MQ and T-propyl siloxane resins compositions
View Patent ↗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.
1. A siloxane resin composition obtained by mixing:
A) a MQ resin comprising at least 80 mole % of siloxy units selected from
(R 1 3 SiO 1/2 ) a and (SiO 4/2 ) b units, where R 1 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 R 1 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 % R 3 SiO 3/2 units,
where R 3 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 R 3 groups are propyl,
and optionally;
C) a volatile siloxane or organic solvent,
wherein the weight ratio of component A to B is from 90:10 to 10:90.
2. A personal care product comprising the siloxane resin composition of claim 1 .
3. The personal care product of claim 2 , where the personal care product is a cosmetic product.
4. The personal care product of claim 2 , where the personal care product is a hair care product.
5. The silicone resin composition of claim 1 wherein the weight ratio of component A to B is from 85:15 to 15:85.