SILOXANE COPOLYMERS CONTAINING ALKENYL GROUPS, PROCESS FOR PREPARING THE SAME AND THEIR USE

摘要

Docket No. Wa 8927-S Paper No. 1 SILOXANE COPOLYMERS CONTAINING ALKENYL GROUPS, PROCESS FOR PREPARING THE SAME AND THEIR USE Novel siloxane copolymers which carry alkenyl groups and contain (a) siloxane units of the formula (I) (b) at least one siloxane unit, per molecule, of the formula (II) and optionally (c) at least one unit, per molecule, selected from the group consisting of units of the formulas (III), (IV), and (V) in which R is a hydrocarbon radical having from 1 to 18 carbon atom(s) per radical or a halogenated hydrocarbon radical having from 1 to 18 carbon atom(s) per radical, R1 is an alkyl radical having from 1 to 4 carbon atom(s) per radical which can be substituted by an ether oxygen atom, G is a radical of the formula -CH2CHR2CHR2OY(OCHR2CR2=CH2)X-1 in which R2 is selected from the group consisting of a hydrogen atom and a methyl radical; Y is a trivalent, tetravalent, pentavalent or hexavalent hydrocarbon radical which has from 2 to 20 carbon atoms per radical and can be substituted by groups of the formula -OH; -OR3; -OSiR43; ; or -X; or can be interrupted by at least one oxygen atom or sulfur atom or one carbonyl group, or Y represents a trivalent radical of the formula ?P, ?P=O or ?SiR5, in which R3 is an alkyl radical having from 1 to 6 carbon atom(s) per radical, R4 is selected from the group consisting of a methyl, ethyl, isopropyl, tert-butyl and phenyl radical, X is a halogen, and R5 is a monovalent hydrocarbon radical having-from 1 to 8 carbon atom (s) per radical, or Y represents a tetravalent element selected from the group consisting of , or , G1 is a radical of the formula G2 is a radical of the formula and G3 is a radical of the formula (x-4?0) , a is 0, 1, 2 or 3; b is 0, 1, 2 or 3; and the sum of a+b is not greater than 3; c is 0, 1 or 2; and x is 3, 4, 5 or 6.