Photopolymerizable mixture, and a recording material produced therefrom

Claim 1

A photopolymerizable composition comprising: (a) a polymeric binder, (b) an acrylate or alkacrylate of a polyhydric alcohol, said acrylate or alkacrylate being free of urethane groups and further comprising at least one group which is photooxidizable on exposure to actinic radiation in the presence of a photoreducible dye, wherein said acrylate or alkacrylate is a compound of the formula I ##STR11## in which Q denotes ##STR12## R denotes an alkyl, hydroxyalkyl or aryl group, R 1 and R 2 are identical or different, and each denote a hydrogen atom, an alkyl group or an alkoxyalkyl group, R 3 denotes a hydrogen atom, a methyl group or an ethyl group, D 1 and D 2 are identical or different, and each denote a saturated hydrocarbon group having 1 to 5 carbon atoms, E denotes a saturated hydrocarbon group having 2 to 12 carbon atoms, a cycloaliphatic group having 5 to 7 ring members and comprising from zero to two N, O or S atoms as ring members, an arylene group having 6 to 12 carbon atoms, a heterocyclic aromatic group having 5 or 6 ring members or a group of the formula II ##STR13## a and b denote integers from 1 to 4, c denotes an integer from 1 to 3, m denotes 2, 3 or 4, depending on the valency of Q, and n denotes an integer from 1 to m, where all radicals of the same definition may be identical to or different from one another, (c) a photoinitiator comprising a photoreducible dye, and (d) a second photoinitiatior comprising a trihalomethyl compound capable of being cleaved by irradiation.