Semipermeable membrane of phenoxy resin containing sulfuric acid

Details Semipermeable membrane of phenoxy resin containing sulfuric acid Semipermeable membrane of phenoxy resin containing sulfuric acid

1978-05-30

1980-04-29

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

210500M, 528102, 528104, 528109, 528125, 528128, 528171, 528172, 528174, 528175, B01D 1300, B01D 1302, B01D 1304, C08G 6540

Patent

active

042007267

ABSTRACT:
A semipermeable membrane composed of a water-insoluble, membrane-forming polymer (hereinafter referred to as "polymer (II)") which is obtained by partially converting the hydroxyl groups of a polymer represented by the following formula (hereinafter referred to as "polymer (I)"): ##STR1## wherein R and R' are halogen, nitro, methyl or ethyl, X stands for a divalent group selected from methylene, ethylene, isopropylidene, ether (--O--), carbonyl (--CO--), sulfide (--S--), sulfoxide (--SO--) and sulfone (--SO.sub.2 --), l and m are integers of from 0 to 4, p is 0 or 1, and n is an integer of from 100 to 1000,
to sulfuric acid groups or alkali metal, ammonium or nitrogen-containing basic organic compound salts thereof.

REFERENCES:
patent: 3994860 (1976-11-01), Brousse
patent: 4054707 (1977-10-01), Quentin

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