发明公开
EP0927215A1 LINEAR VERY HIGH MOLECULAR WEIGHT POLYAMIDES AND PROCESS FOR PRODUCING THEM
失效
线状聚酰胺具有非常高的分子量和方法生产同样
- 专利标题： LINEAR VERY HIGH MOLECULAR WEIGHT POLYAMIDES AND PROCESS FOR PRODUCING THEM
- 专利标题（中）： 线状聚酰胺具有非常高的分子量和方法生产同样
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申请号： EP97928692.0申请日： 1997-05-30
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公开(公告)号： EP0927215A1公开(公告)日： 1999-07-07
- 发明人: DUJARI, Ramdas , TYNAN, Daniel, Gregory
- 申请人： E.I. DU PONT DE NEMOURS AND COMPANY
- 申请人地址： 1007 Market Street Wilmington Delaware 19898 US
- 专利权人： E.I. DU PONT DE NEMOURS AND COMPANY
- 当前专利权人： E.I. DU PONT DE NEMOURS AND COMPANY
- 当前专利权人地址： 1007 Market Street Wilmington Delaware 19898 US
- 代理机构： Jones, Alan John, et al
- 优先权： US19960657745 19960531
- 国际公布： WO1997045471 19971204
- 主分类号： C08G69
- IPC分类号： C08G69 ; C08G18
摘要：
A linear polyamide having a weight average molecular weight above 200,000 is made by heating a lower molecular weight molten polyamide with thorough mixing at a temperature of about 265-300 °C for at least 5 minutes while an inert gas is swept gently through the reactor, the increase of molecular weight of the polyamide being catalyzed by a particular phosphinic acid derivative.
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