Production of ion-exchange membrane

Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change

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2642358, 2642884, 2642893, 2642902, 264346, 264348, 521 27, C08J 522, B29C 5500, B29C 5512, B29D 701

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046171630

ABSTRACT:
An ion-exchange membrane of a sheet of an organic polymer comprising a plurality of fixed anonic groups associated with cations which comprise an organic group, e.g. quaternary ammonium cations, a process in which the membrane sheet is expanded by dry stretching to increase the surface area per unit weight of the membrane, a process for its preparation, a process for converting the stretched membrane to one suitable for use in an electrolytic cell, and that use.

REFERENCES:
patent: 4000057 (1976-12-01), Mrazek et al.
patent: 4154909 (1979-05-01), Seita
patent: 4259226 (1981-03-01), Suhara
patent: 4267364 (1981-05-01), Grot
patent: 4284460 (1981-08-01), Moore
patent: 4294943 (1981-10-01), Onoue
patent: 4318785 (1982-09-01), Gunjima
patent: 4433082 (1984-02-01), Grot
Brewster, Organic Chemistry, 3d ed., Prentice-Hall Inc., N.J., 1961; pp. 697-699.

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