Process for preparing water-soluble polymers

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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525344, 525355, 525373, 5253282, 5263071, 528492, C08F 812

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054649080

ABSTRACT:
Disclosed herein is a process for preparing a water-soluble polymer comprising subjecting an N-vinylcarboxylic acid amide alone or a mixture of the N-vinylcarboxylic acid amide and other water-soluble vinyl compound(s) copolymerizable therewith to suspension polymerization, and adding hydroxylamine followed by acidic hydrolysis. A water-soluble can be polymerized efficiently without forming gel.

REFERENCES:
patent: 4238579 (1990-12-01), Leonard, Jr. et al.
patent: 4242247 (1980-12-01), Pellon et al.
patent: 4578515 (1986-03-01), Dawson et al.
patent: 4828725 (1989-05-01), Lai et al.
J. March, Advanced Organic Chemistry, 4th Ed. Wiley, 1992, p. 906.

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