发明名称 |
VERFAHREN ZUR HERSTELLUNG VON ORGANISCHEN MONO- UND POLYISOCYANATEN DURCH THERMISCHE SPALTUNG DER HYDROCHLORIDE TRISUBSTITUIERTER HARNSTOFFE |
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 |
DE2837341(A1) |
申请公布日期 |
1980.03.20 |
申请号 |
DE19782837341 |
申请日期 |
1978.08.26 |
申请人 |
AKZO GMBH |
发明人 |
HENTSCHEL,PETER,DIPL.-CHEM.DR.;ZENGEL,HANS,DIPL.-ING.DR.;BERGFELD,MANFRED,DIPL.-CHEM.DR. |
分类号 |
C07C265/00;C07C;C07C67/00;C07C241/00;C07C263/06;C07C265/04;C07C265/12;C07D213/72;C07D219/08;(IPC1-7):C07C119/042;C07C119/048;C07C119/045 |
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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