Title:
高められた加水分解安定性を有するポリアミド膜及びそれらの製造方法
Document Type and Number:
Japanese Patent JP4808902
Kind Code:
B2
Abstract:
The invention relates to a method for producing a hydrolytically stable polyamide membrane having an open-pored, microporous and sponge-like support-layer structure, using a process involving thermally induced liquid-liquid phase separation. A solution of an aliphatic polyamide in a solvent system, which may include a solvent and a non-solvent for the polyamide, is extruded to form a shaped object. After leaving the die, the shaped object is cooled by means of a cooling medium until phase separation occurs and the polymer-rich phase solidifies to form the membrane structure. The solution of the polyamide in the solvent system contains an antioxidant agent as a stabiliser for the polyamide which, together with the solvent system, is selected in a way that the antioxidant agent is essentially insoluble in the solvent system at the phase separation temperature. The invention also relates to a polyamide membrane with improved hydrolytic stability, characterised in that contains an antioxidant agent as a stabiliser for improving hydrolytic stability.
Inventors:
Fleet Belt Vex
Application Number:
JP2002501560A
Publication Date:
November 02, 2011
Filing Date:
May 23, 2001
Export Citation:
Assignee:
Membrana GmbH
International Classes:
B01D71/56; B01D65/02; B01D67/00; B01D69/02; B29C41/26; C08J5/18; B29K77/00; B29K105/04; B29L7/00; C08L77/00
Domestic Patent References:
| JP3502661A | ||||
| JP2086819A | ||||
| JP63088004A |
Attorney, Agent or Firm:
Toshio Yano
Takuya Kuno
Einzel Felix-Reinhard
Takuya Kuno
Einzel Felix-Reinhard