COSMETIC PREPARATION CONTAINING CROSSLINKABLE SILICONE RUBBER EMULSION AND ITS PRODUCTION METHOD

摘要

A cosmetic preparation containing a crosslinkable silicone rubber emulsion comprising (A) 100 parts by weight of a straight chain or branched organopolysiloxane containing at least two hydroxyl groups bonded to the silicon atom per molecule prepared by ring-opening polymerization of a cyclic organosiloxane in the presence of an alkoxysilane or its partial hydrolytic condensate or an α,ω-dihydroxy or dialkoxy siloxane oligomer by using a catalyst selected from citric, lactic, and ascorbic acids and an anionic surfactant emulsifier; and (B) 0.5 to 20 parts by weight of a reaction product of an amino group-containing organoxysilane and an acid anhydride.

主权项

1. A method for producing a cosmetic preparation comprising the steps of producing a crosslinkable silicone rubber emulsion comprising a straight chain or branched organopolysiloxane (A) containing at least two hydroxyl groups bonded to silicon atoms per molecule prepared by ring-opening polymerization of a cyclic organosiloxane in the presence of an alkoxysilane or its partial hydrolytic condensate or an α,ω-dihydroxy or dialkoxy siloxane oligomer by using at least one member selected from citric acid, lactic acid, and ascorbic acid as a catalyst and using an anionic surfactant as an emulsifier; and mixing the silicon rubber emulsion with a reaction product (B) of an amino group-containing organoxysilane and an acid anhydride at a mixing ratio of 0.5 to 20 parts by weight of the component (B) in relation to 100 parts by weight of the organopolysiloxane (A).