发明名称 |
Bead polymerization process for preparing polybenzimidazole |
摘要 |
Polybenzimidazoles are prepared in the form of small particles by reaction of bis(o-diamine) substituted compounds with dicarboxylic acids or of o-diamino-substituted carboxylic acids in the presence of an inert, nonsolvent, liquid medium and polyphosphoric acid.
|
申请公布号 |
US4394500(A) |
申请公布日期 |
1983.07.19 |
申请号 |
US19810290865 |
申请日期 |
1981.08.07 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
MILFORD, JR., GEORGE N. |
分类号 |
C08G73/18;(IPC1-7):C08G69/04 |
主分类号 |
C08G73/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|