Patent ID: 8076441

Claim:
A process for reacting a silane with the structure (IIa) or a re-esterification product, or, in the case X 1 is an alkoxy group, a condensation product of said silane formed by the loss of an alcohol molecule, where the radicals and indices have the following meanings R a is an open-chain and/or cyclic alkylene, arylene, or alkylene-arylene group having 1 to 10 carbon atoms in each case, which can be interrupted by one or more oxygen or sulfur atoms or carboxyl or amino groups or can carry such atoms/groups at its end opposite the silicon atom, R 1 is an open-chain and/or cyclic alkylene, arylene, or alkylene-arylene group having 1 to 10 carbon atoms in each case, substituted with Y, which can be interrupted by one or more oxygen or sulfur atoms or carboxyl or amino groups or can carry such atoms/groups at one of its ends, R′ is an open-chain and/or cyclic alkylene, arylene, or alkylene-arylene group, B has the meaning of a straight-chain or branched organically polymerizable group with at least one C═C double bond and at least 2 carbon atoms, X 1 is a group which can enter into a hydrolytic condensation reaction under formation of Si—O—Si bridges, Y means —OH or —COOH, a is 1 or 2, and b is 0 or 1, via reaction at group Y with a compound having the structure (IV) Q-R 5 [-Q′] c , (IV) where each of Q and each Q′ independently means —NCO, —OH, or —C(O)X′, where —C(O)X′ means a carboxylic acid, an acid anhydride or an activated carbonyl compound in which X′ is a chloride and where each of Q and Q′ independently can be —NCO or —C(O)X′, when the silanes of structure (IIa) as defined above comprise groups Y having the meaning —OH, and where each Q and Q′ independently can be —NCO or —OH—, when the silanes of structure (IIa) as defined above comprise groups Y having the meaning —COOH, where R 5 means a single bond only when each of Q and Q′ independently are activated carboxylic acid groups and c is equal to 1, otherwise R 5 is a radical with c+1 valences, where c is 1 or an integer greater than 1; wherein said component (III) repeats twice, in triplicate or in a higher quantity, where the radicals B, R 1 , R a , R′, X 1 and the indices a and b are defined as above for structure (IIa) and can be identical or different for each occurrence of component (III).