Patent ID: 9072666
Filing Date: 2015-07-07
Classification: A61K,A61Q,C08G,C08K,C08L,C09D

Abstract:
1. A method for producing an organopolysiloxane emulsion composition, the method comprising: (I) preparing a first emulsion composition by performing emulsification of a mixture comprising: wherein each R provided that a mass ratio of component (B):component (C) is within a range from 20:80 to 55:45, and (II) subjecting the first emulsion composition to emulsion polymerization, either without adding any water, or following addition of (D-2) not more than 100,000 parts by mass of water, the emulsion polymerization performed at a temperature of less than 40° C., in presence of an acid catalyst (E) (although the acid catalyst is unnecessary in those cases where the anionic surfactant (C) has a catalytic action), thus preparing a target emulsion composition, in which a viscosity at 25° C. of the organopolysiloxane generated in a polymerization time of not more than 15 hours is 300,000 mPa·s or greater, and an amount of octamethylcyclotetrasiloxane contained in the organopolysiloxane is not more than 3,000 ppm.