发明名称 |
PROCESSO PARA A PREPARACAO DE UM MONO OU POLI-ISOCIANATO ORGANICO |
摘要 |
A process for the preparation of organic mono- and polyisocyanates is described, in which a hydrogen chloride adduct of a trisubstituted urea is thermally decomposed to form the isocyanate. The hydrogen chloride adduct at minimum contains the stoichiometric amount of HCl, and at maximum a 10 mole-% excess. The process is carried out in a closed system at a temperature between about 80 DEG and 180 DEG C.; the reaction is effected either in a melt or in the presence of an inert organic solvent. |
申请公布号 |
BR7905159(A) |
申请公布日期 |
1980.05.06 |
申请号 |
BR19797905159 |
申请日期 |
1979.08.10 |
申请人 |
AKZO NV |
发明人 |
HENTSCHEL P;ZENGEL H;BERGFELD M |
分类号 |
C07C265/00;C07C;C07C67/00;C07C241/00;C07C263/06;C07C265/04;C07C265/12;C07D213/72;C07D219/08 |
主分类号 |
C07C265/00 |
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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