Polyaryl ether sulfone semipermeable membrane and process for pr

Details Polyaryl ether sulfone semipermeable membrane and process for pr Polyaryl ether sulfone semipermeable membrane and process for pr

1981-04-24

1982-09-28

Herbert, Jr., Thomas J.

Coating processes

Foraminous product produced

Microporous coating

2105002, 264 41, 264177R, 264178R, 264204, 2642091, 4283066, 4283157, 428332, 428337, 428398, 428419, B05D 500, B01D 396, B32B 326, B32B 2706

Patent

active

043518605

ABSTRACT:
A semipermeable membrane made of a polyaryl ether sulfone comprised of recurring units represented by the general formula (I): ##STR1## wherein X, X', X" and X'" are non-dissociative substituents, and l, m, n and o are integers of from 0 to 4. The membrane, which is composed of a single continuous polymer phase, has pores of a diameter increasing progressively and continuously from the surface layers to the center portion thereof.
The membrane is prepared by the process wherein:

REFERENCES:
patent: 4051300 (1977-09-01), Klein et al.

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