Cosmetic compositions containing microemulsions of dimethylpolysiloxane

Claim 2

A cosmetic composition comprising a dimethylpolysiloxane microemulsion, wherein said microemulsion is formed by the emulsion polymerization of dimethylpolysiloxane, the average particle size of said microemulsion being ≧0.15 micrometers.

Claim 3

A composition comprising a dimethylpolysiloxane microemulsion, wherein said microemulsion is formed by the emulsion polymerization of dimethylpolysiloxane of the general formula: wherein n is an integer having a value of from 3 to 10, theaverage particle size of said microemulsion being ≧0.15 micrometers and the degree of polymerization of the micro­emulsion polymerized dimethylpolysiloxane is from 3 - 5,000.

Claim 4

A composition comprising a dimethylpolysiloxane microemulsion, wherein said microemulsion is formed by the emulsion polymerization of dimethylpolysiloxane of the general formula: wherein n is an integer having a value of from 3 to 10, theaverage particle size of said microemulsion being ≧0.15 micrometers and the degree of polymerization of the micro­emulsion polymerized dimethylpolysiloxane is from 3 - 5,000.

Claim 5

A composition having an emulsion particle size of ≧0.15 micrometers formed by the process comprising: forming a crude emulsion from water, an amount of a first surfactant sufficient to form said crude emulsion and dimethylpolysiloxane of the general formula: wherein n is an integer having a value of from 3 - 10; gradually adding said crude emulsion to an aqueous solution containing a catalytic quantity of an emulsion polymerization promoting catalyst and a second surfactant; carrying out emulsion polymerization at a temperature range of from 0 - 90°C to reach a predetermined viscosity; then neutralizing said polymerization catalyst.

Claim 6

A composition having an emulsion particle size of ≧0.15 micrometers formed by the process comprising: forming a crude emulsion from water, an amount of a first surfactant sufficient to form said crude emulsion and dimethylpolysiloxane of the general formula: wherein n is an integer having a value of from 3 - 10; gradually adding said crude emulsion to an aqueous solution containing a catalytic quantity of an emulsion polymerization promoting catalyst and a second surfactant; carrying out emulsion polymerization at a temperature range of from 0 - 90°C to reach a predetermined viscosity; then neutralizing said polymerization catalyst.

Claim 7

A composition as claimed in Claim 3, wherein said anionic surfactants of groups (A) and (B) are selected from the group consisting of alkyl sulfates, alkylbenzenesulfonic acids the sulfate esters of monoalkyl polyoxyethylene ethers, and alkylnaphthyl-sulfonic acids, said cationic surfactants of groups (A) and (B) are selected from the group consisting of quaternary ammonium hydroxides, and the corresponding salts of these materials, and said nonionic surfactants of groups (A) and (B) are selected from the group consisting of polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenol ethers, polyoxyalkylene alkyl esters, polyoxyalkylene sorbitan alkyl esters, polyethylene glycols, polypropylene glycols, and diethylene glycol.

Claim 8

A composition as claimed in claim 3, wherein said first surfactant is contained in said crude emulsion in an amount of from 2 - 10 wt.%, and water is contained in said crude emulsion in an amount of from 10 - 40 wt%, the balance of said crude emulsion being dimethylpolysiloxane.

Claim 9

A composition as claimed in claim 3, wherein said second surfactant is contained in said aqueous solution in an amount of from 5 - 70 weight parts per 100 weight parts of said dimethylpolysiloxane in said crude emulsion.

Claim 10

A cosmetic composition comprising a microemulsion having an emulsion particle size of ≧0.15 micrometers formed by the process comprising: making a crude emulsion from water, an amount of a first surfactant sufficient to form said crude emulsion and dimethylpolysiloxane of the general formula: wherein n is an integer having a value of from 3 - 10; gradually adding said crude emulsion to an aqueous solution containing a catalytic quantity of an emulsion polymerization promoting catalyst and a second surfactant; carrying out emulsion polymerization at a temperature range of from 0 - 90°C to reach a predetermined viscosity; then neutralizing said polymerization catalyst; wherein said first surfactant is selected from the group (A) consisting of cationic, anionic and nonionic surfactants, and said first surfactant is a single surfactant or combination of surfactants selected from said group (A), with the exception that a cationic surfactant cannot be combined with an anionic surfactant, said second surfactant is selected from the group (B) consisting of cationic, anionic and nonionic surfactants, and said second surfactant is a single surfactant or combination of surfactants selected from said group (B), with the exception that a cationic surfactant cannot be combined with an anionic surfactant; and said polymerization catalyst is selected from the group consisting of cationic and anionic polymerization catalysts, and quaternary ammonium hydroxides, with the requirements: when said first surfactant is anionic said polymerization catalyst must be anionic and said second surfactant is selected from said group (B) anionic and nonionic surfactants; when said first surfactant is cationic said polymerization catalyst must be cationic and said second surfactant is selected from said group (B) cationic and nonionic surfactants; when said first surfactant is nonionic and said polymerization catalyst is anionic said second surfactant is selected from said group (B) anionic and nonionic surfactants; and when said first surfactant is nonionic and said polymerization catalyst is cationic said second surfactant is selected from said group (B) cationic and nonionic surfactants, and from 0 - 99 wt% of freely selected cosmetic components based on the total amount of the cosmetic composition selected from the group consisting of hydrocarbons, esters, higher alcohols, higher fatty acids, moisture retainers, inorganic powders, organic powders, solvents such as ethanol, surfactants, water, germicides and perfumes.

Claim 11

A cosmetic composition comprising a microemulsion having an emulsion particle size of ≧0.15 micrometers formed by the process comprising: making a crude emulsion from water, an amount of a first surfactant sufficient to form said crude emulsion and dimethylpolysiloxane of the general formula: wherein n is an integer having a value of from 3 - 10; gradually adding said crude emulsion to an aqueous solution containing a catalytic quantity of an emulsion polymerization promoting catalyst and a second surfactant; carrying out emulsion polymerization at a temperature range of from 0 - 90°C to reach a predetermined viscosity; then neutralizing said polymerization catalyst; wherein said first surfactant is selected from the group (A) consisting of cationic, anionic and nonionic surfactants, and said first surfactant is a single surfactant or combination of surfactants selected from said group (A), with the exception that a cationic surfactant cannot be combined with an anionic surfactant, said second surfactant is selected from the group (B) consisting of cationic, anionic and nonionic surfactants, and said second surfactant is a single surfactant or combination of surfactants selected from said group (B), with the exception that a cationic surfactant cannot be combined with an anionic surfactant; and said polymerization catalyst is selected from the group consisting of cationic and anionic polymerization catalysts, and quaternary ammonium hydroxides, with the requirements: when said first surfactant is anionic said polymerization catalyst must be anionic and said second surfactant is selected from said group (B) anionic and nonionic surfactants; when said first surfactant is cationic said polymerization catalyst must be cationic and said second surfactant is selected from said group (B) cationic and nonionic surfactants; when said first surfactant is nonionic and said polymerization catalyst is anionic said second surfactant is selected from said group (B) anionic and nonionic surfactants; and when said first surfactant is nonionic and said polymerization catalyst is cationic said second surfactant is selected from said group (B) cationic and nonionic surfactants, and from 0 - 99 wt% of freely selected cosmetic components based on the total amount of the cosmetic composition selected from the group consisting of hydrocarbons, esters, higher alcohols, higher fatty acids, moisture retainers, inorganic powders, organic powders, solvents such as ethanol, surfactants, water, germicides and perfumes.

Claim 12

A cosmetic composition as claimed in claim 7, wherein said hydrocarbons are selected from the group consisting of liquid paraffin, petroleum jelly, solid paraffins, and squalane, said olefin oligomers are selected from the group of esters consisting of isopropyl palmitate, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate, and 2-ethylhexanoic acid triglyceride, said higher alcohols are selected from the group consisting of lauryl alcohol, cetyl alcohol, and stearyl alcohol, said higher fatty acids are selected from the group consisting of palmitic acid and stearic acid, said moisture retainers are selected from the group consisting of ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerol, and sorbitol, said inorganic powders are selected from the group consisting of titanium oxide, carbon black, iron oxide, sericite, talc, kaolin, and mica, said organic powders are selected from the group consisting of nylon, polystyrene, polyethylene, and polyacrylate, and said surfactants are selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, potasium hydroxide, sodium hydroxide, tetramethyl­ammonium hydroxide, octyltrimethylammonium hydroxide, dodecyltrimethyl ammonium hydroxide, hexadecyltrimethyl­ammonium hydroxide, octyldimethyl benzylammonium hydroxide, decyldimethylbenzylammonium hydroxide, didodecyldimethyl­ammonium hydroxide, dioctadecyl dimethylammonium hydroxide, tallow trimethylammonium hydroxide, and cocotrimethylammonium hydroxide.