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US 7,678,301 B2Granted
Vesicles of high molecular weight silicone polyethers
AssigneeDow Corning Corporation
InventorShaow Lin
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Abstract
Vesicle compositions from high molecular weight silicone polyether copolymers, methods for preparing the vesicle compositions, and personal, household, and healthcare formulations containing the vesicle compositions are disclosed.
Claims1
A process for making a vesicle composition comprising;
- I) combining,
- A) 2 to 25 wt % of a silicone polyether copolymer having a structure represented by:
- where R1 represents an alkyl group containing 1-6 carbon atoms;
- R2 represents the group —(CH2)aO(C2H4O)b(C3H6O)cR3;
- x is 251-1,000;
- y is 1-500;
- z is 1-500;
- a is 3-6;
- b is 4-20;
- c is 0-5;
- and R3 is hydrogen, a methyl group, or an acyl group,
- B) 2 to 30 wt % of a water miscible volatile solvent,
- C) water in a sufficient amount to provide the sum of the wt % of A), B), and C) to equal 100%,
- to form an aqueous dispersion of the silicone polyether copolymer,
- II) mixing the aqueous dispersion to form a vesicle composition having an average particle size of less than 0.500 micrometers,
- III) removing the water miscible volatile solvent from the vesicle composition.
13 more elements
Dependencies are inferred from the claim text.