Patent ID: 6162579
Filing Date: 2000-12-19
Classification: G03F,Y10S

Abstract:
A photosensitive composition which comprises an admixture of a free radical polymerizable acrylate or methacrylate component having at least two ethylenically unsaturated groups selected from the group consisting of ethoxylated bisphenol A diacrylate, 1,6-hexanediol diacrylate and mixtures thereof, a photoinitiator in the form of benzil dimethyl ketal and a nitrone selected from the group consisting of N-tertbutylphenyl nitrone; N-tert-butyl alpha-phenyl nitrone; N-tert-butyl-alpha-(p-nitrophenyl) nitrone; 5,5-dimethyl-1-pyrroline N-oxide; N-phenyl alpha-phenyl nitrone and mixtures thereof, wherein said polymerizable component is present in sufficient amount to provide image differentiation when the composition is imagewise exposed to sufficient actinic radiation ad wherein said nitrone is present in an amount sufficient to inhibit free radical polymerization in the nonexposed areas when the composition is subjected to actinic radiation, which composition bleaches at a rate of from about 0.1% per second to about 90% per second when exposed to sufficient amount of actinic radiation.