发明名称 Xanthene dyes and photographic products and processes utilising them.
摘要 Novel dyes have the formula <CHEM> or the formula <CHEM> wherein each R<1> is the same or different and is alkyl; each R<2> is the same or different and is an electron-withdrawing group having a positive sigma value grater than 0.6; X is <CHEM> wherein R<3> is alkyl; Y is an electron-withdrawing group preferably having a positive sigma value greater than 0.6, n is O or 1 and A is an anion. They may be included in photographic products and used in photographic processes.
申请公布号 EP0031698(A1) 申请公布日期 1981.07.08
申请号 EP19800304643 申请日期 1980.12.19
申请人 POLAROID CORPORATION 发明人 COURNOYER, RICHARD LEO;FOLEY, JAMES WALTER
分类号 C07D311/82;C09B11/28;G03C1/83;G03C8/48;(IPC1-7):09B11/28;03C5/54;03C1/84;07D311/82 主分类号 C07D311/82
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