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    • 99. 发明授权
    • Synthesis of photoreactive polymeric binders
    • 光反应性聚合物粘合剂的合成
    • US5556924A
    • 1996-09-17
    • US602046
    • 1996-02-15
    • Maurice J. FitzgeraldFrederick R. KearneyRong-Chang LiangWilliam C. Schwarzel
    • Maurice J. FitzgeraldFrederick R. KearneyRong-Chang LiangWilliam C. Schwarzel
    • C08F8/00G03F7/033G03F7/038C08F283/00G03F7/035
    • G03F7/033C08F290/04C08G18/728C09J133/08G03F7/0388Y10S430/107Y10S430/111
    • A photoreactive binder that may be used to enhance photospeed in either conventional plates or on-press developable lithographic printing plates. Briefly, a polymer of m-isopropenyl-.alpha.,.alpha.-dimethylbenzyl isocyanate is derivatized for vinyl group reactivity by reacting the isocyanate groups thereof with hydroxyalkyl acrylate. The resulting photopolymeric binder provides significantly higher photospeed than the non-reactive binder currently utilized in the production of conventional printing plates. The resulting lithographic printing plate also shows better durability (as manifested by longer run-length) and is more easily developed by the microencapsulated developers utilized in the present invention. As to the preparation of the photoreactive binders, the application discloses a method of copolymerizing m-isopropenyl-.alpha.,.alpha.-dimethylbenzyl isocyanate (m-TMI) through complexation with an electron-deficient monomer such as maleic anhydride to accelerate free radical copolymerization with other monomers, and thus, provides greater monomer-to-polymer conversion. Use of the resulting product in the photoresist of a lithographic printing plate improves its adhesion to an underlying substrate.
    • 可用于增强传统印版或印刷可印刷平版印刷版中的光速的光反应粘合剂。 简言之,通过使异氰酸酯基团与丙烯酸羟烷基酯反应,将异丙烯基-α,α-二甲基苄基异氰酸酯的聚合物衍生化为乙烯基反应性。 所得到的光聚合物粘合剂提供比目前用于生产常规印刷版的非反应性粘合剂显着更高的感光速度。 所得到的平版印刷版也显示出更好的耐久性(表现为更长的长度),并且由本发明中使用的微囊化显影剂更容易开发。 关于光反应性粘合剂的制备,本申请公开了通过与马来酸酐等电子缺乏单体络合而使间 - 异丙烯基-α,α-二甲基苄基异氰酸酯(m-TMI)共聚的方法,以加速与其它物质的自由基共聚 单体,从而提供更大的单体 - 聚合物转化率。 将所得产物在平版印刷版的光致抗蚀剂中的使用改善了其与下层基材的粘合性。