申请人:Kodak Polychrome Graphics LLC
公开号:US06451500B1
公开(公告)日:2002-09-17
An imaging member, such as a negative-working printing plate or on-press cylinder, can be prepared using a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer that comprises recurring units comprising quaternary ammonium carboxylate groups. These quaternary ammonium carboxylate groups include at least one substituted-alkylene(C1-C3)-phenyl group. The imaging member can also include an infrared radiation sensitive material to provide added sensitivity to heat that can be supplied by laser irradiation in the IR region. The heat-sensitive polymer is considered “switchable” in response to heat, and provides a lithographic image without wet processing.
可以使用含有热敏亲水聚合物的亲水成像层来制备成像元件,例如负片印刷版或在印刷机上使用的圆筒。该热敏亲水聚合物包括重复单元,其中包含季铵羧酸盐基团。这些季铵羧酸盐基团包括至少一个取代-烷基(C1-C3)-苯基团。成像元件还可以包括红外辐射敏感材料,以提供额外的热敏灵敏度,可以通过IR区域的激光照射来提供。这种热敏聚合物被认为是“可切换”的,对热的响应提供了一种不需要湿法处理的平版印刷图像。