Process for preparing crosslinked water absorbent resins

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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Details

5253273, 525378, 525379, C08F 842, C08F 808

Patent

active

054788943

ABSTRACT:
This invention is directed to a recurring polymeric moiety of the following formula: ##STR1## wherein R is independently selected from hydrogen and C.sub.1 to C.sub.4 alkyl; Y is independently selected from O and NH; and X is independently selected from Cl, F, Br, I, NO.sub.3, HSO.sub.4 and H.sub.2 PO.sub.4.
Polymers of the above structure may be crosslinked by treating the polymer with a base and heating it.

REFERENCES:
patent: 2556075 (1951-06-01), Erickson
patent: 3891695 (1975-06-01), Ray-Chaudhuri
patent: 4016133 (1977-04-01), Hyosu et al.

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