PROCESS FOR PRODUCING CONTROLLED VISCOSITY FLUOROSILICONE POLYMERS

摘要

A process for making a fluorosilicone M''D_aD^F_bM' with M''=(OH)R⁶R⁷SiO_1/2 or (OH)R⁴R⁵SiO_1/2 and is chosen independently of M'; M'=(OH)R⁶R⁷SiO_1/2 or (OH)R⁴R⁵SiO_1/2 and is chosen independently of M''; D=R⁴R⁵SiO_2/2; and D^F=R⁶R⁷SiO_2/2; where the subscript a is zero or positive, the subscript b is positive and the subscripts a and b satisfy the following relationship: b>0.4(a+b) and R¹ is selected from the group of 1 to 20 carbon atom monovalent alkyl, aryl, or alkaryl hydrocarbon radicals and terminally unsaturated alkenyl groups of from 2 to 10 carbon atoms; R², R³ are each independently any monovalent hydrocarbon radical: alkyl, aryl, or alkaryl of from 1 to 20 carbon atoms or R¹ and each R⁴ and R⁵ are any monovalent hydrocarbon radical: alkyl, aryl, alkenyl, or alkaryl of from 1 to 20 carbon atoms, and R⁶ is a fluorine substituted 3 to 20 carbon atom monovalent hydrocarbon radical having no fluorine substitution on the alpha or beta carbon atoms of the radical and R⁷ is any monovalent hydrocarbon radical: alkyl, aryl, or alkaryl of from 1 to 20 carbon atoms or R⁶ by reacting 1 ) b moles of (R⁶R⁷SiO)₃, with 2 ) a moles of (R⁴R⁵SiO)₃, 3 ) water and 4 ) an oxygenated promoter. Compositions made by the process and articles of manufacture made from the compositions.