WATER-IN-SILICONE OIL MACROEMULSION COSMETIC COMPOSITION

• US 20140135406A1
• Filed: 11/12/2013
• Published: 05/15/2014
• Est. Priority Date: 11/13/2012
• Status: Active Grant

• Current Assignee: Shin-Etsu Chemical Company Limited
• Original Assignee: Shin-Etsu Chemical Company Limited
• Inventors: LEE, Taeck-young
• Granted Patent: US 9,358,188 B2
• Time in Patent Office: Days
• US Class Current: 514/772.3
• CPC Class Codes: A61K 2800/5922 At least two compounds being classified in the same subclass of A61K8/18
• CPC Class Codes: A61K 8/064 Water-in-oil emulsions, e.g. Water-in-silicone emulsions
• CPC Class Codes: A61K 8/20 Halogens; Compounds thereof
• CPC Class Codes: A61K 8/23 Sulfur; Selenium; Tellurium; Compounds thereof
• CPC Class Codes: A61K 8/34 Alcohols
• CPC Class Codes: A61K 8/345 containing more than one hydroxy group
• CPC Class Codes: A61K 8/365 Hydroxycarboxylic acids; Ketocarboxylic acids
• CPC Class Codes: A61K 8/60 Sugars; Derivatives thereof
• CPC Class Codes: A61K 8/86 Polyethers
• CPC Class Codes: A61K 8/89 Polysiloxanes
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61K 8/895 containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 19/007 Preparations for dry skin

Abstract

A water-in-silicone oil (W/S) macroemulsion cosmetic composition of waterdrop quick break type is provided. The silicone oil phase part (S) contains a partly crosslinked emulsifiable silicone elastomer, a partly crosslinked non-emulsifiable silicone elastomer, and silicone oil, and the aqueous phase part (W) contains 1,3-butylene glycol and a lower alcohol, and also, at least one member selected from the group consisting of organic acid salts, inorganic salts, and polyhydric alcohols excluding glycerin and 1,3-butylene glycol as a freeze stabilizer at a predetermined composition. The cosmetic composition instantaneously releases water upon application on the skin. The cosmetic composition is stable at the extremely low temperature of −20° C., and it retains its dispersion stability even after repeated freezing and thawing, and accordingly, it can be used in a variety of cosmetic product.

Claims

1. A water-in-silicone oil macroemulsion cosmetic composition comprising a silicone oil phase part and aqueous phase, wherein

the silicone oil phase part (S) comprises a partly crosslinked emulsifiable silicone elastomer, a partly crosslinked non-emulsifiable silicone elastomer, a non-crosslinked silicone emulsifier, and a silicone oil, and

the aqueous phase part is substantially free from glycerin, and the aqueous phase part (W) contains in water 1,3-butylene glycol and a lower alcohol at a total amount of 13 to 18% by weight of the entire composition, and at least one member selected from the group consisting of organic acid salts, inorganic salts, and polyhydric alcohols other than glycerin and 1,3-butylene glycol at a total amount of 0.4 to 3.0% by weight of the entire composition as a freeze stabilizer.

2. A water-in-silicone oil macroemulsion cosmetic composition of claim 1 wherein the 1,3-butylene glycol and the lower alcohol is 4:

1 to 1;

2 in the weight ratio.

3. A water-in-silicone oil macroemulsion cosmetic composition of claim 1 wherein the content of the organic acid salt is present in an amount of 0.05 to 0.5% by weight of the entire composition.

4. A water-in-silicone oil macroemulsion cosmetic composition according to claim 1 wherein the lower alcohol is at least one member selected from methanol, ethanol, isopropanol, butanol, and pentanol.

5. A water-in-silicone oil macroemulsion cosmetic composition according to claim 1 wherein the organic acid salt is at least one member selected from the group consisting of sodium citrate, sodium formate, sodium acetate, and potassium acetate.

6. A water-in-silicone oil macroemulsion cosmetic composition according to claim 1 wherein the inorganic salt is at least one member selected from sodium chloride, potassium chloride, calcium chloride, magnesium chloride, and magnesium sulfate.

7. A water-in-silicone oil macroemulsion cosmetic composition according to claim 6 wherein the inorganic salt is at least one member selected from sodium chloride and potassium chloride.

8. A water-in-silicone oil macroemulsion cosmetic composition according to claim 1 wherein the polyhydric alcohol is least one member selected from ethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, diethylene glycol, sorbitol, mannitol, maltitol, lactitol, glucose, polyethylene glycol, and polypropylene glycol.