Patent ID: 8748647
Filing Date: 2014-06-10
Classification: C07F,C08G,C08L

Abstract:
1. A silicic acid polycondensate or partial polycondensate with the following structure (Ib) wherein 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 R′ is an open-chain and/or cyclic alkyl, alkenyl, aryl, or alkylaryl, or arylalkyl group, with preferably 1 to 20 carbon atoms, the radicals R B and B′ can be the same or different, both radicals can have 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, instead of this B′ can also mean —R Z′ has the meaning —NH—C(O)O—, —NH—C(O)—, or —CO(O)—, where the first two radicals named 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, its carbon atom is bonded to the radical B′, the grouping B′—Z′— may not have the meaning of an acrylate group if B comprises an acrylate group, and the grouping B′—Z′— may not be a methacrylate group if B comprises a methacrylate group, a means 1 or 2, and b can be 0 or 1.