Patent ID: 6207783
Filing Date: 2001-03-27
Classification: C08F,C08G,C08K

Abstract:
An oligomer of the formula:[R.sub.3 SiO.sub.1/2 ].sub.m [O.sub.1/2 SiR.sub.2 O.sub.1/2 ].sub.n [SiO.sub.3/2 R].sub.o [SiO.sub.4/2 ].sub.p (I)whereineach R is selected individually from the group consisting of R.sup.1, --OR.sup.2 and --OR.sup.3 ;at least one R.sup.1 is a group of the formula --A--W wherein W is a silyl group and A is a group the respective ends of which are bound by Si--C bonds to the group W and to a silicon atom of the oligomer of formula I;each R.sup.2 is a C.sub.1-6 alkyl group or an acyl group; andeach R.sup.3 is independently an alkyl or alkenyl group having at least 8 carbon atoms;with the provisos thatis R.sup.3 is alkenyl, there is no unsaturation within the two carbons adjacent to the oxygen atom of the --OR.sup.3 group; at least one R group is --OR.sup.3 ; at least one quarter of all R groups are --OR.sup.2 or --OR.sup.3 ; m is 2 to 20; n is 0 to 50; o is 0 to 20; and p is 0 to 10.