Concentration or separation method, copolyamides copolyimide-ami

Details Concentration or separation method, copolyamides copolyimide-ami Concentration or separation method, copolyamides copolyimide-ami

1994-02-28

1995-06-20

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528171, 528172, 528226, 528321, 528322, 528345, 528348, 528349, 528352, 528353, 4284111, 428458, 4284735, 4284744, 430 32, 430 56, 430325, 430906, C08G 6932, C08G 7314, G03G 1704

Patent

active

054261724

ABSTRACT:
Mixtures of salts of organic carboxylic acids and organic compounds of non-salt character, dissolved in a C.sub.1 -C.sub.4 alkanol, can be concentrated or separated with a semipermeable membrane made from a copolyamide or copolyimide-amide which contains (a) a first aromatic diamine radical and (b) a second aromatic diamine radical which carries --SO.sub.3 M groups, where M is H.sup..sym., a monovalent to polyvalent metal cation or an ammonium cation. Provided the first diamine radical contains C.sub.1 -C.sub.4 alkyl groups in the o-positions to the amino groups, the copolymers are radiation-sensitive and can be used for producing protective layers or relief images, development being carded out in an aqueous alkaline medium.

REFERENCES:
patent: 4075093 (1978-02-01), Walch et al.
patent: 4217227 (1980-08-01), Elfert et al.
patent: 4694061 (1987-09-01), Pfeifer
patent: 4714669 (1987-12-01), Pfeifer et al.
patent: 4904389 (1990-02-01), Waldhoff et al.
patent: 5198119 (1993-03-01), Berger et al.
patent: 5198316 (1993-03-01), Wernet et al.
patent: 5322922 (1994-06-01), Berger et al.
CA 110:25827c (Jan. 1989).
Patent Abst of Japan vol. 13, No. 190 (C-593) (3538) May 8, 1989.

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