DE3125333A1 - "TRANSPARENT SILICONE EMULSIONS" - Google Patents

Description

Transparent silicone emulsions

The invention provides a system for emulsifying cyclic and linear polysiloxane oils to create transparent base products that are easily combined into cosmetic and medical products can be. Possible uses for transparent water-based silicone emulsions are e.g. Deodorants, antiperspirants, skin care products, hair care products, mold release agents and antiblocking agents, Fabric softeners, etc.

The method according to the invention can be used to to create clear silicone emulsions when using such emulsions are initially produced using conventional silicone emulsion technology. These conventional emulsions have usually a milky or cloudy appearance which is unsuitable for many cosmetic uses. The inventive Process can also be used to create transparent emulsions if such emulsions can be made from volatile cyclic siloxanes, such as

ORIGINAL INSPECTED

described in the parent application. Such volatile silicone emulsions enable particularly useful cosmetic and medicinal products, and the additional property of Transparency enhances their usefulness.

In the case of conventional transparent emulsions, the advantageous silicone technology has so far not been able to be used. Where possible, they were made up of very small microemulsions colloidal particles that have been emulsified in about 30% mineral oil, 30% emulsifier, and 40% water. While the Microparticles can create a measure of transparency, such microemulsions are inherently unsatisfactory as they Require inappropriately high amounts of emulsifier in order to be stable Product.

The silicone / water emulsions according to the invention are suitable .sich especially as a vehicle for applying epidermal reinforcing agents. The term "epidermal reinforcing agents" relates refer to those agents with properties that are generally considered beneficial when the agents are on parts of the body. For example, such agents encompass a wide range of cosmetics and medical as well as pharmaceutical compounds.

In the category of cosmetics there are many types of products that are beneficial to the skin in the form of a silicone emulsion can be applied. These include, for example, eyeshadow creams, bases, blushes, lip gloss, Mascara and eyeliners, opaque and wrinkle creams, moisturizers, acne concealers, and depilatories Epidermis remover etc.

Such emulsions can also be used for cleaning purposes and can take the form of shampoos, soaps, conditioning agents, and the like Accept moisturizers. In addition, ~

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NEN hair colors in a silicone / water emulsion as a carrier can be applied.

Other cosmetic uses include applying perfumes, colognes and sachets to the body. To the special useful uses would include deodorants and antiperspirants.

First among the numerous medical uses of such a carrier emulsion would be its uses as an adjuvant such as burn ointments and the use of antiseptics. It can also cause corns, warts and calluses For example, removing agents can be successfully applied to the skin in such a silicone / water carrier emulsion.

Of course, the consistency of the silicone according to the invention / Water emulsion can be varied over a wide range, from the consistency of a lotion to pastes similar to a cold cream to gel-like ointments roughly comparable to petrolatum or petroleum jelly.

The fact that these emulsions are now in a transparent form can be manufactured gives cosmetic products further commercial advantages. For cosmetic use it will usually a clear vehicle is preferred over previously available cloudy emulsions.

Silicones are synthetic polymers that are commonly made commercially from monomeric chlorosilanes and are used in Form of liquids, resins and gum resins are available. Of particular interest to the cosmetics industry are those polymers that are combined to form emulsions, fats, pastes, etc. In these compilations can a wide variety of materials along with the silicones

ORiGfNAL INSPECTED

be used.

Monomeric chlorosilanes are very reactive volatile materials that react quickly with moisture to form silicones and hydrogen chloride or hydrochloric acid react as a by-product. Therefore, in the presence of moisture, they are considered corrosive materials viewed and can have dangerous properties and must therefore be handled with care. According to her When processed into silicone polymers, however, they become mild and inert substances. Silicones can forner with others Materials to means of various end uses. ' and often the physiological effect of the finished product by the nature of the non-silicone component certainly.

The toxicological properties of silicones have been extensively studied, and so has the group of polymeric silicone fluids and resins usually have very low toxicity. Considered from a practical point of view the dangers they present are extremely small. Liquid silicone polymers have been the subject of studies on Skin irritation and sensitivity patch tests and prove typically prove to be safe. The low level of toxicity of silicone materials has even earned recognition and led to successful use as silicone fluids in medical and dental applications.

Liquid silicones generally show excellent protection against irritants from aqueous systems, such as harsh detergents and other special household cleaning agents. The chemical inertness and the excellent water-repellent properties of liquid Silicones are the main reasons they are effective in preventing dermatitis. Silicones can too act as emollients and provide a pleasant

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non-sticky "feel". Superior suntan jotions and creams can be made with silicones, since the liquid silicone is a carrier for the sunscreen and can be washed away by bathing or perspiration resists.

Emulsions containing cyclic polysiloxanes of volatile silicones were previously made using emulsifying agents Agents such as dodecylbenzenesulfonic acid, but these systems require grinding or homogenization, to emulsify the immiscible phases. Preparations of this type can only be used up to a concentration of about 55% emulsified on volatile cyclic compounds, and emulsions of this type are often used to polymerize cyclic compounds such as octamethyltetrasiloxane in the manner of an emulsion polymerization.

The parent application offers a method that makes it possible to add higher concentrations of cyclic polysiloxanes emulsify while at the same time eliminating the need for grinding or homogenizing. It also leads to stable emulsions of cyclic polysiloxanes, so that these emulsions under normal storage and use conditions usually does not "break" even when the volatile cyclic polysiloxane concentration is 80% or higher is. The invention also leads to methods for making such emulsions transparent. These are particularly useful Properties for consumer-oriented products as the Emulsions ideally can be used to advantageously epidermally strengthen the skin of a user To supply funds as a carrier.

The invention also provides a system for emulsifying volatile cyclic polysiloxanes, resulting in transparent materials which can easily be combined into numerous consumer products such as antiperspirants and deodorants, etc.

ORIGINAL INSPECTED

3Ί25333

can be provided. Other possible uses for transparent water-based cyclic compounds emulsions are skin care products such as hand lotions, skin fresheners, Hair preparations and other grooming aids. As noted above, the method according to the invention offers the possibility of selectively changing the consistency of these Emulsions depending on the end use of the product.

Another advantage lies in the fact that these are transparent Silicone / water emulsions made up of relatively volatile cyclic polysiloxane components can be so that an emulsion carrier base may evaporate from the skin and only the beneficial, epidermal reinforcing agents are left on it.

In addition, unlike the main registration, vi <-K> the advantages described above now those of linear polysiloxane base materials produced transparent emulsions are attributed.

The invention relates to optically clear silicone nuJsions with (A) a non-transparent silicone oil / water emulsion, the discontinuous phase of the emulsion being a polydiorganosiloxane oil and the continuous phase of the emulsion is water, and an emulsifying or mixture such emulsifying agent, the optical clarity of a non-transparent silicone emulsion thus formed by combining an effective amount of an optical adjusting agent which optically makes such non-transparent emulsions able to make clear, with the non-transparent emulsion is adjusted to transparency. The optically setting The agent that makes these silicone / water emulsions transparent is a water-soluble polyol or a polyether or a mixture of these materials. Particularly preferred

optical adjustment agents can be glycerine, sorbitol, polyalkyl leng Iy kol, polyoxyalkylene derivatives of propylene glycol, alkoxylated organic acids and esters, methoxypolyethylene glycol to be selected. For the purposes of the invention, the water-soluble polyol, the optical adjustment agent, also amino-functional polyether block polymers and polyethoxylated ones quaternary ammonium chlorides. Further suitable optically adjusting agents include polydiorganosiloxanes, which have been further copolymerized with any of the polyols described above.

The non-transparent silicone oil / water emulsions (A), as described above, can by known techniques with linear Polydiorganosiloxanols such as polydimethylsiloxane. These non-transparent emulsions can also be used after the techniques of the parent application with volatile cyclic Polydiorganosiloxanes are produced as a silicone oil base. After making the non-transparent silicone / A manufacturer can produce water-guest emulsions according to the invention Process stable, optically clear or transparent emulsions by combining the non-transparent emulsions with the effective amounts of the polyol type optical adjusting agent.

To the broad applicability of the invention to silicone emulsion technology To demonstrate, it should be noted that the .invention process optically clear silicone emulsions able to produce from non-transparent silicone emulsions which have been produced as described above and Use non-ionic, anionic or cationic emulsifying agents. Suitable nonionic emulsifiers include ethoxylated fatty acids, sorbitan esters, ethoxylated sorbitan esters, ethoxylated ethers and ethoxylated alkylphenols. Suitable anionic emulsifiers can be alkylbenzenesulfonic acids, salts of alkylsulfonates, salts of Alkyl sulfates and salts of the alkyl or alkylaryl ethoxylation

ORIGINAL INSPECTED

th sulfates can be selected. Specific examples of these anionic emulsifiers include dodecylbenzenesulfonic acid, Sodium Lauryl Sulphate and Polystep B-1 and B-10. Suitable cationic Emulsifiers can be selected from quaternary ammonium chlorides and polyethoxylated quaternary ammonium salts will. Specific examples of these emulsifiers are Arquad C-50, Arquad 2 S-75, Ethoquad C-25 and Ethoquad 0-25.

The agent according to the invention can also make such optically clear Silicone emulsions include epidermal reinforcing agents for cosmetic and medicinal use.

The silicone / water emulsions described above are used according to created the method according to the invention, a nontransparent silicone oil / water emulsion initially by υ in Emulsification with the emulsifiers described above according to well-known ones Emulsion techniques, such as mixing or homogenizing, whereupon the optical clarity of the non-transparent emulsion can be adjusted to an optical Form clear emulsion by applying the non-transparent emulsion with effective amounts of optical adjusting agents is brought together. These optically adjusting agents can, for example, be titrated into the non-transparent silicone emulsion until it can be seen that an optically clear emulsion has been obtained. But it can be optically adjusting Agents can also be pre-mixed into the agent to produce an optically clear silicone emulsion end product.

Stable, transparent silicone / water emulsions that search for Cosmetic or medical use can be used according to the invention be created by starting from non-transparent emulsions, made either from linear or cyclic polysiloxane liquids or oils.

Non-transparent silicone emulsions can be prepared from cyclic polysiloxane starting materials by the process of

Parent application can be established.

The emulsion starting material can be composed of 100 parts by weight of a cyclic polysiloxane or a combination of cyclic polysiloxanes Polysiloxanes of the general formula

Si-O

where η is an integer from 3 to 10, R "is CH ₃ , ^ ₉ CH ₂ CH ₂ CF ₃ , -CH ₂ = CH ₂ , ~ ^C 6 ^H 5, or combinations thereof. The polysiloxanes identified by this formula are known as volatile cyclic silicones, and this volatility property imparts beneficial properties to the emulsion. Particularly useful volatile cyclic silicones are octamethyl tetrasiloxane and decamethyl pentasiloxane.

The volatile cyclic polysiloxane becomes a silicone / water emulsion with an emulsifying agent and water combined. The order in which the ingredients are mixed is not critical, but can be particularly satisfactory Results are obtained when the emulsifying agents and the water are mixed together in a premix, to which the volatile cyclic compounds are added.

The cyclic polysiloxane is preferably added to a premix consisting of about 50 to 200 parts by weight of water, that mixed with 100 parts by weight of one or more emulsifying agents and until uniform Mixture is heated.

This premix is suitable for the production of a paste-like silicone / water emulsion, but if a more liquid one

ORIGINAL INSPECTED

or a consistency similar to a lotion is desired, the proportion of water can be up to 2000 or more parts per 100 Parts of the emulsifying agent go. The emulsifying agents can be non-ionic, anionic, cationic or amphoteric, However, those classes of non-ionic emulsifiers which are highly ethoxylated are of particular importance. The ethoxylated Offer fatty acids, ethoxylated and non-ethoxylated sorbitan esters, ethoxylated alkylphenols and ethoxylated ethers the best results for the preparation of emulsions of volatile silicones.

Examples of emulsifiers that are used to compose the inventive Silicone / water emulsions that can be used are found in the following, non-exclusive ones List:

1) ethoxylated fatty acids, such as:
Polyoxyethylene-8-stearate,
Polyoxyethylene 40 stearate,
Polyoxyethylene 50 stearate,

2) sorbitan esters, such as:
Sorbitan monolaurate,
Sorbitan monopalmitate,
Sorbitan monostearate,
Sorbitan tristearate,
Sorbitan monooleate,
Sorbitan trioleate,

3) ethoxylated sorbitan esters, such as: polyoxyethylene (20) sorbitan monolaurate, Polyoxyethylene (4) sorbitan monolaurate, polyoxyethylene (20) sorbitan monopalmitate, Polyoxyethylene (20) sorbitan monostearate, polyoxyethylene 20 sorbitan tristearate, Polyoxyethylene 20 sorbitan monooleate,

Polyoxyethylene-5-sorbitan monooleate, Polyoxyethylene 20 sorbitan trioleate,

4) ethoxylated ethers, such as: polyoxyethylene-4-lauryl ether, Polyoxyethylene-23-lauryl ether, Polyoxyethylene-20-cetyl ether, Polyoxyethylene-1O-stearyl ether, Polyoxyethylene-20-oleyl ether and

5) Ethoxylated alkylphenols, such as: (alkylphenoxy-polyoxyethylene glycol) (C ₈ H ₁₇ C ₆ H ₄ ) (OCH ₂ CH ₂ ) _n OH

CAS φ 9036-19-5
(C ₉ H ₁₉ C ₆ H ₄ ) (OCH ₂ CH ₂ ) _n OH CAS φ 26-27-38-3

About 15 to 50 parts by weight of this emulsifier / water premix is added per 100 parts by weight of the cyclic polysiloxane when a paste-like silicone / water emulsion is desirable.

Up to about 1000 parts of this premix can be added per 100 parts of the volatile, cyclic polysiloxane, to create a lotion-like, low viscosity product. By setting the various process parameters, such as the content of the volatile, cyclic polysiloxane, the emulsifying agent and the water as well as the degree of mixing, the product consistency can be influenced. The silicone / water emulsion can be in the form of a lotion and a paste or cream-like consistency and can also be viscous in the form of an ointment, a balm or of a gel can be made viscous. Each of these consistencies are of course given with the desired end use in mind of the product selected.

ORIGINAL INSPECTED

These silicone / water emulsions are used as carriers for application from 0.1 to 20,000 parts by weight of one or more epidermal strengthening agents per 100 parts of emulsion is useful.

This broad scope is intended to include products that consist of almost pure silicone / water emulsion with a small amount of epidermal reinforcing agent in it, as well also other products that contain only a small amount of silicone / water emulsion. Epidermal Reinforcing Agent refers to an additive of a cosmetic or medicinal nature that is generally considered to be beneficial It is considered to produce results when applied externally to a user's skin. The inventive Silicone / water emulsion is particularly suitable as a carrier for applying deodorizing or antiperspirant agents on the body.

The premixed water / emulsifier mixture is stirred with moderate heating until uniform Mixture prepared, whereupon the cyclic polysiloxane is added and slowly, without the need for grinding or Homogenizing, is mixed in. Grinding and homogenizing can of course be used if desired, and the term "mixing" is intended to encompass these methods as well as pure stirring. So the expression "mix" wants to be a continuous one Methods include, for example, a Werner Pfleiderer device used, in which individual streams of the components of a twin screw are metered in. Also introduce High-speed Henschel mixer, a sonic (sonolator) homogenizer with a vibrating tongue and a flat container, with a mechanical stirring turbine blade to be satisfied Results. The silicone / water emulsifier mixture is then vigorously stirred at 20 to 80 ° C until an emulsion the desired consistency is achieved. An antibacterial agent such as formalin can be added if desired will.

In a 2 liter stainless steel beaker equipped with a hot plate, a mechanical air stirrer and a thermometer, the water and the emulsifier are premixed by adding them together and heating and stirring to about 20 to 80 ° C., preferably 65 to 75 ° C. to achieve a uniform mixture when all of the solids are melted. Then, the volatile cyclic polysiloxanes octamethyltetrasiloxane or decamethylcyclopentasiloxane or a combination of these, or other may be added slowly to the aqueous premix and, preferably, vigorously stirred at about 30 to 80 C at 50 to 60 ⁰ C, until a uniform, fat-like emulsion has arisen. Once the product is uniform, a small amount of formalin can be added to prevent bacterial activity. Unlike many conventional silicone emulsions, neither colloid milling nor homogenization is required to make these emulsions, but measures can be taken if desired.

On the other hand, the starting materials can be the non-transparent Silicone / water emulsion can be produced with linear polysiloxane oils. For example, a liquid polydimethylsiloxane with trimethylsilyl chain ends with the emulsifying agents described above and water by mixing or homogenizing, or emulsifying by using a colloid mill.

In any case, the consistency of the emulsion can vary added amount of water can be controlled. With a water content of 15 to 20%, the emulsion has a fat-like consistency, however, additional water lowers the viscosity of the system to a consistency similar to that of a lotion, and it can even even more water can be used to make a low viscosity emulsion. The silicone according to the invention / Water emulsions are completely dispersible in water.

ORIGSMAL INSPECTED

Also, the consistency of the compilation can also be can be modified by the amount of polysiloxanes added. In other words, the more silicone there is, the more The emulsion is thicker and more fat-like. A low polysiloxane to water ratio gives a thinner one Emulsion.

The emulsifiers themselves influence the consistency of the product. A solid emulsifier, such as polyoxyethylene 40 stearate, makes the emulsion thicker and more fat-like, while a more liquid emulsifier makes the product similar to a lotion contributes.

A wide range of emulsion compositions can thus be seen possible by varying one of these process parameters: the concentration of the water, the cyclic Polysiloxane or the emulsifiers and the type of emulsifiers, whether solid or liquid.

The emulsions described above were generally cloudy in appearance and in fact sometimes appeared milky or cloudy cloudy-cloudy. The continuous phase of such emulsion systems is generally the aqueous phase. Hence the discontinuous phase generally a colloidal mixture of oil droplets and various selected emulsifying agents Means. It is generally well known that emulsifiers have a lipophilic moiety that is produced by the oil droplets is attracted, and have a hydrophilic part that helps keep the emulsion from breaking. The invention takes advantage of the fact that there are two different phases in these emulsion systems to create new transparent emulsions to accomplish.

The invention provides transparent emulsions by incorporating effective amounts of a class of compounds known as

optical index adjusting agents in standard silicone emulsions. These optical means are soluble in the aqueous phase of the emulsion system, whereby they change the optical environment of the colloids they contain. So you can, if such optical means use these emulsions be added slowly, the emulsion will gradually become more transparent. The addition of optical means can stop for each desired endpoint, or qualitative testing can be done to make the point most visual Determine clarity. Presumably, these optical means work by adjusting the difference of the optical ones Indices of the two discrete phases until they match, which allows transparency, but it is entirely possible that another mechanism or a combination of mechanisms is involved.

The amount of optical adjusting agent required to create a specific non-transparent silicone / water emulsion Making it transparent depends on various factors and will likely be determined on a case-by-case basis. as As a general rule, the more water there is in the continuous phase, the more water-soluble optical hiring agent will be required. Presumably in most cases at least a part and likely will be no more than 100 parts by weight of optical agent per 100 parts of nontransparent silicone emulsion are necessary. In in most cases it is relatively easy to use the optical Means to titrate on trial and error, the addition only stopping when the clear emulsion is once is reached. Once the amount of optical means required for a particular emulsion composition is known, it is relatively easy to mix the optical agent into the composition so as to make an end product more transparent Maintain shape without the need for further adjustment.

ORIGINAL INSPECTED

The optical index adjusting agents are generally used selected from a class of compounds referred to as that of the polyols. Traditionally refers the term polyol refers to alcohols with three or more hydroxyl groups. For the purposes of the present description the definition of polyols shall be expanded to cover materials that do not have three hydroxyl groups can, but are in any case highly ethoxylated, as further described below.

The optical index adjusting agents which are used in dt-in according to the invention Means and can be used in the process according to the invention are quite numerous and are as indicated above, generally described as polyols. These optical agents include the traditional polyols, like glycerin and sorbitol. Other optical agents include the polymeric glycols such as the Ucon-type polyols. Ucon is a trade name of Union Carbide Corporation for polyalkylene glycols made from random ethylene oxide / propylene oxide copolymers with a single hydroxyl group at the end of the chain. Another class of useful optical means is that of Pluronics, a trade name of the BASF-Wyandotte Corporation. These pluronics are a non-ionic Range of bifunctional block polymers with primary hydroxyl chain ends and molecular weights in the range from 1000 to over 15,000 and represent polyoxyalkylene derivatives of propylene glycol These Pluronic ™ -type polyols have two hydroxyl groups, one at each end. Other optical means include the ethoxylated organic acids or esters, such as polyethylene glycol stearate (PÄG-40 stearate). Another group of optical means are the Carbowaxe, the trade name of Union Carbide for polyethylene glycols and methoxy polyethylene glycols. The carbowaxes are generally polymers of essentially Ethylene oxide units and with two hydroxyl groups. Silicone copolymers are also used as optical means Copolymer units from the group of water-soluble

Polyols in addition to the polysiloxane units can be considered.

Two further classes of compound can be counted among the optical means. The series of Tetronics, a trade name from BASF, is a series of non-ionic polyether block polymers with amine functionality. The other group are the Ethoquads, a trade name of Armor Industrial Chemical Company, and is a range of polyethoxylated quaternary ammonium chlorides. Another The advantage of these Ethoquads lies in the fact that they not only provide transparent emulsions, but also for disinfection purposes can be used, which is particularly useful when the emulsion product is for medicinal or cosmetic use is intended.

In fact, all of these polyol materials promote the feeling of texture of silicone emulsions by increasing their moisture retention capacity. These properties are particularly useful in skin care products.

example 1

In a stainless steel container equipped with a hot plate, mechanical air stirrer and thermometer Water and selected. Given emulsifiers or mixtures. The water / emulsifier mixture is kept at 30 to 35 ° C and stirred into a uniform mixture in which all of the solids are dispersed. Then the selected cyclic polysiloxanes slowly added to the aqueous system and vigorously to form a uniform emulsion touched. After the formation of the emulsion of water and cyclic compound, an optical index adjusting one becomes Agent slowly added until a transparent silicone emulsion is obtained. In samples 1 through 4 there was glycerin or sorbitol is used as an optical index adjusting agent. The viscosity was measured with a Brookfield viscometer

ORiGfNAL INSPECTED

measured at 25 C.

sample
material 1
% 2
% 3
% 4th Octamethyl tetrasiloxane 59.0S 66.5. 61.8 56.8 Polysorbate-20 5.52 6th 3.9 6.8 Polysorbate-85 3.9 ___ PÄG-40 stearate 3.94 0.2 Sorbitan laurate 1.57 3.9 2.5 Octylphenoxy POE (7) ethanol 0.2 water 21.65 20.6 20.1 23.5 Dodecyl sodium sulfate 0.39 0.5 1.1 Ü, 6 Glycerin 7.87 6th - - - Sorbitol (70% solution) 3.9 9.8 Oleic acid 0.7 T.E.A. 0.7 _ properties Appearance lotion lotion paste Liquid viscosity 8.75 Pa-s 2.30 Pa-s 905 Pa-s 1 Pa-s

(8750 CP)

(2300 cP) (90500OcP) (UXOcP)

The consistency of the finished transparent emulsion is controlled by the choice and amount of emulsifiers used. Furthermore, an emulsion, as described for sample 2, can be homogenized without breaking the system and "oiling out" of cyclic oils.

Example 2

Transparent emulsions with linear siloxanes as the base oil were obtained as follows: The selected emulsifiers and Siloxane oil are stored without water in a stainless steel container equipped with a heating plate, stirrer and thermometer, mixed. The emulsifier / oil mixture is stirred and heated to 40 to 50.degree. Then some of the water is added, to form a thick premix. In sample 8 only, some of the glycerine was also added to the premix. The premix is then ground by a colloid mill under pressure to give a stiff, fat-like paste. The pressure in the colloid mill was about 1.4 bar (20 psi). The pressure depends entirely on the paste viscosity and is a flexible process parameter. Pressures of 0.35 to 2.1 bar (5 to 30 psi) would not appear unreasonable to those skilled in the art. aside from that a homogenizer can be used instead of the colloid mill. The fat-like paste is then mixed with the rest Diluted water, which may contain a bactericidal agent if necessary. After the paste is dispersed in the water, the optical index adjusting agent is added slowly to give a clear, transparent emulsion.

sample

material

Dimethylpolysiloxane oil
(1 cm / s or 10OcSt) 21.43 21.43 54.4 71.96 Dimethylpolysiloxane oil
(3.5oti ² / s or 35OcSt) 21.43 21.43 ——— —— Trimethylnonyl polyethylene
glycol ether 0.91 1.04 - ——- Octylphenoxypolyethoxyethanol 0.91 1.04 - Polysorbate 80 3.9 4.6 Sorbitan laurate 0.8 Ο, Θ6 Dodecyl sodium sulfate 0.36 ' 0.29 water 26.28 26.03 18.7 13.32 Alkylaryl polyether sulfonate,
Na-SaIz
Formalin
Sodium benzoate 0.36
0.07
0.036 0.07
0.036 Glycerin 28,574 28,564 8.97 Sorbitol solution (70%) 22.2 properties Appearance fluid fluid fluid fat viscosity 0.139 Pa-s 0.69 OPa-S 1.56OPa-S 36 Pa-:

(139 cp) (690 CP)

(1560 cP) (3600OcP)

Be i sp_io_L 3

100 g of an emulsion-polymerized silicone emulsion was by mixing sufficient amounts of water with octamethylcyclotetrasiloxane and an anionic surfactant, dodecylbenzenesulfonic acid, manufactured. The mixture was then homogenized into an emulsion. The polymerization takes place by heating above about 75 ° C for about 2 to 3 hours. After cooling, the polymer reaches a desired final molecular weight into equilibrium, and usually the polymer can be neutralized with an amine, such as triethanolamine will. 50 g of Pluronic L-101 were added to 100 g of this emulsion given, which after mixing resulted in a stable, transparent S i 1 icon emulsion lotion.

Example 4

A transparent silicone emulsion lotion was made with a silicone copolymer as an optical adjusting agent manufactured. A 35% silicone emulsion became a

2
Dimethyl silicone oil prepared at 600 cm / s (60,000 cSt) using a mixture of alkylarylpolyethoxylxerter emulsifying agents. A combination of optically adjusting agents prepared from 50 g of polysorbate-20 and 20 g of a silicone copolymer was added to 100 g of this mixture. The silicone copolymer had the general formula M ¹ ^ ₂₀ T, where M ^{1 was} (CH ₃ J ₂ O ₀ 5Si-CH ₂ CH ₂ CH ₂ COOH, D (CH ₃ J ₂ -SiO and T CHoSiO _{1 ς} , and it was esterified with a mixture consisting of Ucon 50 HB 2000 and Ucon 50 HB 660.

Example 5

A hard, transparent fat was made by combining 64% by weight decamethylpentasiloxane with 10% polysorbate- * 80 and 5% PÄG-40 atearate. These ingredients were mixed with moderate heating until they were all melted and a uniform mixture was obtained, whereupon

ORIGINAL INSPECTED

a solution of 20 wt .-% water and 1% dodecyl sodium sulfate (based on the weight of the total mixture) dem previous mixture was added. A hard, clear fat emulsion was obtained after mixing. In this example PÄG-40 stearate was used as the optical adjusting agent and it can be seen that the order of addition of the optical means does not affect the end product.

Example 6

A clear amber silicone emulsion lotion was made by mixing 57 wt% octamethyltetrasiloxane obtained with 7% by weight polysorbate-20 and 2.6% sorbitan laurate. This mixture was made with 0.5% dodecyl sodium sulfate. and 23.5% water were added. Then the optical adjusting agent was made up of 9.3% sorbitol solution (i.e. 70% sorbitol in Water) was added to the mixture and mixed until the clear amber lotion was obtained.

Example 7

A non-transparent silicone emulsion suitable for use as a cosmetic cream was first used as follows Manufactured: To 37 parts by weight Polydimuthylsi.Joxunö I mil a viscosity of 0.1 Pa · s (100 cP) became 2.6 parts Polysorbate-80, 0.5 part sorbitan laurate, 0.1 part sodium benzoate, 33 parts of water and 0.05 part of Givgard DXN, a bactericide, were added. These ingredients became one non-transparent cream emulsion mixed by adding 26 parts (based on the weight of the total mixture) an optical adjusting agent, an ethylene oxide / propylene oxide polyether (Ucon 50-HB-2OOO) with Ucon-Butoxy beginning and Hydroxy1 ends, made transparent. The finished transparent cream had a viscosity of 55 Pa-s (55,000 cP).

BATH ORIGINAL

Claims (24)

Claims 1. Process for making optically clear silicone emulsions made of non-transparent silicone emulsions, characterized by Emulsification (A) of a non-transparent silicone oil / water emulsion by combining a discontinuous phase of polydiorganosiloxane oil with a continuous water phase and one emulsifying agent or a mixture of emulsifying agents and Adjusting the optical clarity of the non-transparent emulsion by combining the non-transparent emulsion with (B) an effective one Amount of an optical adjusting agent from the group of water-soluble polyols or polyethers, the able to make the non-transparent emulsion optically clear. 2. The method according to claim 1, characterized in that that al.s, polydiorganosiloxane oil uses polydimethylsiloxane will. 3. The method according to claim 1 or 2, characterized in that the emulsifying agent is a non-ionic Emulsifier from the group of ethoxylated fatty acids, sorbitan esters, ethoxylated sorbitan esters, ethoxylated ethers and ethoxylated alkylphenols is used. 4. The method according to claim 1 or 2, characterized in that an anionic emulsifying agent Emulsifier from the group of the alkylbenzenesulfonic acids, the salts of the alkylbenzenesulfonates, the salts of the alkyl sulfates and the salts of the alkyl or alkylaryl ethoxylated sulfates is used. 5. The method according to claim 1 or 2, characterized in that that the emulsifying agent is a cationic emulsifier from the group of quaternary ammonium chlorides and polyethoxylated quaternary ammonium salts is used. 6. The method according to any one of the preceding claims, characterized in that the optically adjusting agent from the group of glycerol, sorbitol, polyalkylene glycol, the polyoxyalkylene derivatives of propylene glycol, ethoxylated organic acids and esters, methoxypolyethylene glycol, amine-functional polyether block polymers and polyethoxylated quaternary ammonium chloride is selected. 7. The method according to claim 6, characterized in that the optically adjusting agent further with a polydiorganosiloxane is copolymerized. 8. The method according to any one of the preceding claims, characterized in that the optically adjusting agent in an amount of 1 to 100 parts by weight per 100 Ge INSPECTED parts by weight silicone / water emulsion is used. 9. The method according to claim 2, characterized in that the non-transparent silicone oil / water emulsion from volatile, cyclic polydiorganosiloxanes is derived. 10. The method according to claim 2, characterized in that that the non-transparent silicone oil / water emulsion is derived from linear polydiorganosiloxane. 11. The method according to any one of the preceding claims, characterized in that the optically clear silicone emulsion an epidermal strengthening agent is also added. 12. The method according to claim 11, characterized in that that the epidermal strengthening agent is selected from cosmetic and medicinal agents. 13. Optically clear silicone emulsion with (A) a non-transparent silicone oil / water emulsion, consisting of a discontinuous one Phase of polydioiganosiloxane oil, a continuous water phase and a emulsifying agents or a mixture of emulsifying agents, and (B) an effective amount of an optical adjusting agent selected from water-soluble ones Polyols or polyethers that can make the non-transparent emulsion optically clear. 14. Emulsion according to claim 13, characterized by polydimethylsiloxane as polydiorganosiloxane oil. 15. Emulsion according to claim 13, characterized in that that the emulsifying agent is a non-ionic emulsifier selected from ethoxylated fatty acids, sorbitan esters, ethoxylated sorbitan esters, ethoxylated ethers and ethoxylated alkylphenols. 16. Emulsion according to claim 13, characterized in that that the emulsifying agent is an anionic emulsifier selected from alkylbenzenesulfonic acids, salts of alkylbenzenesulfonates, Salts of the alkyl sulfonates and salts of the alkyl or alkylaryl ethoxylated sulfates. 17. Emulsion according to claim 13, characterized in that that the emulsifying agent is a cationic emulsifier selected from quaternary ammonium chlorides and polyethoxylated quaternary ammonium salts. 18. Emulsion according to claim 13, characterized in that the optically adjusting agent is selected from glycerol, sorbitol, Polyalkylene glycol, polyoxyalkylene derivatives of propylene glycol, ethoxylated organic acids and esters, methoxypolyethylene glycol, amine-functional polyether block polymers and polymethoxylated quaternary ammonium chloride. 19. Emulsion according to claim 18, characterized in that that the optically adjusting agent with a polydiorganosiloxane is further copolymerized. 20. Emulsion according to claim 13, characterized in that the optically adjusting agent in an amount of 1 to 100 parts by weight per 100 parts by weight of silicone / water emulsion is used. INSPECTED 21. Emulsion according to claim 14, characterized in that the non-transparent silicone oil / water emulsion from volatile, cyclic polydiorganosiloxanes derived. 22. Emulsion according to claim 14, characterized in that the non-transparent silicone oil / water emulsion from linear polydiorganosiloxane. 23. Emulsion according to claim 13, characterized in that that it further comprises an epidermal strengthening agent. 24. Emulsion according to claim 23, characterized in that the epidermal reinforcing agent among cosmetic and medical means is selected.