HAIR CARE COSMETIC COMPOSITION
This hair care cosmetic composition contains (A) colloidal silica core/silicone shell particles consisting of (1) 90 wt % to 10 wt % cores of colloidal silica and (2) 10 wt % to 90 wt % shells of polyorganosiloxane represented by the mean formula R 1 a SiO (4-a)/2 (wherein R 1 's are the same or different and each is an (un)substituted monovalent hydrocarbon group and a is a number of 1.80 to 2.20) and (B) a polyorganosiloxane, the (A)/(B) ratio being from 1/1,000 to 4/1 by weight and the sum of (A) and (B) being 0.1 wt % to 10 wt %. The hair care cosmetic composition gives a smooth feeling and having satisfactory setting retention.
1 . A method for producing a hair care cosmetic composition, comprising:
condensation-polymerizing an organosiloxane, which has a structural unit represented by R 2 a SiO (4-a)/2 , wherein R 2 s are the same or different and each is a substituted or unsubstituted monovalent hydrocarbon group and n is a number of 0 to 3, and which contains no hydroxyl group and 2-10 silicon atoms, with colloidal silica in a water medium in the presence of a surfactant to form an emulsion of (A) colloidal silica core/silicone shell particles, and
blending (B) a polyorganosiloxane which comprises at least one selected from the group consisting of dimethyl silicone, amino-denatured silicone, methylphenyl silicone, polyether-denatured silicone, and alkyl-denatured silicone to the emulsion of (A) colloidal silica core/silicone shell particles.
2 . The method for producing a hair care cosmetic composition, as set forth in claim 1 , wherein the (B) polyorganosiloxane is blended in a form of emulsion.
3 . The method for producing a hair care cosmetic composition, as set forth in claim 1 , wherein a weight ratio (A)/(B) between the component (A) and the component (B) is 1/1000 to 4/1.
4 . The method for producing a hair care cosmetic composition, as set forth in claim 2 , wherein a weight ratio (A)/(B) between the component (A) and the component (B) is 1/1000 to 4/1.
5 . A hair care cosmetic composition produced by the method according to claim 1 .