Solvent-resistant microporous polymide membranes
    6.
    发明授权
    Solvent-resistant microporous polymide membranes 失效
    耐溶剂微孔聚酰亚胺膜

    公开(公告)号:US5725769A

    公开(公告)日:1998-03-10

    申请号:US503809

    申请日:1995-07-18

    IPC分类号: B01D71/64 C08G73/10 B01D53/22

    CPC分类号: C08G73/1042 B01D71/64

    摘要: An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.

    摘要翻译: 公开了具有优异的耐溶剂性和高度期望的渗透性的不对称微孔膜。 该膜通过溶液浇铸或溶液纺丝方法从包含缩合反应产物的共聚酰胺酸在至少三种选自某些二胺和二酸酐的反应物的溶剂中制备,并经过后处理以酰亚胺化,并且在某些情况下交联 共聚酰胺酸。 该膜可用作用于超滤,微滤和膜接触器应用的未涂覆膜,或者可用作用于选择性渗透涂层以形成用于气体分离,反渗透,纳滤,渗透蒸发或蒸汽渗透的复合膜的载体。