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.
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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 |
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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