Liquid purification or separation – Filter – Material
Patent
1996-12-17
1998-11-10
Fortuna, Ana
Liquid purification or separation
Filter
Material
210490, 21050027, 21050038, 427244, 427245, 264 451, B01D 3900
Patent
active
058338543
ABSTRACT:
The invention relates to a semipermeable composite membrane comprising a microporous substrate provided with a semipermeable microporous substrate membrane which is provided, on at least one side, with a water-permeable polymer layer, said polymer layer containing the interfacial-polymerization product of an amine-terminal dendrimer and a compound polymerizing therewith. According to the invention, the amine-terminal dendrimers used, are poly(alkylene imine) dendrimers. These dendrimers preferably have terminal primary and/or secondary amine groups. (1-azabutylidene).sup.x-4 : propylamine or propyl-N-alkyl-amine, wherein x=4, 8, 16, 32 or 64. Expediently, the compound which polymerizes with the dendrimer is selected from the group consisting of a carboxylic acid or carboxylic acid derivative, a sulphonic acid or sulphonic acid derivative, and an isocyanate compound. The invention also relates to a method for the preparation of such a semipermeable composite membrane.
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Angew. Chem, Int. Ed. Engl. vol. 32, No. 9, 1993, Weinheim, DE, pp. 1308-1311 XP002011651.
De Rijk Jan Willem
Rekers Casper J. N.
Zwijnenburg Arie
Fortuna Ana
Stork Friesland BV
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