发明名称 |
Melt-polymerization process for the preparation of thermoplastic polyamides and polyesteramides |
摘要 |
A melt-polymerization process is described for the preparation of thermoplastic polyamides and polyesteramides by reaction of the appropriate organic diisocyanate and dicarboxylic acid or difunctional carboxylic acid-terminated polyol. The process, which can be conducted in a batch or continuous manner, comprises the steps of admixing the reactants (preferably in the liquid state), heating the mixed reactants at reaction temperature in a manner such that eliminated carbon dioxide can be vented freely, allowing the reaction to proceed until approximately 25-95 percent (preferably at least 50 percent) of the theoretical carbon dioxide has been eliminated and reducing the resulting intermediate to a powder before completing the reaction by melting, homogenizing, and devolatilizing.
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申请公布号 |
US4420602(A) |
申请公布日期 |
1983.12.13 |
申请号 |
US19820424418 |
申请日期 |
1982.09.27 |
申请人 |
THE UPJOHN COMPANY |
发明人 |
BONK, HENRY W.;NELB, II, ROBERT G.;OERTEL, III, RICHARD W. |
分类号 |
C08G18/00;C08G18/08;C08G18/34;C08G18/42;(IPC1-7):C08G18/32 |
主分类号 |
C08G18/00 |
代理机构 |
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地址 |
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