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US 5,468,477 AGranted
Vinyl-silicone polymers in cosmetics and personal care products
AssigneeMinnesota Mining and Manufacturing Company
InventorsKanta Kumar, Ramesh C. Kumar, Smarajit Mitra
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Abstract
Cosmetic compositions are provided containing vinyl-silicone graft or block copolymers of the formula ##STR1##
Claims2
A polymer that is the reaction product of
- a) 5-40 weight percent of a mercapto-functional silicone compound of the formula ##STR10## wherein the mole ratio of m/n is 9-49, Y is selected from C1-10 alkylene and alkarylene having at least 10 carbons, wherein the bracketed groups may be randomly distributed throughout the compound, said compound having a total number average molecular weight of 350-20,000;
- b) 0-25 weight percent of a free radically polymerizable soft monomer;
- and
- c) 35-95 weight percent of a free radically polymerizable hard monomer;
- said components b) and c) forming a vinyl portion of said polymer:
- wherein the glass transition temperature of the vinyl portion of the polymer is about 60.degree.-110.degree. C.;
- said polymer comprising 25-35 parts of the mercapto-functional silicone compound, 15-25 parts of methyl acrylate, 45-55 parts of methyl methacrylate and 5-15 parts of methacrylic acid.
4 more elements
A polymer that is the reaction product of
- a) 5-40 weight percent of a mercapto-functional silicone compound of the formula ##STR11## wherein the mole ratio of m/n is 9-49, Y is selected from C1-10 alkylene and alkarylene having at least 10 carbons, wherein the bracketed groups may be randomly distributed throughout the compound, said compound having a total number average molecular weight of 350-20,000;
- b) 0-25 weight percent of a free radically polymerizable soft monomer;
- and
- c) 35-95 weight percent of a free radically polymerizable hard monomer;
- said components b) and forming a vinyl portion of said polymer;
- wherein the glass transition temperature of the vinyl portion of the polymer is about 60.degree.-110.degree. C.;
- said polymer comprising 20-35 parts of the mercapto-functional silicone compound, 55-65 parts of isobutyl methacrylate and 5-15 parts of methacrylic acid.
4 more elements
Dependencies are inferred from the claim text.