| abstract |
Filler which is surface-modified with a compound of the formula [(PG)—R 1 —Z] n —SP—[Y—R 2 —(AG)] m , in which AG is —COOH, —P(═O)(OH) 2 , —O—P(═O)(OH) 2 , —SO 2 OH, —SiR 3 R 4 X, or a chelating group; R 1 is a C 1 -C 3 alkylene group or cyclopropylene group or is absent; R 2 is a C 1 -C 10 alkylene group or is absent; R 3 is a C 1 -C 8 alkyl group, chlorine or OR 5 ; R 4 is a C 1 -C 8 alkyl group, phenyl, chlorine or OR 5 ; R 5 is a C 1 -C 6 alkyl group; X is OR 5 or chlorine; Y is O, S, CO—NH, O—CO—NH, NH—CO—NH or is absent, Y n n nbeing absent if R 2 is absent; Z is O, S, CO—NR 6 , O—CO—NH, NH—CO—NH or is absent, R 6 being H or C 1 -C 6 alkyl; PG is a radically polymerizable group of the formula in which R 9 is H, C 1 -C 3 alkyl, C 1 -C 3 hydroxyalkyl or COOR 10 ; R 10 is H, C 1 -C 10 alkyl, 1,6-dimethylphenyl or mesityl; R 11 is H or phenyl; m is 1 or 2; n is 1, 2, 3 or 4; SP is absent or is an (n+m)-valent linear or branched aliphatic C 1 -C 30 radical, in which the carbon chain can be interrupted by O, S, CO—NH, O—CO—NH or NH—CO—NH, an (n+m)-valent aromatic C 6 -C 18 radical, an (n+m)-valent cycloaliphatic C 3 -C 18 radical or an (n+m)-valent heterocyclic C 3 -C 18 radical, where the radicals can be substituted or unsubstituted; in which, if AG is a silyl radical of the formula —SiR 3 R 4 X and PG is a vinyl group of the formula H 2 C═CH—, R 1 and Z are not absent simultaneously. |