发明名称 |
Process for the preparation of polyisocyanates by reaction of carboxylic acids with isocyanates, products prepared by this process and their use in polyurethanes |
摘要 |
Preparation of a polyisocyanate with acylurea groups involves reacting an isocyanate (I) with an aliphatic and/or aromatic carboxylic acid in the presence of a metal-salt catalyst at 20-220 degrees C. Preparation of a polyisocyanate with acylurea groups involves reacting an isocyanate of formula (I) with an aliphatic and/or aromatic carboxylic acid in the presence of a metal-salt catalyst at 20-220 degrees C. R-(NCO)n (I) R = n-valent linear or branched 4-30C (cyclo)aliphatic group or 6-24C aromatic group; and n = 1-4. Independent claims are included for the following: (1) Polyisocyanate with acylurea groups; and (2) A polyurethane coating composition containing a binder comprising polyisocyanate. |
申请公布号 |
EP1238993(A1) |
申请公布日期 |
2002.09.11 |
申请号 |
EP20020003222 |
申请日期 |
2002.02.20 |
申请人 |
BAYER AG |
发明人 |
GUERTLER, CHRISTOPH, DR.;BRAHM, MARTIN, DR. |
分类号 |
C07C273/18;C07B61/00;C07C275/50;C08G18/22;C08G18/34;C08G18/72;C08G18/78;C09D175/04 |
主分类号 |
C07C273/18 |
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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