会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Steam purification of polyimide resins
    • 聚酰亚胺树脂的蒸汽净化
    • US08357773B1
    • 2013-01-22
    • US13286161
    • 2011-10-31
    • Robert R. GallucciRobert HossanDaniel F. Lowery
    • Robert R. GallucciRobert HossanDaniel F. Lowery
    • C08G64/00C08G63/02
    • C08G73/1046C08G73/1003C08G73/1064
    • 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.
    • 本公开涉及用于生产纯化的聚酰亚胺的蒸汽汽提方法,例如聚醚酰亚胺均聚物和聚醚酰亚胺共聚物。 该方法可以包括使初始聚酰亚胺与蒸汽接触以从初始聚酰亚胺中除去挥发性物质以产生纯化的聚酰亚胺。 纯化的聚酰亚胺可以具有5,000至80,000道尔顿的重均分子量。 纯化的聚酰亚胺的重均分子量可以大于或等于初始聚酰亚胺的重均分子量的90%。 纯化的聚酰亚胺可以具有小于44ppm的分子量小于250道尔顿的挥发性物质。 聚酰亚胺可以具有小于10ppm的金属阳离子。