Organofunctional polysiloxane polymers and a method for preparing the same

Abstract

This invention relates to sulfur containing polysiloxane polymers having units of the general formula (M).sub.x (T').sub.y wherein M represents an R.sub.3 SiO.sub.0.5 unit in which R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical having from 1 to 18 carbon atoms, T' represents a unit of the formula (R"S).sub.z R'SiO.sub.1.5 in which R' is a divalent, trivalent or tetravalent hydrocarbon radical having from 2 to 18 carbon atoms or divalent, trivalent or tetravalent hydrocarbon radicals having at least one --C--S--C-- group, R" is hydrogen or R, x and y each represent a number greater than 1 and up to 20,000, in which the ratio of x to y may vary from 1:0.33 to 0.005:1 and z is 1, 2 or 3. These sulfur containing polysiloxane polymers are prepared by reacting in the presence of an acid catalyst a mixture containing (1) a hexaorganodisiloxane and (2) a silicon compound having the formula (R"S).sub.z R'Si(OR).sub.3 in which R, R' and R" are the same as above.

Dependencies are inferred from the claim text.