Patent ID: 8921450

Claim:
A radically polymerizable monomer of formula (I) wherein W 1 and W 2 in each case independently represent H or X—R—Y—PG, wherein at least one of W 1 and W 2 represents X—R—Y—PG, X in each case independently is missing or represents an ether, ester, amide, urethane or urea group, Y in each case independently is missing or represents an ether, ester, amide, urethane or urea group, R in each case independently is missing or represents a C 1 -C 16 alkylene radical which can be interrupted by one or more O atoms, wherein R can be missing only if X and/or Y is simultaneously also missing, PG in each case independently represents a cyclic, ring-opening polymerizable group, selected from wherein Z is selected from O, S, R1 is missing or represents a C1-C16 alkylene radical which can be interrupted by one or more O atoms, R2 represents H or a C1-C10 alkyl radical, R3 represents H or a C1-C10 alkyl radical, R4 represents H or a C1-C10 alkyl radical, R5 represents H, —CO—OR11, —CO—R11 or R11, R6 represents H, —CO—R11, —CO—R11 or R11, R7 to R10 in each case independently represent H, —CO—R11, —CO—R11, a C1-C15 alkyl radical which can be interrupted by one or more O atoms, a cycloaliphatic C4-C12 radical, a bicyclic C5-C12 radical, a C6-C14 aryl radical or a C7-C20 arylalkyl radical, R 11 represents a C1-C15 alkyl radical which can be interrupted by one or more 0 atoms, a cycloaliphatic C4-C12 radical, a bicyclic C5-C12 radical, a C6-C14 aryl radical or a C7-C20 arylalkyl radical, n is 0 or 1, p is 0, 1, 2 or 3, q is 0, 1, 2 or 3 and a, b, c and d independently of each other can take the values 3 to 10.