发明名称 |
Carbonless duplicating and marking systems utilizing indolyl-substituted furanone color formers |
摘要 |
Mono-, bis- and tris-indolyl-substituted furanones useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared respectively by: the interaction of an indole with mucochloric acid; the interaction of an indole with a 4-mono(indolyl)-substituted 4-oxo-2-butenoic acid; and by the interaction of an indole with a 2,4-bis(indolyl)-substituted 4-oxobutanoic acid or with a 3,5-bis(indolyl)-substituted furanone.
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申请公布号 |
US4275121(A) |
申请公布日期 |
1981.06.23 |
申请号 |
US19790058960 |
申请日期 |
1979.07.19 |
申请人 |
STERLING DRUG INC. |
发明人 |
CROUNSE, NATHAN N.;SCHMIDT, PAUL J. |
分类号 |
B41M5/136;B41M5/145;B41M5/323;C07D209/12;C07D209/14;C07D209/18;C07D307/58;C07D307/94;C07D405/04;C07D405/14;(IPC1-7):B41M5/16 |
主分类号 |
B41M5/136 |
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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