by comparing the results of Group Z with the results of Group X, it is shown that delivery particles having relatively larger particle sizes (eg, 36 microns versus 18 microns) perform relatively better at the contact points shown.

Example 4. Exemplary Formulations - Liquid Fabric Enhancers

Table 4 shows exemplary formulations of compositions according to the present disclosure. Specifically, the following compositions are liquid fabric enhancer products.

Table 4 .

¹ Esterquat 1: a mixture of bis-(2-hydroxypropyl)-dimethylammonium methylsulfate fatty acid ester, (2-hydroxypropyl)-(1-methyl-2-hydroxyethyl)-dimethylammonium methylsulfate fatty acid ester and bis-(1-methyl-2-hydroxyethyl)-dimethylammonium methylsulfate fatty acid ester, wherein the fatty acid ester is prepared from a C12-C18 fatty acid mixture (REWOQUAT DIP V 20MConc, from Evonik)

² -Esterquat 2: N,N-bis(hydroxyethyl)-N,N-dimethylammonium chloride fatty acid ester, prepared from a C12-C18 fatty acid mixture (REWOQUAT CI-DEEDMAC, from Evonik)

³ Esterquat 3: Esterification product of fatty acids (C16-18 and C18 unsaturated) with triethanolamine, quaternized with dimethyl sulfate (REWOQUAT WE 18 from Evonik)

*Delivery particles according to the present disclosure, e.g., Delivery Particle Examples. #1, Table 2, Example 2 above. The "% Active" provided is the amount of fragrance delivered to the composition.

Example 5. Exemplary Formulation - Laundry Additive Granules

Table 5 shows exemplary formulations of compositions according to the present disclosure. Specifically, the following compositions are laundry detergent additive particles in the form of pastilles or "beads," such as the commercially available product sold as DOWNY UNSTOPABLES ^™ (from The Procter & Gamble Company).

Table 5 .

¹ PLURIOL E8000 (from BASF)

² Esterification products of fatty acids (C16-18 and C18 unsaturated) with triethanolamine quaternized with dimethyl sulfate (REWOQUAT WE18 from Evonik)

^{3Cationically} modified hydroxyethyl cellulose

⁴ A fragrance delivery particle according to the present disclosure, such as the population formed in Example 1 above. The % provided is the amount of aqueous slurry provided to the composition, wherein the slurry comprises about 45 wt. % of the delivery particle (core + shell).

The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values cited. Instead, unless otherwise indicated, each such dimension is intended to represent the stated value and a functionally equivalent range around that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm".

Unless expressly excluded or otherwise limited, each document cited herein, including any cross-referenced or related patent or patent application and any patent application or patent to which this application claims priority or the benefit of, is hereby incorporated by reference in its entirety. The citation of any document is not an admission that it is prior art to any of the present invention disclosed or claimed herein, or an admission that it, by itself or in combination with any one or more of the references, proposes, suggests, or discloses any such invention. In addition, to the extent that any meaning or definition of a term in this invention conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this invention shall govern.

Although specific embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications may be made without departing from the spirit and scope of the present invention. Therefore, it is intended that all such changes and modifications within the scope of the present invention be covered in the appended claims.

Claims (18)

1. A consumer product composition comprising: processing aids, and delivery of particle populations, wherein the delivery particle comprises a core and a polymeric wall surrounding the core, wherein the core comprises a benefit agent and a partition modifier, wherein the partition modifier is present in the core at a level of 5% to 55% by weight of the core, wherein the polymer wall comprises a (meth)acrylate polymer derived at least in part from one or more oil-soluble or oil-dispersible multifunctional (meth)acrylates monomer or oligomer, The one or more oil-soluble or oil-dispersible polyfunctional (meth)acrylate monomers or oligomers have at least three free-radically polymerizable functional groups, with the proviso that at least one of the free radically polymerizable groups is acrylate or methacrylate; wherein said core and said polymeric wall are present in a weight ratio of 96:4 to 99.5:0.5; and wherein the delivery particles are characterized by a volume weighted median particle size of 30 microns to 50 microns. 2. A consumer product composition according to any preceding claim, wherein said delivery particle comprises said core and said core present in a weight ratio of 97:3 to 99:1, more preferably 98:2 to 99:1. the polymer wall. 3. The consumer product composition according to any one of claims 1 or 2, wherein the one or more oil-soluble or oil-dispersible multifunctional (meth)acrylate monomers or oligomers comprise at least Four, preferably at least five, more preferably at least six, even more preferably exactly six free-radically polymerizable functional groups. 4. A consumer product composition according to any preceding claim, wherein the oil-soluble or oil-dispersible multifunctional (meth)acrylate monomer or oligomer comprises a multifunctional aromatic urethane acrylate. 5. The consumer product composition according to any preceding claim, wherein the (meth)acrylate polymer is further derived at least in part from the group consisting of amine methacrylates, acid methacrylates, or combinations thereof of monomers. 6. The consumer product composition according to any preceding claim, wherein said (meth)acrylate polymer of said polymer wall is derived from said oil-soluble or oil-dispersible multifunctional (meth) the reaction product of an acrylate, a second monomer, and a third monomer, Preferably, wherein the second monomer comprises a basic (meth)acrylate monomer, and wherein the third monomer comprises an acidic (meth)acrylate monomer. 7. A consumer product composition according to any preceding claim, wherein said polymeric wall of said delivery particle further comprises a polymeric emulsifier entrapped in said polymeric wall, Preferably, wherein said polymeric emulsifier comprises polyvinyl alcohol. 8. The consumer product composition according to any preceding claim, wherein said (meth)acrylate polymer of said polymer wall is further derived at least in part from at least one free radical initiator, Preferably, wherein said at least one free radical initiator comprises a water soluble or water dispersible free radical initiator, more preferably wherein said at least one free radical initiator comprises a water soluble or water dispersible free radical initiator and oil soluble or oil dispersible free radical initiators. 9. The consumer product composition according to claim 12, wherein the free radical initiator is present in an amount of 2% to 50%, preferably 5% to 40%, more preferably 10% to 40% by weight of the polymer wall %, even more preferably 15% to 40%, even more preferably 20% to 35%, or more preferably 20% to 30%. 10. A consumer product composition according to any preceding claim, wherein the benefit agent is a fragrance, Fragrances comprising perfume raw materials characterized by a logP of 2.5 to 4 are preferred. 11. The consumer product composition according to any preceding claim, wherein the partition modifier is selected from the group consisting of isopropyl myristate, vegetable oils, modified vegetable oils, monosodium diuretics of C4-C24 fatty acids Esters, diesters and triesters, lauryl benzophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate and mixtures thereof, Isopropyl myristate is preferred. PA230760C 12. A consumer product composition according to any preceding claim, wherein the population of delivery particles is characterized by an average burst strength of 0.2 MPa to 10 MPa, preferably 0.5 MPa to 8 MPa, more preferably 0.5 MPa to 5 MPa. 13. The consumer product composition according to any preceding claim, wherein said polymeric wall of said delivery particle further comprises a coating material, Preferably, wherein said coating material is selected from the group consisting of poly(meth)acrylates, poly(ethylene-maleic anhydride), polyamines, waxes, polyvinylpyrrolidone, polyvinylpyrrolidone copolymers, polyethylene Pyrrolidone-ethyl acrylate, polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methacrylate, polyvinylpyrrolidone/vinyl acetate, polyvinyl acetal, polyvinyl butyral, polysiloxane, polyvinyl (Propylene maleic anhydride), maleic anhydride derivatives, copolymers of maleic anhydride derivatives, polyvinyl alcohol, styrene-butadiene latex, gelatin, gum arabic, carboxymethylcellulose, carboxymethylhydroxyethyl Hydroxyethyl cellulose, other modified celluloses, sodium alginate, chitosan, casein, pectin, modified starch, polyvinyl acetal, polyvinyl butyral , polyvinyl methyl ether/maleic anhydride, polyvinylpyrrolidone and its copolymers, poly(vinylpyrrolidone/methacrylamidopropyltrimethylammonium chloride), polyvinylpyrrolidone/vinyl acetate, polyvinylpyrrolidone Copolymers of vinylpyrrolidone/dimethylaminoethylmethacrylate, polyvinylamine, polyvinylformamide, polyallylamine, polyvinylamine, and mixtures thereof. 14. The consumer product composition of any preceding claim, wherein the delivery particle is characterized by a volume weighted median particle size of from about 30 microns to about 40 microns. 15. A consumer product composition according to any preceding claim, wherein the processing aid is selected from the group consisting of surfactants, conditioning actives, deposition aids, rheology modifiers or structurants, Bleach systems, stabilizers, builders, chelants, dye transfer inhibitors, dispersants, enzymes, enzyme stabilizers, catalytic metal complexes, polymeric dispersants, clay and soil removal/anti-redeposition agents, enhancers Whitening agents, suds suppressors, silicones, toners, cosmetic dyes, net fragrances, additional fragrance delivery systems, structural elasticizers, carriers, hydrotropes, processing aids, anti-agglomerates, coatings, formaldehyde scavenger agents, pigments and their mixtures. 16. A consumer product composition according to any preceding claim, wherein said composition is a fabric care composition, a hard surface cleaner composition, a dish care composition, a hair care composition, a body cleansing composition, or mixtures thereof, Preferably a fabric care composition, Fabric care compositions are preferred as laundry detergent compositions, fabric conditioning compositions, laundry detergent additives, fabric pretreatment compositions, fabric refresher compositions or mixtures thereof. 17. A consumer product composition according to any preceding claim, wherein the composition is a liquid composition, a granular composition, a hydrocolloid, a single compartment sachet, a multi-compartment sachet, a dissolvable sheet, a lozenge or In the form of beads, fibrous products, tablets, sticks, bars, flakes, foams/mousses, non-woven sheets or mixtures thereof. 18. A method of treating a surface, wherein said method comprises the step of contacting said surface with a consumer product composition according to any preceding claim, optionally in the presence of water.

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