Photosensitive resin composition containing diazodiphenylamine-aldehyde condensate
AssigneeTokyo Ohka Kogyo Co., Ltd.
InventorsKatsuyuki Ohta, Shigeru Otawa, Shunichi Kasukawa
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Abstract
The invention provides a novel photosensitive or photocurable resin composition suitable for the preparation of a planographic printing plate exhibiting excellent performance in development with an aqueous alkaline development solution as well as good ink-respectivity to form the image areas on the printing plate and high durability in printing . The resin composition comprises an acrylic copolymer and a diazo compound as the essential ingredients and the acrylic copolymer is composed of the recurring monomer units derived from alkyl esters of acrylic or methacrylic acid, from acrylonitrile or methacrylonitrile and from acrylic or methacrylic acid as the comonomers in limited proportions.
Claims9
A photosensitive resin composition which comprises
- (A) an acrylic copolymer composed of the recurring monomer units comprising:
- (a) from 30 to 80% by weight of the monomer units represented by the general formula ##STR4## in which R.sup.1 is a hydrogen atom or a methyl group and R.sup.2 is an alkyl group,
- (b) from 15 to 60% by weight of the monomer units represented by the general formula ##STR5## in which R.sup.3 is a hydrogen atom or a methyl group, and (c) from 5 to 20% by weight of the monomer units represented by the general formula ##STR6## in which R.sup.4 is a hydrogen atom or a methyl group, and (B) a condensation product of formaldehyde or acetaldehyde with a 4-diazodiphenylamine compound.
Dependencies are inferred from the claim text.