Composition for skin external application
AssigneeKao Corporation
InventorsMasayuki Iida, Ayumi Shimpo, Yukihiro Miyazaki
Life of this patent
Estimating the term…
Abstract
A composition for external preparation for skin includes (A) from 1 to 30 mass % of a polymer having a silicone structure in which a ratio of deformation 0.3 or more and 1 or less, and in a bend resistance test using a cylindrical mandrel method, the minimum diameter of a cylindrical mandrel which causes no cracks in the polymer film is 2 mm or more and 25 mm or less; (B) a volatile oil having a volatilization rate of 14% or more after drying at 1 atmosphere, 40° C., and R.H. of 60% for 30 minutes; and (C) a powder comprising from 0.1 to 30 mass % of at least an inorganic powder having a refractive index of from 1.3 to 1.8. The mass ratio of the component (A) to the component (C), (A)/(C), is from 1 to 50.
Claims4
A composition for external preparation for skin comprising the following components (A), (B), and (C):
- (A) a norbornene/tris(trimethylsiloxy)silylnorbornene copolymer,
- (B) a mixture comprising isododecane and hexamethyldisiloxane, and
- (C) a powder comprising (C-1) an inorganic powder having a refractive index of from 1.3 to 1.8,
- wherein a mass ratio of the component (A) to the component (C), (A)/(C), is from 1 to 50,
- wherein a content of the component (C-1) is from 0.1 to 30 mass % relative to a total mass of the composition,
- wherein a content of the component (A) is from 1 to 20 mass % and a content of the component (B) is from 30 to 98 mass %, each based on a total mass of the composition, and
- wherein a mass ratio of the component (A) to the component (B), (A)/(B), is from 0.02 to 0.4.
Dependencies are inferred from the claim text.