| 发明名称 |
Method for scavenging acidic impurities from polymeric isocyanates |
| 摘要 |
Disclosed is a process for reducing the acid content and thereby increasing the reactivity of a polymethylene polyphenylisocyanate which comprises contacting said polyisocyanate with an effective amount of a poly(N-vinylimidazole). |
| 申请公布号 |
US4661627(A) |
申请公布日期 |
1987.04.28 |
| 申请号 |
US19860897904 |
申请日期 |
1986.08.19 |
| 申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
REGELMAN, DALE F. |
| 分类号 |
C08G18/76;C07C67/00;C07C241/00;C07C263/18;C07C265/00;C07C265/04;C07C265/12;C08G18/70;C08G18/72;C08L75/04;(IPC1-7):C07C137/00 |
主分类号 |
C08G18/76 |
| 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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