发明授权
- 专利标题： Photographic materials comprising formazan dyes
- 专利标题（中）： 包含FORMAZAN DYES的摄影材料
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申请号： US3698908D申请日： 1971-02-19
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公开(公告)号： US3698908A公开(公告)日： 1972-10-17
- 发明人: MACDONALD ERIC , CAMPBELL FREDERICK
- 申请人： ILFORD LTD
- 专利权人： Ilford Ltd
- 当前专利权人： Ilford Ltd
- 优先权： GB809570 1970-02-19
- 主分类号： C09B50/06
- IPC分类号： C09B50/06 ; G03C1/83 ; G03C1/84
摘要：
THE APPLICATION DESCRIBES A FORMAZAN DYE OF THE FORMULA:
R1-N=N-C(-R2)=N-NH-R3-NH-N=C(-R2)-N=N-R1
WHEREIN R1 IS AN ARYL OR SUBSTITUTED ARYL GROUP, R2 IS AN ALKYL GROUP CONTAINING UP TO 6 CARBON ATOMS AND R3 IS EITHER A DIPHENYL OR A STILBENE LINKAGE GROUP WHEREIN, IN EITHER GROUP, EACH OF THE BENZENE NUCLEI IS SUBSTITUTED WITH A SULPHONIC ACID GROUP OR AN ALKALI METAL OR AMMONIUM SALT THEREOF.
R1-N=N-C(-R2)=N-NH-R3-NH-N=C(-R2)-N=N-R1
WHEREIN R1 IS AN ARYL OR SUBSTITUTED ARYL GROUP, R2 IS AN ALKYL GROUP CONTAINING UP TO 6 CARBON ATOMS AND R3 IS EITHER A DIPHENYL OR A STILBENE LINKAGE GROUP WHEREIN, IN EITHER GROUP, EACH OF THE BENZENE NUCLEI IS SUBSTITUTED WITH A SULPHONIC ACID GROUP OR AN ALKALI METAL OR AMMONIUM SALT THEREOF.