Photoimaging composition comprising a 2,4,5-triphenylimidazolyl dimer and at least one compound selected from the group consisting of a leuco dye and a polymerizable ethylenically unsaturated monomer
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0024629A2
公开(公告)日:1981-03-11
Photoimaging compositions comprising (A) 2,4,5-triphenylimidazolyl dimer having selected substituents on the 2,4 and 5 phenyl rings and an extinction coefficient determined in methylene chloride at 10-3 to 10-3 mol/liter at 350 nm of at least 4000 liters/mol-cm and at400 nm of at least 250 liters/mol-cm; and at least one of (B1) leuco dye or (82) addition polymerizable ethylenically unsaturated monomeric compound. The new imaging compositions are useful in preparing dual response photoimaging products such as proofing papers, printout paper, overlay films and photopolymerizable elements. Improved imaging speed is achieved at equal concentration levels when compared with conventional 2,4,5-triphenylimidazolyl dimers.
光成像组合物包含(A)2,4,5-三苯基咪唑二聚体,其 2,4,5-苯基环上具有选定的取代基,在二氯甲烷中以 10-3 至 10-3 摩尔/升的浓度测定,在 350 纳米处的消光系数至少为 4000 升/摩尔-厘米,在 400 纳米处的消光系数至少为 250 升/摩尔-厘米;以及(B1)白色染料或(82)可加成聚合的乙烯基不饱和单体化合物中的至少一种。新的成像组合物可用于制备双响应光成像产品,如打样纸、打印纸、覆盖膜和可光聚合元件。与传统的 2,4,5-三苯基咪唑二聚体相比,在同等浓度水平下,成像速度更快。