发明名称 |
LITHOGRAPICH PRINTING PLATES WITH PHOTOREACTIVE POLYMERIC BINDERS |
摘要 |
<p>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 anhdride 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.</p> |
申请公布号 |
WO9512837(A1) |
申请公布日期 |
1995.05.11 |
申请号 |
WO1994US12395 |
申请日期 |
1994.10.27 |
申请人 |
POLAROID CORPORATION |
发明人 |
FITZGERALD, MAURICE, J.;KEARNEY, FREDERICK, R.;LIANG, RONG-CHANG;SCHWARZEL, WILLIAM, C. |
分类号 |
G03F7/027;C08F8/00;C08F26/00;C08F226/00;C08F290/00;C08F299/00;G03F7/00;G03F7/033;G03F7/035;G03F7/038;(IPC1-7):G03F7/033 |
主分类号 |
G03F7/027 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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