Patent ID: 9221848
Filing Date: 2015-12-29
Classification: A61K,A61Q,C07F,C08G

Abstract:
1. A method of forming an MT-propyl siloxane resin having at least 0.60 moles of R 1 SiO 3/2 units per mole of silicon, wherein R 1 is a substituted or unsubstituted hydrocarbyl group having from 1 to 10 carbon atoms, an aryl group, a carbinol group, an amino group, or a sulfido group, and with the proviso that at least 0.40 moles of the R 1 groups per mole of silicon are propyl groups, said method comprising: hydrolyzing propyl trichlorosilane in an excess of water to provide a T-propyl siloxane resin; capping the T-propyl siloxane resin formed from hydrolyzing propyl trichlorosilane with a silicon-containing M-group capping agent to form the MT-propyl siloxane resin, wherein the silicon-containing M-group capping agent comprises at least 0.50 moles of monofunctional units per mole of silicon, wherein the silicon-containing M-group capping agent is selected from triorganosilanes, halotriorganosilanes, alkoxytriorganosilanes, carboxytriorganosilanes, chlorosilanes, alkoxysilanes, disiloxanes, disilazanes, and compounds having average formula: wherein Z is Cl, an alkoxy group having from 1 to 10 carbons, or a substituted or unsubstituted hydrocarbyl group having from 1 to 10 carbon atoms, and each R 4 , R 5 , and R 6 is independently a substituted or unsubstituted hydrocarbyl group having from 1 to 10 carbon atoms; X is O or NH, and y ranges from 0 to 10; or hydrolyzate thereof, wherein the MT-propyl siloxane resin has the average formula: wherein: a is less than 0.20, and ‘c’ ranges from 0.80 to less than 1, with the proviso that a+c=1.