发明名称 |
STEAM PURIFICATION OF POLYIMIDE RESINS |
摘要 |
<p>The disclosure relates to a steam stripping process for producing purified polyimides, e.g., polyetherimide homopolymers and polyetherimide copolymers. The process can include contacting an initial polyimide with steam to remove a volatile species from the initial polyimide to produce a purified polyimide. The purified polyimide can have a weight average molecular weight of from 5,000 to 80,000 Daltons. The weight average molecular weight of the purified polyimide can be greater than or equal to 90% of the weight average molecular weight of the initial polyimide. The purified polyimide can have less than 44 ppm of a volatile species, having a molecular weight of less than 250 Daltons. The polyimide can have less than 10 ppm of a metal cation.</p> |
申请公布号 |
EP2773686(A1) |
申请公布日期 |
2014.09.10 |
申请号 |
EP20120795123 |
申请日期 |
2012.10.29 |
申请人 |
SABIC INNOVATIVE PLASTICS IP B.V. |
发明人 |
HOSSAN, ROBERT JOHN;GALLUCCI, ROBERT RUSSELL;LOWERY, DANIEL FRANCIS |
分类号 |
C08G73/10 |
主分类号 |
C08G73/10 |
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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