发明授权
- 专利标题: METHOD FOR FORMING LITHOGRAPHIC PRINTING PLATES
- 专利标题(中): 用于生产平版印刷版的
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申请号: EP98939401.0申请日: 1998-08-14
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公开(公告)号: EP0939698B1公开(公告)日: 2003-09-24
- 发明人: NGUYEN, My, T. , MERCHANT, Nishith , SHIMAZU, Ken-Ichi , PAPPAS, Peter, S. , HALLMAN, Robert, W. , KESSELMAN, Jerome, P. , SAVARIAR-HAUCK, Celin , HAUCK, Gerhard , TIMPE, Hans-Joachim
- 申请人: Kodak Polychrome Graphics LLC
- 申请人地址: 401 Merritt 7 Norwalk, Connecticut 06851 US
- 专利权人: Kodak Polychrome Graphics LLC
- 当前专利权人: Kodak Polychrome Graphics LLC
- 当前专利权人地址: 401 Merritt 7 Norwalk, Connecticut 06851 US
- 代理机构: Pidgeon, Robert John
- 优先权: US922190 19970902
- 国际公布: WO99011458 19990311
- 主分类号: B41C1/10
- IPC分类号: B41C1/10 ; B41M5/36 ; G03F7/004 ; G03F7/023
摘要:
A method for directly imaging a lithographic printing surface using infrared radiation without the requirement of pre- or post-UV-light exposure, or heat treatment employs a printing plate which contains a support with a hydrophilic surface overcoated with an imaging layer. The imaging layer contains at least one polymer having bonded pendent groups which are hydroxy, carboxylic acid, tert-butyl-oxycarbonyl, sulfonamide, amide, nitrile, urea, or combinations thereof; as well as an infrared absorbing compound. The imaging layer may contain a second polymer which has bonded pendent groups which are 1,2-naphthoquinone diazide, hydroxy, carboxylic acid, sulfonamide, hydroxymethyl amide, alkoxymethyl amide, nitrile, maleimide, urea, or combinations thereof. The imaging layer may also contain a visible absorption dye, a solubility inhibiting agent, or both. In practice, the imaging layer is imagewise exposed to infrared radiation to produce exposed image areas in the imaged layer which have transient solubility in aqueous alkaline developing solution so that solubility is gradually lost over a period of time until the imaged areas become as insoluble as non-imaged areas. Within a short time period of the imaging exposure, the imaged layer is developed with an aqueous alkaline developing solution to form the lithographic printing surface. In this method, the infrared radiation preferably is laser radiation which is digitally controlled.
公开/授权文献
- EP0939698A1 THERMAL LITHOGRAPHIC PRINTING PLATES 公开/授权日:1999-09-08
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