IMAGE FORMING MATERIAL, PLANOGRAPHIC PRINTING PLATE PRECURSOR, AND METHOD FOR MANUFACTURING A PLANOGRAPHIC PRINTING PLATE
申请人:TAGUCHI Yoshinori
公开号:US20120052445A1
公开(公告)日:2012-03-01
The invention provides an infrared-sensitive positive-working image forming material which provides excellent development latitude, image formability and image region strength, and in which decrease in development property is prevented even when a certain time has passed after pattern exposure until development treatment; an infrared-sensitive positive-working planographic printing plate precursor which is formed from the image forming material and has excellent image formability and image region printing durability; and a method for manufacturing a planographic printing plate using the planographic printing plate precursor. The image forming material includes; on a support, a lower layer containing a polymer having carboxylic acid groups at side chains thereof, at least a part of the carboxylic acid groups forming a salt structure with a monovalent basic compound, and an infrared absorbing agent; and an upper layer whose solubility to aqueous alkaline solution is increased by heat, in this order.
本发明提供了一种红外敏感的正向感光成像材料,该材料提供了出色的开发宽容度、图像成形性和图像区域强度,在图案曝光后到开发处理之间即使经过一定时间,也能防止开发性能的降低;一种红外敏感的正向感光平版印刷版前体,该前体由具有出色的图像成形性和图像区域印刷耐久性的图像形成材料形成;以及使用平版印刷版前体制造平版印刷版的方法。该图像形成材料包括:在支撑体上,包含具有羧酸基侧链的聚合物的下层,其中至少部分羧酸基与一价碱性化合物形成盐结构,以及红外吸收剂;以及上层,其对水性碱性溶液的溶解度因热而增加,依此顺序。