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1. 发明授权

US06232031B1 Positive-working, infrared-sensitive lithographic printing plate and method of imaging 失效
标题翻译：正面工作，红外敏感平版印刷版和成像方法
公开(公告)号：US06232031B1
公开(公告)日：2001-05-15
申请号：US09539072
申请日：2000-03-30
申请人： Robert F. Gracia , Yijin Ren , William J. Rozell , Howard A. Fromson
发明人： Robert F. Gracia , Yijin Ren , William J. Rozell , Howard A. Fromson
IPC分类号： G03F7023
CPC分类号： G03F7/0226 , B41C1/1008 , B41C2210/02 , B41C2210/06 , B41C2210/262 , B41M5/368
摘要： A positive-working, infrared imageable coating and a lithographic printing plate or other element with the coating are described. The coating is a phenolic resin containing an o-diazonaphthoquinone derivative which couples or reacts with the resin to partially insolubilize the coating and an infrared absorbing dye or pigment which further insolubilizes the coating and which renders the coating imageable by infrared radiation. The coating contains only that quantity of infrared radiation absorber necessary to be imageable and only that small quantity of o-diazonaphthoquinone derivative necessary to supplement the insolubilizing function of the absorber. Specifically, the absorber is from 1 to 10 weight percent of the total dry weight of the coating and the dry weight ratio of the absorber to the diazonaphthoquinone moiety is greater than 1:5 and preferably 1:2 or greater. By replacing a portion of expensive dye with some less expensive o-diazonaphthoquinone derivative to obtain the necessary degree of insolubility, the cost of the coating is greatly reduced.
摘要翻译：描述了正性工作的可红外成像涂层和平版印刷版或其它具有该涂层的元件。涂层是含有邻二氮萘醌衍生物的酚醛树脂，其与树脂偶联或反应以使涂层部分不溶化，并且红外线吸收染料或颜料进一步使涂层不溶化，并使涂层通过红外辐射成像。涂层仅含有可成像的那种量的红外辐射吸收剂，只有少量的补充吸收剂的不溶性功能所需的邻二氮萘醌衍生物。具体地，吸收剂为涂层总干重的1〜10重量％，吸收体与重氮萘醌部分的干重比大于1:5，优选为1或2以上。通过用一些较便宜的重氮萘醌衍生物代替一部分昂贵的染料以获得必需的不溶性，涂层的成本大大降低。

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