Macroporous, asymmetric, hydrophilic polyaramide membrane

US4891135A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Haubs · Bad Kreuznach, DE
• Friedrich Herold · Hofheim, DE
• Claus-Peter Krieg · Frankfurt am Main, DE
• Detlef Skaletz · Mainz, DE

Key dates

• Filing date: Jan 23, 1989
• Grant date: Jan 2, 1990
• Expiry date: Jan 23, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C12N11/096
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A macrophorous, asymmetric, hydrophilic membrane containing polyaramid is described. The characterizing features are that it contains a copolyamide which has at least the following recurring structural units: PA1 (A) --OC--Ar--CO-- PA1 (B) --NH--Ar'--NH PA1 (C) ##STR1## (D) ##STR2## where Ar and Ar' denote divalent aromatic radicals in which the valence bonds ar in the para or comparable coaxial or parallel position, PA0 denotes a lower alkyl radical or a lower alkoxy radical, in each case having up to 4 carbon atoms, or a halogen radical, and denotes an unsubstituted or substituted methylene radical or an --O--Ar--O-- group where Ar has the same structure as given above.