| abstract |
A photopolymerizable composition containing olefinically unsaturated compounds, optional conventional additives and, as photoinitiator, a mixture of a thioether of the general formula (I): (I) <IMAGE> where R4 is phenyl, naphthyl, thienyl, furyl or styryl which may be substituted by one or more identical or different R5's, R5 is phenyl, benzoyl, halogen, alkyl of 1 to 5 carbon atoms, alkyl having an -O-group and 1 to 5 carbon atoms, alkyl having an -S-group and 1 to 5 carbon atoms, alkoxyalkyl of 2 to 5 carbon atoms, alkaryl of 7 to 11 carbon atoms, aralkyl of 7 to 11 carbon atoms, NO2, CN, COOH or COOR6, R6 being an alkyl of 1 to 5 carbon atoms, A is the alkylene group CnH2n (n = an integer of 1 to 5) which may be substituted by one or more R4's and/or R5's, and R1, R2 and R3 may be identical or different and are each H, an R4 or an R5, and an organic amine. |