| 发明名称 |
PROCESSOS APERFEICOADOS PARA A PREPARACAO DE UMA POLIAMINA E DE UMA ESPUMA DE COR MAIS CLARA E ESPUMA OBTIDA |
| 摘要 |
The present invention encompasses an improved process for preparing polymethylene polyphenyl polyisocyanate comprising reacting phosgene with polymethylene polyphenyl polyamine, the improvement wherein the polymethylene polyphenyl polyamine is acidified prior to phosgenation. |
| 申请公布号 |
BR9204958(A) |
申请公布日期 |
1993.06.15 |
| 申请号 |
BR19929204958 |
申请日期 |
1992.12.09 |
| 申请人 |
MILES INC. |
发明人 |
JEFFREY S. BOLTON;RAMON KALYANARAMA;STEVEN L. SCHILLING;CLARENCE D. BLUE |
| 分类号 |
B01J27/10;C07B61/00;C07C209/24;C07C209/78;C07C211/44;C07C211/54;C07C263/10;C07C265/14;C08G12/08;C08G18/00;C08G18/08;C08G18/76;C08G101/00;C08J9/02;(IPC1-7):C08G73/02 |
主分类号 |
B01J27/10 |
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