WO2025071300A1 - Two-phase composition comprising diphenyl dimethicone and rosinate oil - Google Patents

Abstract

The present invention relates to a two-phase composition comprising diphenyl dimethicone and a rosinate oil. The present invention, by using arylated silicone having a specific gravity of 1.0 or greater and a rosinate-based oil, enables oil dispersion-aggregation to be stably reproduced at an appropriate rate in a two-phase formulation in which the oil sinks in an aqueous phase.

Description

A two-phase composition comprising diphenyl dimethicone and rosinate oil

The present invention relates to a two-phase composition comprising diphenyl dimethicone and rosinate oil.

As clean beauty becomes a trend, demand for formulations with minimal ingredients and less risk of irritation is increasing. Consumers are paying attention to all the ingredients of cosmetics before making a purchase decision, and are persuaded by the phrase “made with mild ingredients.” In response, cosmetics marketing is also pursuing clean orientation such as harmlessness, low or no irritation, absence of harmful ingredients, and inclusion of natural ingredients rather than just emphasizing effectiveness.

Emulsifiers are a type of surfactant, and are essential ingredients added to stabilize cosmetics, which are mixtures of water and oil. The molecular structure of surfactants consists of hydrophilic and lipophilic groups, and therefore function to allow water and oil to mix. These emulsifiers are widely used not only in cosmetics, but also in foods, medicines, and daily necessities.

Emulsifiers can be divided into PEG (polyethylene glycol) and silicone types based on their structure, and can be divided into natural and synthetic types based on their origin. Among them, concerns are growing about the safety of using PEG-based emulsifiers because carcinogens 1,4-dioxane and ethylene oxide can remain with the emulsifier during the synthesis process. In addition to concerns about residual harmful substances, emulsifier reduction prescriptions are needed in line with the trend of pursuing only the minimum ingredients essential for skin care.

Meanwhile, the two-layer formulation has a differentiated appearance in which the oil layer is floated on a non-viscous water layer, and then oil droplets are formed when mixed and used. This two-layer formulation can provide both oil and moisture to the skin without including surfactants that have high hazard concerns. In addition, since there is no need to stabilize the emulsified state, there is no need to include polymers used for this purpose, so there is an advantage in that it can realize a more refreshing feeling of use.

However, in the case of a two-layer formulation, since the density of the oil contained in the oil layer is lower than that of the water layer, most formulations have the oil layer located higher than the water layer, and most of these formulations feel more moisturizing than nourishing when used.

Accordingly, interest is increasing in the development of cosmetic compositions in which the oil layer can be positioned lower than the aqueous layer, breaking away from the typical framework of existing two-layer formulations in which the oil layer is positioned higher than the aqueous layer.

The present invention relates to a two-phase cosmetic composition, and provides a two-phase composition comprising an arylated silicone having a specific gravity of 1.0 or more and a rosinate oil. Through this, a method for reproducing dispersion-association of oil at an appropriate speed and stably in a two-phase formulation in which an oil phase is settled in an aqueous phase is provided.

The present invention relates to an oil phase comprising an arylated silicone and a rosinate oil having a specific gravity of 1.0 or greater; and

Including awards,

A two-phase cosmetic composition having two phases, a water phase and a liquid phase, and an emulsified phase when shaken or stirred is provided.

In the present invention, by appropriately controlling the difference in specific gravity between the water phase and the oil phase, a two-phase cosmetic composition can be provided which has a shape in which oil settles in the water phase when stationary, and which has excellent shape retention even when dispersion and mixing are repeated.

In addition, by using a combination of arylated silicone and rosinate oil having a specific gravity of 1.0 or higher, dispersion and association of oil in a two-phase cosmetic composition can be reproduced at an appropriate speed and stably.

In addition, by optimizing the components and their contents within the composition, excellent stability and appearance suspension can be achieved.

In addition, the two-phase cosmetic composition can attract the attention of consumers by having a unique appearance in which oil settles within the water phase, and can provide a high level of nutrition by using an oil phase with a higher density than the water phase.

Figures 1a and 1b show images of compositions according to the content of the electrolyte manufactured in Experimental Example 1.

Figure 2 shows images of compositions according to the type of surfactant manufactured in Experimental Example 2.

Figures 3a to 3b, Figures 4 and 5 show images of compositions according to the content ratio of arylated silicone and rosinate-based oil manufactured in Experimental Example 3.

The present invention relates to an oil phase comprising an arylated silicone and a rosinate oil having a specific gravity of 1.0 or greater; and

Including awards,

The present invention relates to a two-phase cosmetic composition having two phases, a water phase and a liquid phase, and an emulsified phase when shaken or stirred.

Hereinafter, the two-phase cosmetic composition of the present invention will be described in more detail.

In the present invention, numerical values are limited to above and below or over and below, but unless otherwise specified, they represent above and below.

In the present invention, a two-phase cosmetic composition means a composition comprising or consisting of two phases, an aqueous phase and an oil phase, or an oil phase and an emulsified phase, which are visually and/or macroscopically separated when placed in a container.

Here, the term "water phase" means a phase that is liquid at room temperature, including or consisting of a hydrophilic, water-soluble, or water-dispersible substance, and the term "oil phase" means a phase that is liquid at room temperature, including or consisting of a lipophilic, oil-soluble, or oil-dispersible substance.

In one specific embodiment, the two-phase cosmetic composition of the present invention has two phases, an aqueous phase and an oil phase, when stationary, and may have a shape in which oil settles in the aqueous phase. The "shape in which oil settles in the aqueous phase" may mean a structure of two separate layers in which an oil phase layer is located at the bottom of an aqueous phase layer, or may mean a structure in which a spherical oil phase settles under the aqueous phase. Here, "spherical" does not mean a shape of a mathematically perfect sphere, but may also include a shape in which a projection image is identical to or similar to a circle or an ellipse. The spherical oil phase existing under the aqueous phase may be one or more, and preferably, it may be one.

In one specific embodiment, the two-phase cosmetic composition can realize an emulsified phase when shaken or stirred. Specifically, when the two-phase cosmetic composition is shaken or stirred, the oil phase can be dispersed into several small oil droplets. Then, after a certain period of time, the oil phase can be combined again into the original spherical large oil phase droplets.

In the present invention, the speed at which the oil phase dispersed into multiple droplets is converted into the original large oil phase droplets can be expressed as the coalescence speed. The coalescence speed of the two-phase cosmetic composition of the present invention can be 60 minutes or less, 30 minutes or less, 20 minutes or less, or 10 minutes or less.

The two-phase cosmetic composition of the present invention may not contain a surfactant, or the content of the surfactant may be less than 0.03 wt%, 0.01 wt% or less, 0.001 wt% or less, or 0.0001 wt% or less, based on 100 wt% of the total composition. Through this, the speed of unification can be increased quickly, and clean directionality can be pursued. In addition, since the polymer component included for emulsion stability does not have to be included, a refreshing feeling of use can be provided.

The two-phase cosmetic composition of the present invention comprises an oil phase and an aqueous phase.

In one specific embodiment, the water phase and the oil phase have a difference in specific gravity, and the specific gravity of the oil phase may be higher than that of the water phase. This allows for the implementation of an appearance in which the oil phase (oil) settles in the water phase, which can attract the attention of consumers and provide a high nutritional value. In addition, the greater the difference in specific gravity between the water phase and the oil phase, the more advantageous it may be for the repetition of dispersion and association of the formulation. When a solute is added to the water phase of the cosmetic composition, most of the solute contributes to an increase in specific gravity, so it is necessary to appropriately control the allowable content of each component (or combination) included in the water phase. The difference in specific gravity between the water phase and the oil phase may be, for example, 0.001 to 0.50, 0.002 to 0.40, 0.005 to 0.30, or 0.01 to 0.20.

In the present invention, the oil may include arylated silicone and rosinate oil having a specific gravity of 1.0 or more.

In one specific embodiment, the oil phase may be present in an amount of 5 to 25 wt%, 5 to 20 wt%, 5 to 14 wt% or 10 to 20 wt% relative to 100 wt% of the total composition. A two-phase formulation can be achieved within the above content range.

In the present invention, the arylated silicone may have a high specific gravity of 1.0 or more, through which a two-phase formulation, specifically a shape in which an oil phase (oil) settles in an aqueous phase, can be implemented. When the specific gravity is less than 1.0, it is difficult to implement the shape of a two-phase formulation.

In one specific example, the arylated silicone may be at least one selected from the group consisting of diphenyl dimethicone, phenyl methicone, phenyl trimethicone, diphenylsiloxy phenyl trimethicone, tetramethyl tetraphenyl trisiloxane, triphenyl trimethicone, tetramethyl tetraphenyl trisiloxane, and trimethyl pentaphenyl trisiloxane, and specifically, diphenyl dimethicone may be used.

In one specific example, the content of the arylated silicone may be 3 to 20 wt%, 5 to 15 wt%, or 5 to 10 wt% relative to 100 wt% of the total composition. In the above content range, the oil phase may be formed into a spherical shape and have a sedimentation effect.

In one specific embodiment, the content of arylated silicone can be greater than 10 wt%, greater than 20 wt%, or greater than 50 wt% of the oil phase, and the upper limit can be less than 100 wt%, less than 99 wt%, or less than 90 wt%.

In the present invention, the rosinate-based oil can promote the combination of oil phases in a two-phase formulation, thereby strengthening the coagulation of the oil. That is, since the rosinate-based oil has a strong tendency to coagulate with each other, a large spherical oil phase can be implemented through the use of the rosinate-based oil.

In one specific embodiment, the rosinate oil is selected from the group consisting of methyl hydrogenated rosinate, glycol rosinate, dipentaerythrityl hexahydroxystearate/hexastearate/hexahydrogenated rosinate, glyceryl dibehenate/hydrogenated rosinate, glyceryl dimyristate/hydrogenated rosinate, triethylene glycol hydrogenated rosinate, triethylene glycol rosinate, diethylene glycol rosinate, methyl rosinate, pentaerythrityl hydrogenated rosinate, pentaerythrityl rosinate, dimer dilinoleyl hydrogenated rosinate, glyceryl hydrogenated rosinate, glyceryl tri-hydrogenated rosinate, glyceryl rosinate and One or more selected from the group consisting of glyceryl diisostearate/hydrogenated rosinate can be used, and specifically, methyl hydrogenated rosinate can be used.

In one specific example, the content of the rosinate-based oil may be 0.1 to 10 wt%, 0.5 to 10 wt%, or 1 to 5 wt% relative to 100 wt% of the total composition. As the content of the oil increases, the stickiness becomes stronger, so if the content exceeds the above-mentioned range, there is a concern that the stickiness may be excessive, the spherical shape may collapse, and the oil may not be dispersed at all.

Additionally, the content of the rosinate oil may be less than 90 wt%, 80 wt% or less, or 50 wt% or less of the oil phase, and the lower limit may be more than 0 wt%, 1 wt% or more, or 10 wt% or more.

In one specific example, the oil phase may use any component used in the oil phase of the cosmetic composition without limitation, as long as it does not change the shape of the two-phase formulation, in addition to the aforementioned components.

In the present invention, the water may include purified water.

In one specific embodiment, the amount of the award can be from 75 to 95 wt %, from 80 to 95 wt %, from 84 to 95 wt % or from 80 to 90 wt % relative to 100 wt % of the total composition.

In the present invention, the water may additionally contain an electrolyte. The electrolyte may be an ionic compound, and the ionic compound may be a water-soluble salt in which cations and anions involved in salt formation meet and are combined. This electrolyte may promote salting-out of the oil, so that the oil may coalesce in a short period of time.

The above salting-out phenomenon is based on the principle that when an electrolyte with a high charge density is dissolved in water, an electrical repulsion force occurs between charges, and at the same time, the hydrophobic effect increases, promoting the coagulation of oil droplets. Through this, the dispersed oil can be rapidly unified.

In one specific example, the electrolyte may be at least one selected _{from the} group consisting of sodium chloride (NaCl), sodium sulfate (Na ₂ SO ₄ ), sodium carbonate (Na ₂ CO ₃ ), potassium chloride (KCl), potassium sulfate (K ₂ SO ₄ ), potassium carbonate (K 2 CO ₃ ), magnesium chloride (MgCl ₂ ), calcium chloride (CaCl 2 ), calcium carbonate (CaCO ₃ ), and magnesium sulfate (MgSO ₄ ).

In one specific example, the content of the electrolyte may be less than 3 wt%, 0.01 to 2.5 wt%, 0.02 to 2 wt%, 0.05 to 1.5 wt%, or 0.1 to 1 wt%, relative to 100 wt% of the total composition. If the electrolyte is used in excessive amounts, there is a concern that the specific gravity difference may be reversed and the oil phase may float to the top.

In the present invention, the water-soluble polymer may additionally include a polyol. The polyol includes a hydroxyl group in its structure, and the hydroxyl group can enable faster separation from oil through its ability to bind water.

In one specific example, the polyol may be a substance having two or more -OH groups bonded in the molecular structure, and for example, at least one selected from the group consisting of glycerin, dipropylene glycol, 1,3-butylene glycol, 2-3-butylene glycol, pentylene glycol, 1,2-hexanediol, caprylyl glycol, propanediol, and propylene glycol may be used, and specifically, pentylene glycol may be used.

In one specific example, the content of the polyol may be 0.1 to 10 wt%, 0.1 to 5 wt%, or 0.5 to 5 wt% relative to 100 wt% of the entire composition. The polyol may be included within the above-mentioned range, taking into account the effect of the appearance becoming opaque and the effect of the increase or decrease in specific gravity depending on the polyol properties.

In addition, the two-phase cosmetic composition of the present invention may additionally contain, in addition to the above-described components, at least one selected from the group consisting of oil components, moisturizers, polymer raw materials, sugars, antioxidants, buffers, various extracts, preservatives, pigments or fragrances that are commonly incorporated in cosmetics, within a range that does not impair the effects of the present invention.

Hereinafter, the present invention will be described in detail through examples. The following examples are only intended to illustrate the present invention, and the scope of the present invention is not limited to the following examples. These examples are provided to ensure that the disclosure of the present invention is complete, and to fully inform those skilled in the art of the invention of the scope of the invention, and the present invention is defined only by the scope of the claims.

Example

Experimental Example 1. Setting the electrolyte content

The electrolyte content was selected to promote unification while preventing the specific gravity values between the oil and water phases from being reversed.

A composition containing an electrolyte (MgSO ₄ ) was prepared with the composition and content shown in Table 1 below.

The manufacturing method is as follows.

1. ‘A’ was completely dissolved at room temperature.

2. In 1, ‘Na’ was inserted into the dissolved ‘A’.

Manufacturing Example 1-1 Manufacturing Example 1-2 Manufacturing Example 1-3 Manufacturing Example 1-4 Manufacturing Example 1-5 Manufacturing Example 1-6 go Purified water To 100 To 100 To 100 To 100 To 100 To 100 1,2-Hexanediol 1.5 1.5 1.5 1.5 1.5 1.5 Magnesium sulfate 0 0.1 0.5 1 2 3 me Diphenyl
Dimethicone 10 10 10 10 10 10

The results were confirmed as follows.

1. First, the composition was placed in a vial and shaken simultaneously with similar force and number of times.

2. Then, the vial was placed on a flat surface and the time required for coalescence (oil coalescence speed) was measured.

The appearance of the implementation after 30 minutes of performing 1 was classified as follows.

◎: Unite into one large sphere

O: One large sphere and several small spheres of oil are distributed

X: Not merged

Additionally, the oil fusion rate was classified as follows:

◎: Unification completed within 10 minutes

○: Unification completed within 30 minutes

X: Not merged after 8 hours

The measurement results are shown in Fig. 1a, Fig. 1b and Table 2.

Manufacturing Example 1-1 Manufacturing Example 1-2 Manufacturing Example 1-3 Manufacturing Example 1-4 Manufacturing Example 1-5 Manufacturing Example 1-6 Implementing the appearance X ◎ ◎ ◎ ◎ X Oil fusion speed X O O O O ◎

Fig. 1a shows the case where the oil settles as it is dispersed (left, Manufacturing Example 1-1) and the case where it is united (right, Manufacturing Example 1-4), and Fig. 1b shows the case where the salt concentration does not cause an inversion of the specific gravity value (left, Manufacturing Example 1-4) and the case where it causes an inversion of the specific gravity value (right, Manufacturing Example 1-6). In this case, in the case of Fig. 1b, a coloring raw material is included in the composition, but the coloring raw material does not affect the uniting.

As shown in FIG. 1a, FIG. 1b and Table 2, in the absence of electrolyte (MgSO ₄ ) (Manufacturing Example 1-1), the oil phase does not maintain a spherical shape and the oil disperses and settles without coalescence, whereas in the case of an excess concentration of 3% or more (Manufacturing Example 1-6), the specific gravity difference is reversed, preventing the oil phase from settling and causing it to float to the top.

Through Experimental Example 1, since oil tends to settle due to its high specific gravity, the electrolyte concentration was selected to be approximately 1%, which is the electrolyte concentration that can stably maintain the specific gravity difference between the oil phase and the water phase even when salt is added to the water phase.

Experimental Example 2. Appearance Evaluation by Using Surfactant

A composition containing a surfactant was prepared with the composition and content shown in Table 3 below.

ingredient Manufacturing Example 2-1 Manufacturing Example 2-2 Manufacturing Example 2-3 Manufacturing Example 2-4 Purified water To 100 1,2-Hexanediol 1 Surfactant PEG-60
Hydrogenated
Castor oil 0.03 Polysorbate 60 0.03 Octyldodeces-16 0.03 PEG-40 Hydrogenated
Castor oil 0.03 Diphenyl dimethicone 10

Figure 2 shows images of compositions according to the type of surfactant manufactured in Experimental Example 2.

As shown in Fig. 2, it can be confirmed that the composition undergoes some emulsification/solubilization, and the formulation is overall suspended and not restored to a spherical oil. That is, regardless of the type of surfactant, it can be confirmed that the oil is not restored to a spherical shape after shaking, and both the water phase and the oil phase are suspended.

Experimental Example 3. Preparation of a two-phase cosmetic composition

It was confirmed through an experimental example that when a rosinate-based oil is further included in an oil phase containing arylated silicone, the rate at which the dispersed oil coalesces is improved.

Specifically, a composition was prepared with the composition and content shown in Table 4 below, and then the appearance was evaluated according to the method of Experimental Example 1.

Comparative Example 1 Example 1 Example 2 Example 3 Comparative Example 2 Purified water To 100 To 100 To 100 To 100 To 100 Magnesium sulfate 1 1 1 1 1 Pentylene glycol 2.5 2.5 2.5 2.5 2.5 1,2-Hexanediol 1 1 1 1 1 glycerin 0.5 0.5 0.5 0.5 0.5 Ethanol 3.5 3.5 3.5 3.5 3.5 Diphenyl dimethicone 10 9 8 5 1 Methyl hydrogenated rosinate 0 1 2 5 9 Coloring raw materials Moderate amount Moderate amount Moderate amount Moderate amount Moderate amount

FIGS. 3a to 3b, FIGS. 4 and 5 show images of compositions according to the content ratio of arylated silicone and rosinate-based oil manufactured in Experimental Example 3. Specifically, FIG. 3a shows an image immediately after shaking the composition, FIG. 3b shows an image 10 minutes after shaking the composition, and FIG. 3c shows an image 30 minutes after shaking the composition.

As shown in Figure 3, it can be confirmed that Examples 1 to 3 containing diphenyl dimethicone and methyl hydrogenated rosinate in the oil phase have a faster coalescence rate of the oil phase after dispersion than Comparative Example 1 not containing methyl hydrogenated rosinate.

In particular, Fig. 4 is an image taken 30 minutes after shaking the composition manufactured in Example 2, and it can be confirmed that rapid unification occurs after dispersion.

In addition, Fig. 5 is an image of the composition manufactured in Comparative Example 2 immediately after shaking, and it can be confirmed that when methyl hydrogenated ditroginate is included at 90% of the total weight of the oil phase, the viscosity of the oil phase becomes excessively high and dispersion is not proper. This is not desirable in terms of appearance, and it can be confirmed that a lower content of rosinate-based oil should be included.

In the present invention, by appropriately controlling the difference in specific gravity between the water phase and the oil phase, a two-phase cosmetic composition can be provided which has a shape in which oil settles in the water phase when stationary, and which has excellent shape retention even when dispersion and mixing are repeated.

Claims (9)

Oil phase comprising arylated silicone and rosinate oil having a specific gravity of 1.0 or more; and Including awards, A two-phase cosmetic composition having two phases, a water phase and a liquid phase, and an emulsified phase when shaken or stirred. In paragraph 1, A two-phase cosmetic composition which does not contain a surfactant or has a content of the surfactant of less than 0.03 wt% based on the total weight of the composition. In paragraph 1, The amount of the oil is 5 to 25 wt% based on the total weight of the composition, A two-phase cosmetic composition wherein the amount of the active ingredient is 75 to 95 wt% based on the total weight of the composition. In paragraph 1, A two-phase cosmetic composition, wherein the arylated silicone having a specific gravity of 1.0 or greater is at least one selected from the group consisting of diphenyl dimethicone, phenyl methicone, phenyl trimethicone, diphenylsiloxy phenyl trimethicone, tetramethyl tetraphenyl trisiloxane, triphenyl trimethicone, tetramethyl tetraphenyl trisiloxane, and trimethyl pentaphenyl trisiloxane. In paragraph 1, A two-phase cosmetic composition wherein the content of arylated silicone having a specific gravity of 1.0 or greater is 3 to 20 wt% based on the total weight of the composition. In paragraph 1, Rosinate oils include methyl hydrogenated rosinate, glycol rosinate, dipentaerythrityl hexahydroxystearate/hexastearate/hexahydrogenated rosinate, glyceryl dibehenate/hydrogenated rosinate, glyceryl dimyristate/hydrogenated rosinate, triethylene glycol hydrogenated rosinate, triethylene glycol rosinate, diethylene glycol rosinate, methyl rosinate, pentaerythrityl hydrogenated rosinate, pentaerythrityl rosinate, dimer dilinoleyl hydrogenated rosinate, glyceryl hydrogenated rosinate, glyceryl tri-hydrogenated rosinate, glyceryl rosinate and A two-phase cosmetic composition comprising at least one selected from the group consisting of glyceryl diisostearate/hydrogenated rosinate. In paragraph 1, A two-phase cosmetic composition wherein the content of rosinate oil is 0.1 to 10 wt% based on the total weight of the composition. In paragraph 1, Further comprising at _least one electrolyte selected from the group consisting of sodium chloride (NaCl), sodium sulfate (Na ₂ SO ₄ ), sodium carbonate (Na ₂ CO ₃ ), potassium chloride (KCl), potassium sulfate (K ₂ SO ₄ ), potassium carbonate (K _{2 CO 3 )} , magnesium chloride (MgCl ₂ ), calcium chloride (CaCl _{2 ), calcium carbonate (CaCO 3} ), and magnesium sulfate (MgSO ₄ ). A two-phase cosmetic composition wherein the content of the electrolyte is less than 3 wt% based on the total weight of the composition. In paragraph 1, In addition, polyol is included, A two-phase cosmetic composition wherein the content of the polyol is 0.1 to 10 wt% based on the total weight of the composition.

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