Polymeric piperazinamides and membranes for reverse osmosis made

Details Polymeric piperazinamides and membranes for reverse osmosis made Polymeric piperazinamides and membranes for reverse osmosis made

1975-11-24

1978-10-31

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

210 23H, 210500M, 260 302, 260 308R, 260 308DS, 260 326NA, 264203, 264212, 528341, 528339, C08G 6926, B01D 3916

Patent

active

041234243

ABSTRACT:
Polymeric piperazinamides suitable for use in reverse osmosis membranes. These polymeric piperazineamides consist essentially of the repeating unit ##STR1## wherein x is zero or a whole number from 1 to 8, R is a substituent such as alkyl, and --A-- is a bivalent radical, namely an organic dicarbonyl radical which either is always of the formula ##STR2## wherein X is oxygen or sulfur, and R' and R" are each hydrogen, alkyl, or aryl, or else where some of said radicals --A-- are of formula (III) and the remainder of said radicals --A-- are organic dicarbonyl radicals differing from said formula (III).

REFERENCES:
patent: 3664986 (1972-05-01), MacDonald
patent: 3935172 (1976-01-01), Vogl et al.
The Condensed Chemical Dictionary, Eighth Edition, p. 64.
Chemical Abstracts, vol. 71, 1969, 22399e.
Ukr. Khim. Zh., (Journal of Ukranian Chemistry), 1969, 35(4), pp. 390-392, Sarzhevskaya et al.

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