Solvent stable membranes

Details Solvent stable membranes Solvent stable membranes

1989-10-02

1991-08-13

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210654, 210490, 21050043, B01D 6912

Patent

active

050394215

ABSTRACT:
A composite membrane for separating at least one dissolved or suspended component from a liquid phase, and characterized by solvent stability, comprises:
(A) a substrate microfiltration, ultrafiltration or reverse osmosis membrane which has been initially formed from at least one member selected from non-crosslinked acrylonitrile homopolymers and copolymers, and non-crosslinked substituted acrylonitrile homopolymers and copolymers, and which has been subjected to at least one in situ crosslinking reaction; and
(B) superimposed upon the substrate membrane, at least one coating including at least one component selected from hydrophilic monomers containing reactive functions, hydrophilic oligomers containing reactive functions and hydrophilic polymers containing reactive functions, such reactive functions having been subjected to a post-coating crosslinking reaction.

REFERENCES:
patent: 4477634 (1984-10-01), Linder et al.
patent: 4690765 (1987-09-01), Linder et al.
patent: 4704324 (1987-11-01), Davis et al.

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