Patent ID: 6071975
Filing Date: 2000-06-06
Classification: A61K,A61Q,B01F,Y10S

Abstract:
A method of making a thermodynamically stable, clear, single phase, silicone oil-in-water microemulsion, comprising sequentially (i) forming a two-phase mixture comprising water, a siloxane, and a nonionic surfactant, a cationic surfactant, or an anionic surfactant; (ii) adding to the two-phase mixture a co-surfactant selected from the group consisting of monohydroxy alcohols, diols, and triols, until a thermodynamically stable, clear, single phase, pre-microemulsion containing the siloxane is formed; (iii) adding a polymerization initiator to the thermodynamically stable, clear, single phase, pre-microemulsion; (iv) heating the thermodynamically stable, clear, single phase, pre-microemulsion; (v) agitating the heated, thermodynamically stable, clear, single phase, pre-microemulsion; and (vi) allowing the siloxane to polymerize, until a thermodynamically stable, clear, single phase, microemulsion is formed containing a silicone polymer.