Topical skin preparation composition
AssigneeKao Corporation
InventorsMasayuki Iida, Yukihiro Miyazaki, Motoaki Ito
Life of this patent
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Abstract
A composition for external preparation for skin including the following components (A), (B), and (C). (A) includes from 1 to 30 mass % of a polymer having a silicone moiety in which a ratio of deformation is 0.3 or more and 1 or less, and in a bend resistance test using a cylindrical mandrel method a minimum diameter of a cylindrical mandrel which causes no cracks in a polymer film is 2 mm or longer and 25 mm or shorter. (B) includes a volatile oil having a volatilization rate of 14% or more after drying at 1 atmosphere, at 40° C., and an R.H. of 60% for 30 minutes. (C) includes a cation-modified clay mineral and a mass ratio of the component (A) to the component (C), (A)/(C), is from 5 to 23.
Claims7
A composition for external preparation for skin comprising the following components (A), (B), and (C):
- (A) from 4 to 18 mass % of a norbornene/tris(trimethylsiloxy)silylnorbornene copolymer,
- (B) from 30 to 95 mass % of one or more members selected from the group consisting of isododecane, hexamethyldisiloxane, methyl trimethicone, and polydimethylsiloxane having a kinematic viscosity of 2 cSt or less at 25° C., and
- (C) a cation-modified clay mineral,
- wherein each mass percentage is relative to a total mass of the composition,
- wherein a mass ratio of the component (A) to the component (C), (A)/(C), is from 5 to 23, and
- wherein a mass ratio of the component (A) to the component (B), (A)/(B), is from 0.05 to 0.25.
Dependencies are inferred from the claim text.