Patent ID: 7955776

Claim:
A radiation-sensitive element comprising (a) a substrate and (b) a radiation-sensitive coating comprising (i) at least one component selected from photoinitiators and sensitizer/coinitiator systems which absorbs radiation of a wavelength in the range of 250 to 1,200 nm; and (ii) at least one oligomer A of formula (I) wherein X 1 , X 2 and X 3 are independently selected from the group consisting of straight-chain or cyclic C 4 -C 12 alkylene and C 6 -C 10 arylene, a heterocyclic group, a heteroaromatic group, and combinations of two or more of the above, R 1 , R 2 and R 3 are independently selected from the group consisting of —(CHR 4 —CHR 4 —O) n —R 5 (II) and wherein each R 4 is independently selected from the group consisting of a hydrogen atom and CH 3 , each n is independently 0 or an integer from 1 to 20, each m is independently 0 or 1; if n in formula (II) is 0, R 5 is independently selected from the group consisting of if n in formula (II) is an integer from 1 to 20, R 5 is independently selected from the group consisting of and each R 6 is independently selected from the group consisting of a hydrogen atom, with the proviso that (1) n=0 in at least two of the groups R 1 , R 2 and R 3 , and (2) n>2 in the third one of the groups R 1 , R 2 and R 3 , and (3) at least one group R 6 is different from H in formula (III).