发明授权
- 专利标题: Steam purification of polyimide resins
- 专利标题(中): 聚酰亚胺树脂的蒸汽净化
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申请号: US13286161申请日: 2011-10-31
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公开(公告)号: US08357773B1公开(公告)日: 2013-01-22
- 发明人: Robert R. Gallucci , Robert Hossan , Daniel F. Lowery
- 申请人: Robert R. Gallucci , Robert Hossan , Daniel F. Lowery
- 申请人地址: NL Bergen Op Zoom
- 专利权人: Sabic Innovative Plastics IP B.V.
- 当前专利权人: Sabic Innovative Plastics IP B.V.
- 当前专利权人地址: NL Bergen Op Zoom
- 代理机构: Novak Druce + Quigg LLP
- 代理商 Diderico van Eyl
- 主分类号: C08G64/00
- IPC分类号: C08G64/00 ; C08G63/02
摘要:
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.
公开/授权文献
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