Hydrophilic swellable graft copolymers, their preparation and us

Details Hydrophilic swellable graft copolymers, their preparation and us Hydrophilic swellable graft copolymers, their preparation and us

1990-03-26

1991-04-30

Nielsen, Earl

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528271, 528391, 528393, C08F28306

Patent

active

050118927

ABSTRACT:
The present invention relates to hydrophilic, swellable graft copolymers composed, in random distribution, of 0.5 to 20% by weight of radicals of the general formula I ##STR1## 79 to 99% by weight of radicals containing an acidic group, of the general formula II ##STR2## and 0.1 to 2% by weight of crosslinking structures which are derived from monomers having at least two olefinically unsaturated double bonds, where the radicals X, Y, R.sup.1 to R.sup.4 and n have the meanings given in claim 1, and which are used as absorbents for water and aqueous solutions.

REFERENCES:
patent: 3963805 (1976-06-01), Chu
patent: 3990459 (1976-11-01), Papantoniu
patent: 4528334 (1985-07-01), Knopf et al.
patent: 4705525 (1987-11-01), Abel et al.

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