EMULSION AND COSMETIC COMPOSITION

• US 20150056152A1
• Filed: 08/25/2014
• Published: 02/26/2015
• Est. Priority Date: 08/26/2013
• Status: Active Grant

• Current Assignee: Nissan Chemical Industries Limited (Shin-Etsu Chemical Company Limited)
• Original Assignee: Nissan Chemical Industries Limited (Shin-Etsu Chemical Company Limited)
• Inventors: WATANABE, Kentaro, YAMAMOTO, Akira, MASUDA, Yukihiro
• Granted Patent: US 9,289,371 B2
• Time in Patent Office: Days
• US Class Current: 424/63
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/466 containing sulfonic acid derivatives; Salts
• CPC Class Codes: A61K 8/8129 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers or esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers, e.g. polyvinylmethylether
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: A61Q 1/10 for eyes, e.g. eyeliner, mascara
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• CPC Class Codes: C08F 2/24 with the aid of emulsifying agents
• CPC Class Codes: C08F 220/06 Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
• CPC Class Codes: C08F 220/18 with acrylic or methacrylic acids
• CPC Class Codes: C08F 220/1802 C2-(meth)acrylate, e.g. ethyl (meth)acrylate
• CPC Class Codes: C08F 220/1804 C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
• CPC Class Codes: C08F 283/122 on to saturated polysiloxanes containing hydrolysable groups, e.g. alkoxy-, thio-, hydroxy-
• CPC Class Codes: C08F 4/40 Redox systems

Abstract

An emulsion is obtained from emulsion polymerization of a mixture of (a) 1-50 wt % of a triorganosiloxysilicic acid and (b) 50-99 wt % of an ethylenically unsaturated monomer in the presence of (c) an emulsion stabilizer which is an anionic surfactant, nonionic surfactant or polyvinyl alcohol. The emulsion is used to formulate a cosmetic composition capable of forming, on drying, a film which has water resistance, oil resistance and toughness and is thus effective for preventing makeup deterioration. The cosmetic composition containing the emulsion is useful as eyeliner, mascara, eyebrow color, liquid foundation or milky lotion.

Claims

1. An emulsion obtained from emulsion polymerization of a mixture of (a) 1 to 50% by weight of a triorganosiloxysilicic acid and (b) 50 to 99% by weight of an ethylenically unsaturated group-containing monomer, the total of components (a) and (b) being 100% by weight, in the presence of (c) at least one emulsion stabilizer selected from the group consisting of an anionic surfactant, nonionic surfactant, and polyvinyl alcohol.

2. The emulsion of claim 1 wherein the triorganosiloxysilicic acid (a) comprises SiO₂ units and R₃SiO_0.5 units (wherein R is an alkyl group of 1 to 6 carbon atoms) in a molar ratio of 0.5 to 2.0, and the total amount of SiO₂ units and R₃SiO_0.5 units accounts for at least 90 mol % of the triorganosiloxysilicic acid (a).

3. The emulsion of claim 2 wherein the triorganosiloxysilicic acid (a) is trimethylsiloxysilicic acid in which R is methyl in R₃SiO_0.5 units.

4. The emulsion of claim 1 wherein the ethylenically unsaturated group-containing monomer (b) is selected from the group consisting of ethylene, propylene, chlorine-containing ethylenically unsaturated monomers, aromatic vinyl monomers, vinyl carboxylate monomers, conjugated diene monomers, ethylenically unsaturated monocarboxylic acid esters, ethylenically unsaturated dicarboxylic acid esters, ethylenically unsaturated monocarboxylic acids, ethylenically unsaturated dicarboxylic acids, alcoholic hydroxyl-containing ethylenically unsaturated monomers, epoxy-containing ethylenically unsaturated monomers, alkoxy-containing ethylenically unsaturated monomers, nitrile-containing ethylenically unsaturated monomers, amide-containing ethylenically unsaturated monomers, amino-containing ethylenically unsaturated monomers, monomers having at least two ethylenically unsaturated groups, and mixtures thereof.

5. The emulsion of claim 1 wherein the ethylenically unsaturated group-containing monomer (b) is selected from the group consisting of acrylic acid, methacrylic acid, alkyl acrylates, alkyl methacrylates, and mixtures thereof.

6. The emulsion of claim 1 wherein the stabilizer (c) is selected from the group consisting of acylamino acid salts, acyltaurine salts, aliphatic soaps, alkyl phosphates, and mixtures thereof.

7. The emulsion of claim 1 which is used in cosmetics.

9. A makeup cosmetic composition comprising 0.1 to 30% by weight calculated as solids and based on the composition of the emulsion of claim 1, which composition is a skin care product, mascara, eyeliner, eyebrow color or foundation.

8. A method for preparing an emulsion comprising the steps of

dissolving (a) 1 to 50% by weight of a triorganosiloxysilicic acid in (b) 50 to 99% by weight of at least one ethylenically unsaturated group-containing monomer to form a mixture, the total of components (a) and (b) being 100% by weight,

adding 0.1 to 20 parts by weight of (c) at least one emulsion stabilizer selected from the group consisting of an anionic surfactant, nonionic surfactant, and polyvinyl alcohol to 100 parts by weight of the mixture, and

effecting emulsion polymerization.