Radiation sensitive plates
AssigneeVickers, Incorporated
InventorsJohn R. Wade, Rodney M. Potts, Michael J. Pratt
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Abstract
A radiation sensitive plate comprises a substrate coated with a photopolymerizable composition. The composition comprises a polymerizable compound containing ethylenic unsaturation, a perester photoinitiator and optionally an optical sensitiser. The substrate may be a sheet of grained and anodized aluminum and the plate is useful in the production of lithographic printing plates.
Claims8
A radiation sensitive plate comprising a substrate coated with a photopolymerizable composition comprising (i) at least one polymerizable compound containing ethylenic unsaturation;
- and (ii) a perester compound having the general formula:
- wherein
- R.sub.21, R.sub.22 and R.sub.23 are each selected from the group consisting of hydrogen, an alkyl radical and an aryl radical;
- n equals 0 or 1, and R.sub.10 is selected from the group consisting of hydrogen or an alkyl radical, and
- V is selected from the group consisting of an aryl radical and a radical which taken with R.sub.10 forms a ring structure including an aryl radical conjugation with the carbonyl;
- and
- (iii) optical sensitizer.
A radiation sensitive plate comprising a substrate coated with a photopolymerizable composition comprising (i) a dimethacrylate ester of a diglycidyl ether of bisphenol A, (ii) a perester having the formula ##STR15## and (iii) an optical sensitizer.
Dependencies are inferred from the claim text.