Aqueous silicone polyether microemulsions

摘要

Silicone polyether microemulsions are disclosed containing i) at least 20% by weight of a water immiscible dispersed phase comprising certain polydialkylsiloxane-polyoxyalkylene copolymers having 0.1 to 10 wt % ethylene oxide (C2H4O) groups, optionally a water immiscible silicone or hydrocarbon fluid, and ii) at least 5% by weight of an emulsifier. The silicone polyether microemulsions are optically transparent and have an average particle size of less than 100 nanometers. They may be used in a variety of personal care product formulations. In particular, the silicone polyether microemulsions may be used to prepare “clear” personal care products.

主权项

1. An aqueous silicone polyether microemulsion consisting of:
i) at least 20% by weight of a water immiscible dispersed phase comprising:
A) a polydialkylsiloxane-polyoxyalkylene copolymer having the average formula
R13SiO[R12SiO]x[R1R2siO]ySiR13 or R12R2SiO[R12SiO]xSiR12R2 wherein x ranges from 50 to 1000, y ranges from 1 to 50,
R1 is an alkyl group containing 1 to 6 carbon atoms,R2 is a polyoxyalkylene group having the average formula
—R3O(C2H4O)a(C3H6O)bR4 whereina is greater than 4, b ranges from 0 to 10,R3 is a divalent hydrocarbon group containing 2 to 12 carbon atoms,R4 is hydrogen, R1, or an acetyl group, with the proviso that the polydialkylsiloxane-polyoxyalkylene copolymer
contains 0.1 to 10 wt % ethylene oxide (C2H4O) groups,B) optionally, a water immiscible silicone or hydrocarbon fluid, and ii) at least 5% by weight of
C) an emulsifier selected from an anionic surfactant, a cationic surfactant, a nonionic surfactant, or a combination thereof, wherein the silicone polyether microemulsion is optically transparent and has an average particle size of less than 100 nanometers.