Patent ID: 7622538

Claim:
Polymerizable dental material, which contains the following components: a) 0.5 to 95 wt.-% (meth)acrylamide phosphate according to Formula (I): in which R 1 is H or CH 3 ; R 2 forms together with the nitrogen atom to which it is bonded and one or more atoms which belong to R 3 or R 3′ a heterocyclic ring; R 3 , R 3′ independently of each other are a linear or branched aliphatic C 1 -C 50 radical with a valency of m+n or p+n, an aromatic C 6 -C 18 radical with a valency of m+n or p+n, or a cycloaliphatic, araliphatic or heterocyclic C 3 -C 13 radical with a valency of m+n or p+n, wherein the carbon chains of the radical or radicals can be interrupted by O, S, CONR 4 , OCONH, or form together with one or more atoms which belong to R 2 and the nitrogen atom to which R 2 is bonded a heterocyclic ring, R 3 ′ being H if p =0, and wherein R 4 is H, C 1 -C 10 alkyl, C 6 -C 12 aryl, C 6 -C 10 aralkyl or a bicylic C 4 -C 12 radical; n is 1, 2, 3 or 4 if p=0, and is 1 or 2if p≠0; m is 1, 2, 3 or 4; p is 0, 1, 2, 3 or 4; x is 0 or S; b) 0.01 to 15 wt.-% initiator, c) 0 to 80 wt.-% non-acid radically polymerizable monomer, d) 0 to 95 wt.-% solvent, and e) 0 to 20 wt.-% filler, said dental material having a pH of about 0.5 to 3.0, and being capable of etching a tooth substance, wherein the R 2 heterocyclic ring is a ring with one nitrogen atom and 4 to 7 carbon atoms.