Patent ID: 6274692
Filing Date: 2001-08-14
Classification: C08G,C09D

Abstract:
A crosslinkable composition comprising:(A.sub.1) linear organopolysiloxanes containing aliphatically unsaturated hydrocarbon radicals, of the general formulaR.sup.1.sub.a R.sub.3-a SiO(R.sub.2 SiO).sub.c [R.sub.2 Si--Y--SiR.sub.2 O(R.sub.2 SiO).sub.c ].sub.d SiR.sub.3-b R.sup.1.sub.b (I)where each R independently is identical or different and is a monovalent, unsubstituted or halogenated hydrocarbon radical which has from 1 to 18 carbon atoms per radical and is free from terminal aliphatic carbon--carbon multiple bonds,R.sup.1 is a monovalent aliphatically unsaturated hydrocarbon radical having from 2 to 14 carbon atoms per radical,Y is a divalent organic radical which is free from terminal aliphatic carbon--carbon multiple bonds,a is 0 or 1,b is 0 or 1,and the sum a+b per molecule is 1 or 2,c is an integer from 1 to 1000 andd is 0 or an integer from 1 to 10,with the proviso thatwithout the use of MQ silicone resins (A.sub.2) the sum a+b in formula (I) is on average from 1.3 to 1.9, and that with the use of MQ silicone resins (A.sub.2) the sum a+b in formula (I) is on average from 1.0 to 1.9.