Ester-urethane derivatives of (meth)-acrylic acid for dental materials

Abstract

Dental fillings, coatings and teeth are formed of polymers and copolymers of a polyfunctional ester-urethane derivative of (meth)-acrylic acid of the formula ##STR1## in which A is a straight-chain or branched aliphatic radical which has 2 to 20 carbon atoms and optionally contains 1 to 3 oxygen bridges, an aromatic radical with 6 to 24 carbon atoms, an araliphatic radical with 7 to 26 carbon atoms or a cycloaliphatic radical with 6 to 26 carbon atoms, r denotes the number of chains starting from A and denotes a number from 2 to 6, R.sup.1 and R.sup.2 are identical and denote hydrogen or are different and denote hydrogen and methyl, n denotes a number from 0 to 5 independently for each chain starting from A, X stands for the group ##STR2## in which Y denotes a divalent (cyclo)aliphatic radical which has 2 to 15 carbon atoms and optionally contains ester, ether or urethane groups, Z denotes a divalent straight-chain or branched aliphatic hydrocarbon radical which has 3 to 15 carbon atoms and can optionally contain 1 to 3 oxygen bridges and can optionally be substituted by 1 to 4 additional (meth)-acrylate radicals and R.sup.3 denotes hydrogen or methyl independently for each chain starting from A.

Dependencies are inferred from the claim text.