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US 8,475,777 B2Granted
Silicone emulsions, and methods for the production thereof
AssigneeWacker Chemie AG
InventorHolger Rautschek
Life of this patent
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Abstract
Emulsions of high viscosity silicones are prepared by emulsifying a lower viscosity condensable silicone with a partial phosphate ester surfactant, and ripening the emulsion to obtain a higher viscosity silicone dispersed phase without generation of objectional amounts of octaorganocyclotetrasiloxanes. The emulsions are well suited for body care products.
Claims22
A polyorganosiloxane emulsion comprising
- (A) at least one polyorganosiloxane having a viscosity greater than 10,000 mm2/s, measured at 25° C.,
- (B) at least one emulsifier of the formula
- (RO)nP(O)(OH)(3-n) (I)
- in which
- R are identical or different and are monovalent hydrocarbon radicals having 4 to 30 carbon atoms,
- n is 1 or 2,
- and/or salts thereof
- and
- (C) water,
- with the proviso that the emulsion comprises less than 2% by weight of octaorganylcyclotetrasiloxanes, based on the weight of component (A).
7 more elements
Dependencies are inferred from the claim text.