Membrane

Details Membrane Membrane

1987-03-10

1989-09-12

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 27, 521 28, 524465, 524475, 427384, 427244, 427245, 427246, 21050041, 210650, 210653, 210654, C08J 928

Patent

active

048660990

ABSTRACT:
A sulphonated aromatic polymer containing repeating units (Ar-Y) (where Y is SO.sub.2 and/or CO), where at least half of groups Ar contain a group SO.sub.3 M and M is l/m of a polyvalent metal cation in at least 80% of such groups SO.sub.3 M, and where m is the valency of the ion. The polyvalent cation compound is formed by heating the corresponding sulphonic acid or monovalent cation compound with a salt of a polyvalent metal. The polymer is useful as a membrane and the polyvalent metal salt addition and/or the heat treatment may be applied to polymer in membrane form.

REFERENCES:
patent: 4026977 (1977-05-01), Bourganel
patent: 4054707 (1977-10-01), Quentin
patent: 4714725 (1987-12-01), Hendy et al.
J. of Polymer Science, Polymer Chemistry Edition, vol. 22, No. 3 (1984), pp. 721-737.

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