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    • 5. 发明授权
    • Permselective membrane and use
    • 选择膜和使用
    • US4229291A
    • 1980-10-21
    • US962269
    • 1978-11-20
    • Axel WalchJurgen WildhardtDieter Beissel
    • Axel WalchJurgen WildhardtDieter Beissel
    • A61M1/16B01D69/06B01D71/56C08G69/26B01D13/00
    • C08G69/26B01D69/06B01D71/56
    • Disclosed is a specific polyamide membrane suitable for hemofiltration, comprising a permselective asymmetric membrane of heteroporous structure comprising a polyamide which comprises a plurality of recurring terephthaloyldiamine units. The membrane has an ultrafiltration capacity of from about 1.5.SM.10.sup.-3 to about 15.multidot.10.sup.-3 cm/s.multidot.bar, determined for water at 0.1 bar and 20.degree. C., a thickness of not more than about 100 microns, and a molecular weight exclusion limit of from about 20,000 to about 70,000 Dalton. The membrane is produced in a process which comprises introducing a solution of the polyamide in a water-miscible organic solvent into an aqueous precipitating liquid to obtain a coagulated membrane sheet, which is subsequently washed and dried.
    • 公开了适用于血液滤过的特定聚酰胺膜,其包含异源结构的选择性不对称膜,其包含聚酰胺,该聚酰胺包含多个重复的对苯二甲酰二胺单元。 该膜的超滤能力为约1.5SM×10-3至约15×10-3cm / sxbar,测定为0.1bar和20℃下的水,厚度不大于约100微米,分子量排除 限制在约20,000至约70,000道尔顿。 膜的制造方法包括将聚酰胺在水混溶性有机溶剂中的溶液引入含水沉淀液中,得到凝结膜片,随后进行洗涤和干燥。