Method of producing multilayer reverse osmosis membrane of polya

Details Method of producing multilayer reverse osmosis membrane of polya Method of producing multilayer reverse osmosis membrane of polya

1991-06-27

1992-12-22

Lawrence, Evan

Coating processes

Foraminous product produced

Microporous coating

427340, B05D 500

Patent

active

051733358

ABSTRACT:
The present invention is directed to a method of producing an improved reverse osmosis membrane that shows surprisingly improved solute rejection and permeation properties. The membrane includes a separating layer of a polyamideurea formed in situ by reaction of isocyanate-substituted acyl chloride and a diamine-treated microporous substrate.

REFERENCES:
patent: 4244817 (1981-01-01), Yaginama
patent: 4259183 (1981-08-01), Cadotte
patent: 4606943 (1986-08-01), Rak et al.
patent: 4769148 (1988-09-01), Fibiger et al.
patent: 4824916 (1989-04-01), Kershner et al.
patent: 4859384 (1989-08-01), Fibiger et al.

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