申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0076473A1
公开(公告)日:1983-04-13
Compatible, aqueous developable photopolymerizable composition consisting essentially of (a) 22 to 32% by wt of a monomeric compound having at least two terminal ethylenic groups, (b) 0.1 to 5.0% by wt of a photoinitiator or initiator system, (c) 40 to 80% by wt of a binder system which is the reaction product of (1) 65 to 87 parts by wt of a terpolymer of methylmethacrylate, butylmethacrylate and methacrylic acid as defined, (2) 5 to 20 parts by wt of a polyamide resin and (3) 5 to 20 parts by wt of a copolymer of vinyl pyrrolidone and vinyl acetate, (d) 0.03 to 0.10% by wt of a thermal polymerization inhibitor, and optionally up to 18% by wt of a plasticizer and up to 2.0% by wt of a tertiary amine capable of salt formation with a carboxylic acid. Aqueous developable photopolymerizable elements comprise a support bearing a layer of the composition. Relief printing plates can be prepared by imagewise exposing and developing the elements.
相容的水性可显影光聚合组合物,其主要成分为:(a) 22 至 32% (重量) 的单体化合物,该单体化合物至少具有两个末端乙烯基;(b) 0.1 至 5.0% (重量)的光引发剂或引发剂体系,(c) 40 至 80% (重量)的粘合剂体系,该体系是(1) 65 至 87 (重量)份甲基丙烯酸甲酯、甲基丙烯酸丁酯和甲基丙烯酸的三元共聚物,(2) 5 至 20 (重量)份聚酰胺树脂和(3) 5 至 20 (重量)份吡咯烷酮和醋酸乙烯共聚物的反应产物,(d) 0.03 至 0.10%(重量)的热聚合抑制剂,以及可选的不超过 18%(重量)的增塑剂和不超过 2.0%(重量)的能与羧酸成盐的叔胺。可显影的水性光聚合元素包括带有一层组合物的支撑物。浮雕印版可通过对元件进行图像曝光和显影来制备。