Patent ID: 6140445
Filing Date: 2000-10-31
Classification: C08F,C08G,C08K,C09D

Abstract:
A composition comprising:(a) 10 to 80 percent by weight of a silane oligomer of the formula[R.sub.3 SiO.sub.1/2 ].sub.m [O.sub.1/2 Si(R.sub.2)O.sub.1/2 ].sub.n [SiO.sub.3/2 R].sub.o [SiO.sub.4/2 ].sub.pwhereinEach R is selected individually from the group consisting of B, R.sup.1, --OR.sup.1 and W;whereinB is a silane group bridged by other than an Si--O bond to the Si atom of the siloxane oligomer backbone;Each R.sup.1 is individually a hydrocarbon group of 1 to 10 carbon atoms;each W individually is a monovalent radical;with the proviso that at least one R is a B and at least one-quarter of the R groups are OR.sup.1 ;m=2 to 20;n=0 to 50;o=0 to 10; andp=0 to 5; and(b) 20 to 90%, by weight of a film-forming reactive silane polymer of a number average molecular weight of about 500 to 10,000 which silane polymer is the product of about 30-95%, by weight of ethylenically unsaturated nonsilane containing monomers and about 5-70%. by weight of ethylenically unsaturated silane-containing monomers.