Process for the preparation of fine-particle, water-swellable po

Details Process for the preparation of fine-particle, water-swellable po Process for the preparation of fine-particle, water-swellable po

1992-01-17

1993-06-15

Nutter, Nathan M.

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

Synthetic resins

From carbohydrate or derivative as a reactant

527311, 527312, 527313, 527315, C08F25100, C08F 218, A61L 1522

Patent

active

052199711

ABSTRACT:
Fine-particle, water-swellable polysaccharide graft copolymers by prepared inverse suspension polymerization of 5 to 40 parts of polysaccharide and 95 to 60 parts of an olefinically unsaturated carboxylic acid, in which an aqueous phase which contains the olefinically unsaturated carboxylic acid, polymerization initiator and 100 to 75 wt. % of the polysaccharide is metered into a hydrophobic solvent which contains 0 to 25 wt. % of the polysaccharide at 40.degree. to 100.degree. C., exhibit improved absorptivity properties and particle size distribution.

REFERENCES:
patent: 4777232 (1988-10-01), Heidel
patent: 5032659 (1991-07-01), Heidel

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