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    • 8. 发明授权
    • Process for preparing a selective permeable membrane
    • 制备选择性渗透膜的方法
    • US4385084A
    • 1983-05-24
    • US151061
    • 1980-05-19
    • Akio IwamaYoshiyasu KamiyamaYoshitaka KazuseHisashi Ichinose
    • Akio IwamaYoshiyasu KamiyamaYoshitaka KazuseHisashi Ichinose
    • C08J9/28B01D71/64C08L79/08B05D5/00
    • B01D71/64C08L79/08
    • A process is described for preparing a selective permeable membrane comprising coating a solution consisting essentially of(i) a polyimide polymer consisting essentially of a repeating unit of the formula (I): ##STR1## wherein R.sup.1 is a divalent organic group, (ii) a swelling agent selected from the group of compounds represented by formula (II) and (III):R.sup.3 O----CH.sub.2 CHR.sup.2 O).sub.n R.sup.4 (II)R.sup.5 ----OH).sub.m (III) wherein R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, can be hydrogen, a methyl group, or an ethyl group, and when R.sup.2 is hydrogen, n can be an integer of from 1 to 5, and when R.sup.2 is a methyl or ethyl group, n can be an integer of from 1 to 3, R.sup.5 is a saturated aliphatic hydrocarbon group containing 3 to 6 carbon atoms, and m can be an integer of from 2 to 6, and(iii) an organic solvent,on a supporting substrate, and immersing the solution coated supporting substrate in a coagulating liquid which does not dissolve the polyimide polymer and is miscible with the organic solvent, to coagulate the polyimide polymer and form the membrane. Membranes prepared by the process are also described.
    • 描述了一种用于制备选择性渗透膜的方法,其包括涂覆基本上由(i)基本上由式(I)的重复单元组成的聚酰亚胺聚合物的溶液:其中R 1是二价有机基团, (ii)选自式(II)和(III)表示的化合物的溶剂:R3O-CH2CHR2O)nR4(II)R5-OH)m(III)其中R2,R3和R4可以 相同或不同,可以是氢,甲基或乙基,当R 2是氢时,n可以是1至5的整数,当R 2是甲基或乙基时,n可以是 1〜3的整数,R5为碳原子数为3〜6的饱和脂肪族烃基,m为2〜6的整数,(iii)有机溶剂,在支持基材上,浸渍溶液 在不溶解聚酰亚胺聚合物并与有机溶剂混溶的凝固液中的涂布的支撑基材凝固 聚酰亚胺聚合物形成膜。 还描述了通过该方法制备的膜。