发明名称 |
PRODUCTION OF ISOCYANATES |
摘要 |
Process for the preparation of organic isocyanates in which a furoxan is heated in the presence of a vicinal diketo compound containing two adjacent keto carbonyl groups. When the furoxan ring is fused to an organic ring system di-isocyanates are produced. An adduct of the furoxan and the diketo compound may be isolated from the reaction mixture and used as a stable isocyanate precursor, for example, a "one-pot" polyurethane composition.
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申请公布号 |
US4145360(A) |
申请公布日期 |
1979.03.20 |
申请号 |
US19770781869 |
申请日期 |
1977.03.28 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LIMITED |
发明人 |
CROSBY, JOHN;MILNER, JOHN A. |
分类号 |
C07C67/00;C07C207/00;C07C241/00;C07C265/00;C07D271/12;C07D273/00;C07D273/01;C08G18/00;C08G18/70;C08G18/80;(IPC1-7):C07C118/00 |
主分类号 |
C07C67/00 |
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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