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US 2011/0257319 A1Published application
Emulsions Of High Viscosity Silicone Polyethers
AssigneeDow Corning Corporation
InventorsDeborah Lynn Meyers, Jeffrey Rastello, Simon Toth, Bethany K. Johnson, Isabelle Van Reeth
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Abstract
A process is disclosed for making an aqueous emulsion of a silicone polyether having a viscosity greater than 10 kYa-s at 25 QC by combining; an SiH terminated silicone polyether copolymer having an HLB of less than 7, an organopolysiloxane having terminal unsaturated groups, a hydrosilylation catalyst, and an emulsifier to form an oil phase, and then admixing water to the oil phase to form an emulsion.
Claims7
A process for making an aqueous emulsion of a silicone polyether having a viscosity greater than 10 kPa.s at 25° C. comprising:
- I) combining to form an oil phase;
- A) an SiH terminated silicone polyether copolymer having an HLB of less than 7 and an average formula
- HR2SiO(R2SiO)xR2Si—R1—[O(CmH2mO)y]—R1—SiR2O(R2SiO)xR2SiH
- wherein x is ≧0, m is from 2 to 4 inclusive, y≧4,
- R is a monovalent hydrocarbon group containing 1 to 20 carbons,
- R1 is a divalent hydrocarbon containing 2 to 20 carbons,
- B) an organopolysiloxane having terminal unsaturated groups,
- C) a hydrosilylation catalyst,
- D) an emulsifier,
- II) admixing water to the oil phase to form an emulsion.
7 more elements
Dependencies are inferred from the claim text.