Water-in-oil-type cosmetic
AssigneeKao Corporation
InventorsAkira Shigeta, Yuko Kikuta
Life of this patent
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Abstract
A w/o-type emulsion cosmetic containing as its effective components, in a specific portion, (a) a specific type of dimethylpolysiloxanepolyoxyalkylene copolymer, (b) oil compounds, which contained at least one kind of polysiloxane, (c) a cosmetic powder of which the surface is treated to produce water-repellence, and (d) an aqueous solution of ethyl alcohol. The cosmetic is of a liquid or creamy type which produces a refreshing feeling upon wise, does not generate an oily, sticky feel, and prevents the make-up from breaking down by water or sweat. Thus, one of the advantageous application of the cosmetic as a liquid foundation for summer use.
Claims2
A water-in-oil-type cosmetic comprising as its effective components:
- (a) 0.05-5% by weight of a water-insoluble dimethylpolysiloxanepolyoxyalkylene copolymer represented by the following general formula (I):
- ##STR3## in which a is a value of 1-5, b is a value of 7-15, c is a value of 0-4, m is a value of 20-100, n is a value of 1-5, and R represents a hydrogen atom or an alkyl group having 1-5 carbon atoms;
- (b) 7-60% by weight of oil components, wherein not less than 60% by weight of at least one kind of polysiloxane represented by the following formulae, (II), (III) or (IV), is contained:
- ##STR4## in which x is a value of 1-100, z is a value of not less than 1, y+z is a value of 1-100, and l is a value of 2-6;
- (c) 3-60% by weight of a cosmetic powder of which the surface is treated to produce water-repellence;
- and
- (d) 15-80% by weight of an aqueous solution of ethyl alcohol, wherein the proportion by weight of ethyl alcohol/water is 50/50-2/98.
Dependencies are inferred from the claim text.