Cationic vinyl pyridine copolymers and products thereof

Details Cationic vinyl pyridine copolymers and products thereof Cationic vinyl pyridine copolymers and products thereof

1973-06-26

1978-01-17

Gwinnell, Harry J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

427212, 427215, 427390R, 427391, 428375, 428404, 428500, 428537, B32B 2700, D02G 300, B32B 2104, B32B 2106

Patent

active

040693651

ABSTRACT:
Quaternized, cross-linked, insoluble copolymers of unsubstituted and substituted vinyl pyridines and a dihalo organic compound are spontaneously formed at ambient temperature on mixing the two monomers in bulk, in solution or in suspension. The amount of cross-linking may be varied according to the composition and reaction conditions. The polymer product exhibits ion exchange capacity and undergoes a reversible color change from black at a pH above 7 to yellow at a pH below 7. The polymer may be formed in the presence of preformed polymers, substrates such as porous or impervious particles or films to deposit an ion exchange film in situ or on the surface of the substrate. The coated or resin impregnated substrate may be utilized for separation of anionic species from aqueous solution.

REFERENCES:
patent: 2848442 (1958-08-01), Svetlik
patent: 2851450 (1958-09-01), Pritchard
patent: 2970132 (1961-01-01), Reynolds et al.
patent: 2973285 (1961-02-01), Berke et al.

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