发明名称 |
Process for the preparation of aromatic polyethersulphones |
摘要 |
This invention relates to a process for the preparation of high molecular weight aromatic polyethersulphones from diphenols and dihalogenoaryls, characterized in that N-alkylated acid amides are used as solvents and at the same time for the azeotropic removal of the water of reaction.
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申请公布号 |
US5047496(A) |
申请公布日期 |
1991.09.10 |
申请号 |
US19890365304 |
申请日期 |
1989.06.13 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
ECKEL, THOMAS;FUHR, KARL;OTT, KARL-HEINZ |
分类号 |
C08G75/00;C08G75/23 |
主分类号 |
C08G75/00 |
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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