Patent ID: 7855301

Claim:
Silane of the structure (Ia) below where the radicals and indices have the following meanings: R is an open-chain and/or cyclic alkylene, arylene, or alkylene-arylene group, with 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 their end opposite the silicon atom, R 1 is a Z′-substituted, open-chain and/or cyclic alkylene, arylene, or alkylene-arylene group, with 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 their end opposite the silicon atom, R′ is an open-chain and/or cyclic alkyl, alkenyl, aryl, or alkylaryl, or arylalkyl group, with preferably 1 to 20 carbon atoms, B and B′ can be the same or different, both radicals can be a straight-chain or branched organically polymerizable group with at least one C═C double bond and at least 2 carbon atoms, instead of this B′ can also be —R 2 a SiX 4-a or —R 2 a R 1 b SiX 4-a-b , where R 2 is an alkylene group with 1 to 10 carbon atoms and R′ is defined as above, X is a group which can enter into a hydrolytic condensation reaction with the formation of Si—O—Si bridges, Z′ is selected from —NH—C(O)O—, —NH—C(O)—, or —CO(O)—, where the two radicals named first are bonded via the NH group to the group B′ while the carboxylate group can point in both directions, where, when Z′ is a —CO(O)— group, the carbon atom of which is bonded to the radical B′, and B′ is a straight chained or branched organically polymerizable group having at least one C═C double bond and at least 2 carbon atoms, this C═C double bond must be part of a (meth)-acrylate residue as component of B′, and the grouping B′-Z′- is not an acrylate group if B comprises an acrylate group, and the grouping B′-Z′- is not a methacrylate group if B comprises a methacrylate group, a is 1 or 2, and b is 0 or 1.