DE3045083A1 - SILICONE / WATER EMULSIONS, METHOD FOR THEIR PRODUCTION AND THEIR USE - Google Patents

Description

Silicone / water emulsions, process too their manufacture and use

The invention discloses means and methods for producing stable silicone / water emulsions of volatile, cyclic ones Polysiloxanes without the need for grinding or homogenization, especially for cosmetic and medical applications Applications are useful.

The silicone / water emulsion according to the invention is suitable particularly good as a carrier for products that strengthen the epidermis. The phrase "fortifying the epidermis Agents "refers to those agents having properties generally considered beneficial when they have been applied to parts of the body. For example, such agents encompass a wide range of cosmetics and medical and pharmaceutical compositions.

In the cosmetics industry, there are many types of products that, on Applied to the skin in the form of a silicone emulsion, can be beneficial. For example, such cosmetics include Eyeshadow cream, basics, blushes, lip shine, mascara and eyeliner, concealer and peel creams, Moisturizers, means for masking acne, depilatory

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medium and epidermis or cuticle remover etc.

Such emulsions can also be used for cleaning purposes and take the form of shampoos, soaps, conditioning agents, and moisturizers. Also can Hair dye in a silicone / water emulsion can be used as a carrier.

Other cosmetic uses include perfumes, Colognes and body sachets. Particularly useful applications include deodorants and antiperspirants.

Among the numerous medical uses for such an emulsion as a carrier would be supportive first Uses include, as in burn ointments, and the application of antiseptics. Furthermore, corns, Wart and callus remover, e.g. successfully in such a silicone / water emulsion as a carrier on the To be applied to the skin.

Of course, the consistency of the silicone / water emulsion according to the invention can over many ranges from one Lotions of the same consistency, from cold cream-like pastes to gel-like ointments or ointments such as Petrolatum, can be varied.

Silicones are synthetic polymers usually made commercially from chlorosilane monomers and in the form of Liquids, resins and rubbers are available. These are of particular interest to the cosmetics industry Polymers that are combined to form emulsions, fats, pastes, etc. In these compilations a wide variety of materials can be used together with the silicones.

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Monomeric chlorosilanes are very reactive, volatile materials, which easily react with moisture to form silicones and hydrochloric acid as a by-product. D unit they will be in the presence of Moisture is considered to be corrosive to materials and can and must have dangerous properties handled carefully. After processing into silicone polymers, however, these materials become mild, non-irritating and inert substances. Silicones can also be used with other materials to make means for different ones End use, and often the physiological effect of the finished product is determined by the type the non-silicone component determined.

The toxicological properties of silicones have been extensively studied, and as a group, polymers exhibit Silicone fluids and resins usually have a very low level of toxicity. From a practical point of view considered, the risks they pose are extremely small. Liquid polymeric silicones have been irritating and irritating to the skin Subjected to Sensitivity Patch Testing Investigations and typically prove to be safe. The low degree of toxicity of silicone materials has even to be assumed and successful use of silicone fluids in medical and dental applications.

Liquid silicones generally offer excellent protection against irritating substances in aqueous systems, such as harsh detergents and other cleaning specialties in the household. The chemical inertness and the excellent Water repellent properties of liquid silicones are the main reasons for their effectiveness in preventing from dermatitis. Silicones can also act as plasticizers and offer a pleasant non-tacky feel, superior Suntan lotions and creams can be made using silicones, as the liquid

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Silicone is a carrier for the sunscreen and is resistant to being washed off by bathing or perspiration.

Emulsions that contain cyclic polysiloxanes of volatile silicones are already using emulsifying Agents such as dodecylbenzenesulfonic acid have been formulated, but these systems require grinding or Homogenize to emulsify the immiscible phases. You can get compilations of this type emulsify with only up to about 55% concentration of volatile cyclic compounds, and emulsions this Type are often used to emulsion polymerization of cyclic compounds, such as octamethyltetrasiloxane, perform.

The invention leads to a process which makes it possible to emulsify larger concentrations of cyclic polysiloxanes while eliminating the need for milling or homogenizing. The invention also provides 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 above is. This is a particularly useful property for consumer-oriented products as these emulsions therefore ideal as a carrier for the application of epidermis reinforcing agents to the skin of a consumer in beneficial Way can be used.

The invention also offers a system for emulsifying more volatile substances cyclic polysiloxanes, which provide cloudy to transparent materials that are readily made into numerous consumer products and in particular antiperspirants and deodorants, etc. can be put together. Further Possible applications for emulsions of such cyclic compounds on a water basis are skin care products, such as hand-

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lotions, skin fresheners, hair preparations and other grooming aids. As noted above, the process of the present invention allows the consistency of these emulsions depending on the »ultimate purposes of A) the product to vary selectively.

Another advantage lies in the fact that this silicone / Water emulsions consist of relatively volatile cyclic polysiloxane components, so that an emulsion carrier base eventually evaporated from the skin and only the beneficial epidermal strengthening agent on it is left behind.

The invention leads to a silicone / water emulsion and Process for their production and for their use, the emulsion having the following components:

(A) 100 parts by weight of a cyclic polysiloxane or a combination of cyclic polysiloxanes among those of the aliceous formula

CH ,.

I ³

Si-O
I.

wherein η is an integer from 3 to 10, R is selected from -CH ₃ , - (CH ₂ J ₂ CH ₃ , -CH ₂ CH ₂ CF ₃ , -CH ₂ = CH ₂ and -C ₅ H ₅ and combinations thereof and ζ is an integer from 1 to 10,

(B) 0.7 to 666 parts by weight of an emulsifier and

(C) 5.0 to 960 parts by weight of water; to manufacture is under moderate heating to the desired consistency.

The invention leads to a silicone / water emulsion, which consists of 100 parts by weight of a cyclic polysiloxane or a combination of cyclic polysiloxanes of the general

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formula

CH

Si O
R.

wherein η is an integer from 3 to 10, R is selected from -CH ₃ , - (CH ₂ ) _z CH ₃ , -CH ₂ CH ₂ CF ₃ , -CH ₂ = CH ₂ and -CgH ₅ and combinations thereof and ζ is one is an integer from 1 to 10. The polysiloxanes identified with this formula are known as volatile eye 1: <see silicones, and this property of evacuation gives the emulsion advantageous properties. Particularly useful volatile cyclic silicones are octamethyltetrasiloxane and decamethylpentasiloxane.

The volatile cyclic polysiloxane is emulsified with an emulsifier and water combined to form a silicone / water emulsion. The order of mixing the ingredients together is not critical, but particularly satisfactory results can be obtained if the emulsifiers and the water are added are mixed together in a premix to which the volatile cyclic compounds are added.

The cyclic polysiloxane is preferably added to a premix composed of about 50 to 200 parts by weight of water consists of one or more emulsifiers mixed with 100 parts by weight and up to: Achieving a uniform Mixture is heated.

This premix is suitable for the production of a paste-like one Silicone / water emulsions, if a more liquid consistency or a consistency similar to a lotion is desired up to 2000 or mel r parts of water per 100 parts of the emulsifying agents can come. The emulsifying agents can be non-ionic, anionic, or cationic

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be amphoteric, but these are of particular importance Classes of non-ionic emulsifiers that are highly ethoxylated. The ethoxylated fatty acids, ethoxylated and non-ethoxylated Sorbitanesi: er, ethoxylated alkylphenols, and ethoxylated ethers give the best results.

Examples of emulsifiers that are used to produce the silicone / Water emulsions according to this invention can be used without an A; to mean restriction, e.g. the following:

1) ethoxylated fat: acids, such as
Polyoxyethylene-8-ί tearat
Polyoxyethylene 40 stearate
Polyoxyethylene 50 stearate

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

3) ethoxylated sorbitan esters

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

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4) ethoxylated ethers, such as
Polyoxyethylene 4-lauryl ether polyoxyethylene 2 3-lauryl ether polyoxyethylene 20-cetyl ether polyoxyethylene 1O-stearyl ether polyoxyethylene 20-oleyl ether

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

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

About 15 to 50 parts by weight of this emulsifier / water premix are added per 100 parts by weight of the cyclic polysiloxane, if a paste-like silicone / water emulsion it is asked for.

Up to about 1000 parts of this premix can be added per 100 parts of the volatile cyclic polysiloxane to give a low viscosity product similar to a lotion.

By setting the various process parameters, such as the content of volatile cyclisc.iem polysiloxane, emulsifier and water as well as the mixed gray can affect the consistency of the product can be influenced. The silicone / water emulsion can be in the form of a lotion such as a paste or in a creamy form Made and finer viscous in the form of a consistency Ointment, pomade or a gel can be used. Any consistency will of course be selected with the desired end use of the product in mind.

The silicone / water emulsions are used as a carrier for application

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from 0.1 to 20,000 parts by weight of one or more epidermis reinforcing agents per 100 parts of emulsion are useful.

This broad range is intended to include products made from almost pure silicone / water emulsion with a low Amount of the epidermis-strengthening agent contained therein, as well as other products that are only small Amount of silicone / water emulsion included. The epidermis reinforcing agent refers to an additive cosmetic or medicinal in nature generally considered to produce beneficial results, when applied externally to the skin of a consumer. The silicone / water emulsion according to the invention is suitable work particularly well as a vehicle for applying deodorants or antiperspirants to the body.

The premixed water / emulsifier mixture is formed by stirring with moderate heating until a uniform mixture is obtained, whereupon the cyclic polysiloxane is added and mixed slowly without the need for milling or homogenization. Of course, milling and homogenizing can be used if desired, and the term "mixing" includes these methods as well as pure stirring. The term "mixing" is intended to encompass a continuous process which, for example, uses a Werner-Pfleiderer mixer, in which individual streams of the components can be metered into a twin screw device. Likewise, a Henschel high speed mixer, a sonolator homogenizer with a vibrating blade, and a vessel equipped with a mechanical stirring turbine blade give satisfactory results. The silicone / water / emulsifier mixture is then ^{vigorously stirred at 20 to 80 °} C. until an emulsion of the desired consistency is achieved. An antibacterial agent such as formalin can be added if desired.

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A reactor equipped with a hot plate, mechanical air stirrer and thermometer 2 1 stainless steel tank is charged with water and emulsifier, which to 8O ⁰ C, preferably by bringing together and heating to about 20 to 65 pre-blended to 75 ⁰ C and stirred to a to give uniform mixture when all solids are melted. Then the volatile cyclic polysiloxanes, which can be octamethyltetrasiloxane or decamethylpentasiloxane or a combination of these or others, are slowly added to the aqueous premix and ^{vigorously stirred at about 30 to 80, preferably 50 to 60 °} C., until a uniform, fatty emulsion is formed has formed. Once the product is uniform, a small amount of formalin can be added to avoid bacterial activity. Unlike many conventional silicone emulsions, neither colloid milling nor homogenization is required to make these emulsions, but can be used if desired.

The consistency of the emulsion can be controlled by the amount of water added. With a water content of 15 Up to 20% the emulsion has a fat-like consistency, but additional water sets the viscosity of the system down to a lotion-like consistency, and even more water can be used to lower an emulsion Establish viscosity. The silicone / water emulsions according to the invention are completely dispersible in water.

Also, the consistency of the compilation can also be can be modified by the amount of added cyclic polysiloxanes. In other words, the more cyclic Polysiloxanes are contained, the thicker and more fat-like the emulsion will be. A small proportion of cyclic polysiloxanes provides a thinner egg emulsion.

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The emulsifiers also affect 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 it a lotion-like Product supplies.

As can be seen, a wide range of emulsion compositions can be used can be achieved by varying one of these process parameters: Con: entration of the water, cyclic Polysiloxane or emulsifier and the type of emulsifier, whether solid or liquid.

example 1

In a 2 1 stainless steel beaker, 200 g water, 82 g polyoxyethylene stearate 40 and optionally 67 g sorbitan monostearate and heated with stirring at 65 to 75 ⁰ C, was, until a uniform mixture reached when all solids were molten. Then 900 g of decamethylpentasiloxane were slowly added to the aqueous system and ^{stirred vigorously at about 50 to 60 °} C. in order to form a uniform, fat-like emulsion. Two grams of formalin was added when the product became uniform to prevent bacterial activity. The emulsion was prepared without colloid milling or homogenization, and a stable, stiff, paste-like emulsion was formed which was suitable as a vehicle for applying an epidermal reinforcing agent, such as a deodorant or an antiperspirant, directly to the skin.

Example 2

The procedure of Example 1 was repeated, but with the further addition of 11% by weight of polyoxyethylene-20-sorbitan monooleate varied, whereupon an emulsion was obtained with a consistency of a lotion, the about 64 wt .-% of the penta

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contained siloxane, suitable for use in cosmetic Products.

Example 3

Following the procedure of Example 1, a water / emulsifier premix was made from 135 g of polyoxyethylene 40 stearate and 100 g of sorbitan monostearate along with 300 g of water. For this purpose, 1300 g of decamethylpentasiloxane were added given, resulting in a fat-like emulsion. Formalin was added as an antibacterial agent.

Example 4

An emulsifier premix of 255 g of water, 82 g of polyoxyethylene 40 stearate and 67 grams of sorbitan monostearate was prepared by following the procedure of Example 1, followed by this Premix was added to 900 g of octamethyltetrasiloxane, so as to form a paste-like emulsion.

Example 5

An emulsion was made from a 50/50 cyclic silicone mixture, consisting of 450 g of octamethyltetrasiloxane and 450 g of decamethylpentasiloxane, produced, compiled with an emulsifier / water premix of 82 g of polyoxyethylene 40 stearate and 57 g of sorbitan monostearate and 280 g of water. A silicone / water emulsion with a fat-like texture Consistency was thus obtained.

Example 6

A premix of 60 g of sorbitan monostearate and 200 g of 70% strength octylphenoxypolyethoxy-39-ethanol was added to 900 g of decamethylpentasiloxane and given 200 g of Vasser. After

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Procedure of the example, s 1 resulted in a silicone / water emulsion with a soft, flap-like consistency.

Example 7

By combining 100 g of the silicone / water emulsion paste of Example 4 with 20 g of aluminum chlorohydrate in Form of Micro-Dry Ultrafine became an antiperspirant Means made.

Example 8

A skin freshener was made by combining 100 g of the silicone / water emulsion paste of Example 6 with 0.25% perfume made.

Example 9

A suntan lotion was prepared by combining 100 g of the silicone / water emulsion lotion of the example with 3.0% m-homonenthyl salicylate (Cas-118-56-9) and 0.25 ^ε . Perfume made.

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Claims (19)

Dr. rer. nat. Horst Schüler PATENTANWALT 6000 Frankturt / Main 1, Nov. 1980 Kaiserstraße 41 Pr./Dr .Sb. / He. Telephone (0611) 235555 Telex: 04-16759 mapat d Postscheck account: 282420-602 Frankfurt-M. Bank account: 225/0389 Deutsche Bank AG, Frankfurt / M. 8549-6OSI-33O GENERAL ELECRIC COMPANY 1 River Road Schenejtady, N.Y./U.S.A. Claims 1. Silicone / water emulsion with (A) 100 parts by weight of a cyclic polysiloxane or a combination of cyclic polysiloxanes among those of the general formula CIi. -S: where η is an integer from 3 to 10, R under - - (CH ₀ ) ^ CH ₀ f -CH ^ CH- ^ CF- _r -CHo ^- CH -CH ₂ CH ₂ CF ~ and -CcH, - and Kombi-6 5 nations selected hereof and ζ is an integer from 1 to 10, (B) 0.7 to 666 parts by weight of an emulsifier and (C) 5.0 to 960 parts by weight of water. 2. silicone / water emulsion according to claim 1, characterized in that 100 parts of cyclic polysiloxane 15 to 1000 parts of a premix of water and emulsifier are added. 3. silicone / water emulsion according to claim 1 or 2, characterized in that the water / emulsifier premix from (i) 100 parts by weight of one or more emulsifying agents 130025/0631 SAD Agents from the group of ethoxylated fatty acids, ethoxylated and non-ethoxylated sorbitan esters, ethoxylated
Alkylphenols and ethoxylated ethers and (ii) 50 bis
2000 parts by weight of water consists. 4. silicone / water emulsion according to any one of the preceding claims, characterized in that it further contains an antibacterial agent. 5. silicone / water emulsion according to any one of the preceding claims, characterized in that it is in
In the form of a lotion. 6. silicone / water emulsion according to any one of claims 1 to 4, characterized in that it is in the form of a Cream or paste. 7. silicone / water emulsion according to any one of claims 1 to 4, characterized in that it is in the form of a
Ointment or gel is present. 8. silicone / water emulsion according to any one of the preceding claims, characterized in that it also contains 0.1 to 20,000 parts by weight of one or more of the
Has epidermis strengthening agents per 100 parts of the emulsion. 9. silicone / water emulsio ι according to claim 8, characterized characterized in that the epidermal strengthening agent is a cosmetic or medicinal product. 10. silicone / water emulsions according to claim 6, characterized characterized in that the epidermal strengthening agent is a deodorant or perspiration infinite. 1 30025/1 * 63 1 BATH ORIGINAL 11. Process for the production of a silicone / water emulsion according to one of the preceding claims, characterized in that the components (A), (B) and (C) mixed and stirred at moderate heat until an emulsion of the desired consistency is formed. 12. The method according to claim 11, characterized in that 100 parts of cyclic polysiloxane to 15 to Added 1,000 parts of a water / emulsifier premix will. 13. The method according to claim 12, characterized in that the water / emulsifier premix is heated to about 20 to 80 ⁰ C. 14. The method according to claim 12, characterized in that the water / emulsifier premix by mixing (A) 100 parts by weight of one or more emulsifying agents selected from ethoxylated fatty acids, ethoxylated and non-ethoxylated sorbitan esters, ethoxylated alkylphenols and ethoxylated ethers, with (B) 50 to 2000 parts by weight of water and Heat to about 20 to 80 ° C until a uniform mixture is achieved. 15. The method according to claim 14, characterized in that an antibacterial agent is also added. 16. The epidermal strengthening agent, consisting the end (A) 0.1 to 20,000 parts by weight of one or more epidermal strengthening agents contained in a carrier, (B) which is a silicone / water emulsion according to any one of claims 1 to 10. 130025/0631 17. MiLLeI according to claim 16, the water / emulsifier mixture thereof a premix of (i) 100 parts by weight of one or more emulsifiers from the ethoxylated group Fatty acids, ethoxylated and non-ethoxylated sorbitan esters, ethoxylated alkylphenols and ethoxylated Ether and (ii) 50 to 2,000 parts of water. 18. A method for applying an epidermis-strengthening agent, characterized in that the Component (A) according to claim 16 with a carrier of 100 parts by weight of a silicone / water emulsion (A) 100 parts by weight of a cyclic polysiloxane or a combination of cyclic polysiloxanes among those of the general formula CH ₃ --Si— O-- wherein η is an integer from 3 to 10, R is selected from ₃ - (CH ₂ ) _z CH ₃ , -CH ₂ CH ₂ CF ₃ , -CH ₂ = CH ₂ and -CgH ₅ and combinations thereof and ζ is an integer of Is 1 to 10, and (B) 15 to 1000 parts by weight of a water / emulsifier premix, consisting of (i) 100 parts by weight of one or more emulsifiers selected from ethoxylated Fatty acids, ethoxylated and non-ethoxylated sorbitan esters, ethoxylated alkylphenols and ethoxylated Ether, and (ii) 50 to 2000 parts water, mixed and the vehicle applied to the skin. 19. The method according to claim 18, characterized in, that the epidermal strengthening agent in the form of a cosmetic, a medicine, an antiperspirant, a deodorant, a lotion, a paste, a cream, an ointment or a gel is applied. 130025/0631