申请人:Yamamoto Chemicals, Inc.
公开号:EP1188797A3
公开(公告)日:2004-03-10
The invention provides a near-infrared absorbing material showing a high sensitivity to a YAG laser having an emission wavelength of 900∼1100 nm as well as a high photothermal conversion efficiency, an original plate for direct printing plate making which utilizes the near-infrared absorbing material, and a novel polymethine compound represented by the following general formula (1), of which the above near-infrared absorbing material is comprised. (wherein R1 and R3 each independently represents an unsubstituted or substituted alkyl group, a cycloalkyl group of 5~7 carbon atoms or an unsubstituted or substituted aryl group; R2 and R4 each independently represents an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group; R5 and R6 each independently represents a hydrogen atom, an unsubstituted or substituted alkyl group or an unsubstituted or substituted alkoxy group; L represents an unsubstituted or substituted alkylene group of 2∼4 carbon atoms which is necessary for formation of a cyclic structure; X represents a hydrogen atom, a halogen atom or a substituted amino group; Z represents a charge-neutralizing ion)
该发明提供了一种近红外吸收材料,对发射波长为900∼1100纳米的YAG激光具有高灵敏度,同时具有高光热转换效率,还提供了一种利用该近红外吸收材料制作直接印刷版的原版,以及一种由以下通用式(1)所表示的新型聚甲烯化合物,其中上述近红外吸收材料由此构成。(其中,R1和R3分别独立表示未取代或取代的烷基基团、5~7个碳原子的环烷基团或未取代或取代的芳基团;R2和R4各自独立表示未取代或取代的烷基基团或未取代或取代的芳基团;R5和R6各自独立表示氢原子、未取代或取代的烷基基团或未取代或取代的烷氧基团;L表示2∼4个碳原子的未取代或取代的烷基烃基团,用于形成环状结构;X表示氢原子、卤素原子或取代的氨基团;Z表示一个电中性的离子)