Patent ID: 6258913
Filing Date: 2001-07-10
Classification: C08G,C09D,Y10T

Abstract:
A polymeric organosilicon compound which contains hydrocarbon radicals having at least one terminal aliphatic carbon-carbon double bond, comprising the reaction product of(A) terminally unsaturated compounds selected from the group consisting of(A1) one or more polymeric organosilicon first reactant(s) selected from the group consisting ofR.sup.1.sub.a R.sub.3-a Si(R.sup.1 RSi).sub.n (R.sub.2 Si).sub.m SiR.sup.1.sub.a R.sub.3-a (I),R.sup.1.sub.a R.sub.3-a SiO(R.sup.1 RSiO).sub.n (R.sub.2 SiO).sub.m SiR.sup.1.sub.a R.sub.3-a (II),andR.sup.1.sub.a R.sub.3-a Si--R.sup.2 --(R.sup.1 RSi--R.sup.2 --).sub.n (R.sub.2 Si--R.sup.2 --).sub.m SiR.sup.1.sub.a R.sub.3-a (III),where R and R.sup.1 are as defined below,R.sup.2 is a divalent hydrocarbon radical having 2 to 8 carbon atoms,a is identical or different at each occurrence and is 0 or 1,n is 0, 1, 2, 3 or 4, andm is 0 or an integer from 1 to 1500,with the proviso that said polymeric organosilicon first reactant(s) contain at least one terminal radical R.sup.1 per molecule,(A2) one or more organic compounds of the formulaY(CH.dbd.CH.sub.2).sub.x (IV)where Y is a mono-, di-, tri- or tetravalent hydrocarbon radical having 1 to 28 carbon atoms, which can be interrupted by one or more oxygen, silicon, boron or titanium atoms or contains one or more --CO.sub.2 -- groups, where x is 1, 2, 3 or 4, and mixtures of (A1) and (A2) with(B) oligomeric or polymeric organosilicon second reactant(s) which comprise(B1) units of the general formula R.sup.1 R.sub.2 SiO.sub.1/2,(B2) at least one unit selected from the group consisting of the general formulae HRSiO and HSiO.sub.3/2, and(B3) optionally one or more units of the general formula R.sub.2 SiO, where R is identical or different at each occurrence and is a monovalent, substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms per radical, which is free from aliphatic carbon-carbon double bonds, R.sup.1 is identical or different at each occurrence and is a monovalent hydrocarbon radical having 2 to 18 carbon atoms per radical, which contains at least one terminal aliphatic carbon-carbon double bond, with the proviso that the sum of the units HRSiO and R.sup.1 R.sub.2 SiO.sub.1/2 is on average greater than 2.0 if (B) contains no units HSiO.sub.3/2, and the number of radicals R.sup.1 in said second reactant(s) is on average greater than the number of Si-bonded hydrogen atoms in said second reactant(s), in the presence of(C) catalysts which promote the addition of Si-bonded hydrogen onto an aliphatic double bond,the ratio of aliphatic double bonds in components (A) and (B) to Si-bonded hydrogens in component (B) being from 1.5 to 10,with the proviso that the polymeric organosilicon compound contain on average more than two hydrocarbon radicals having at least one terminal aliphatic carbon-carbon double bond.