Patent ID: 7851515

Claim:
Dental composition containing 1 to 60 wt.-% of at least one acid (meth)acrylamide monomer which has two or more polymerizable groups, (ii) 1 to 50 wt.-% of at least one acid monomer which has only one polymerizable group, (iii) 0.01 to 10 wt.-% of at least one polymerization initiator, and (iv) 1 to 80 wt.-% of at least one non-acid (meth)acrylamide monomer, wherein the (meth)acrylamide (i) is 1,3-dimethacrylamido-propane-2-phosphate wherein the monomer (ii) is a compound according to the following formula (2): in which R 1′ =H, CH 3 , R 2′ =H, C 1 -C 5 alkyl or R 2′ forms together with R 3′ and the nitrogen atom to which it is bonded, a heterocycle with 5 to 8 ring atoms, R 3′ =an aliphatic C 1 to C 12 hydrocarbon radical n-fold substituted by Z, wherein the carbon chains of the hydrocarbon radicals can be interrupted by one or more O atoms or R 3′ forms together with R 2′ and the nitrogen atom to which it is bonded a heterocycle with 5 to 8 ring atoms, Z=—P(OH) 2 (═O), —SO 3 H, —COOH, —OP(OH) 2 (═S) or —OP(OH) 2 (═O); n=1 or 2; and/or the acid monomer (ii) is a compound according to formula (3): in which A=O, S, NR with R═C 1 to C 6 alkyl, R 4′ =C 1 -C 6 alkyl, an unsubstituted or substituted phenyl radical, R 5′ =a C 1 to Cl 2 alkylene radical, R 6′ =a C 1 to C 12 alkylene radical, Z=—SO 3 H, —COOH, —OP(OH) 2 (═S), —OP(OH) 2 (═O) or —P(OH) 2 (═O), and wherein the monomer (iv) is N,N′-(diethyl)-1,3-propylene-bis-acrylamide or N,N′-(dimethyl)-1,6-hexylene-bis-acrylamide