Semi-permeable composite membrane and process for manufacturing

Details Semi-permeable composite membrane and process for manufacturing Semi-permeable composite membrane and process for manufacturing

1991-06-05

1993-05-04

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050035, 21050037, B01D 6912

Patent

active

052079082

ABSTRACT:
The invention relates to a semi-permeable composite membrane with a porous carrier substrate whereon a polymer network obtained by interfacial polymerization is applied, said network comprises an additional polymer. According to the present invention said additional polymer is dissolved in the water phase or in the organic phase, from which said interfacial polymerization occurs, which additional polymer is molecularly entangled in said network and may regulate in particular the selectivity and the permeability of the composite membrane.

REFERENCES:
patent: 4769148 (1988-09-01), Fibiger et al.
patent: 4802984 (1989-02-01), Waite
patent: 4913816 (1990-04-01), Waite
J. E. Cadotte et al. Sci.-Chem., vol. A15, No. 5 (1981) (New York)-Interfacial Synthesis in the Preparation of Reverse Osmosis Membranes.

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