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US 2007/0166271 A1Published application
Mq and t-propyl siloxane resins compositions
AssigneeDow Corning Corporation
InventorsGlenn Gordon, Randall Schmidt, Lori Stark-Kasley, Gray Wieber
Life of this patent
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Abstract
Siloxane resin compositions obtained by mixing a MQ siloxane resin with a propyl silsesquioxane resin are disclosed. These siloxane resins are useful in a variety of personal, household, automotive and medical care applications, and in particular, as a resin additive in pigmented cosmetic formulations.
Claims4
A siloxane resin composition obtained by mixing:
- A) a MQ resin comprising at least 80 mole % of siloxy units selected from (R13SiO1/2)a and (SiO4/2)b units, where R1 is independently an alkyl group having from 1 to 8 carbon atoms, an aryl group, a carbinol group, or an amino group, with the proviso that at least 95 mole % of the R1 groups are alkyl groups, a and b has a value greater than zero, and the ratio of a/b is 0.5 to 1.5;
- B) a propyl silsesquioxane resin comprising at least 80 mole % R3SiO3/2 units, where R3 is independently an alkyl group having from 1 to 8 carbon atoms, an aryl group, a carbinol group, or an amino group,
- with the proviso that at least 40 mole % of the R3 groups are propyl, and optionally;
- C) a volatile siloxane or organic solvent,
- wherein the weight ratio of component A to B is from 1:99 to 99:1.
2 more elements
Dependencies are inferred from the claim text.