Patent ID: 7432385

Claim:
Compound of the Formula I (X a R b Si) m [—{B}—([O] o P[O] p R′ c Y d ) n ] 4-a-b I wherein the groups, radicals and indices have the following meanings: B is an at least divalent, straight-chained or branched group with at least one organically polymerisable radical and at least four carbon atoms, X is a radical that can be cleaved from the silicon atom by hydrolysis, R and R′ are independently alkyl, alkenyl, aryl, alkylaryl or arylalkyl wherein said alkyl, alkenyl, aryl, alkylaryl or arylalkyl is optionally substituted, Y is Cl, OH or OR′, a is 0, 1, 2 or 3, b is 0, 1 or 2, a+b together are 1, 2 or 3, c is 0, 1 or 2, d is 0, 1 or 2, c+d together are 2, m is at least 1, with the proviso that m can only be 1 when a+b is 1 or 2, n is at least 1, o is 0 or 1, and p is 0 or 1.