Process for the preparation of fine-particle,...

Details Process for the preparation of fine-particle,... Process for the preparation of fine-particle,...

C - Chemistry, Metallurgy

08

F

C08F 251/00 (2006.01)

Patent

CA 2061360

ABSTRACT PROCESS FOR THE PREPARATION OF FINE-PARTICLE, WATER-SWELLABLE POLYSACCHARIDE GRAFT COPOLYMERS In a process for the preparation of fine-particle, water-swellable polysaccharide graft copolymers is disclosed. The process comprises an inverse suspension polymerisation and crosslinking of 5 to 40 parts of polysaccharide and 95 to 60 parts of an olefinically unsaturated carboxylic acid. In the process, an aqueous phase which contains the olefinically unsaturated carboxylic acid, polymerisation initiator and 100 to 75% of the polysaccharide is metered into a dispension of 0 to 25% of the polysaccharide in a hydrophobic solvent at a temperature of from 40 to 100C. The polymerisation results in a uniformly fine product with a narrow particle size distribution. The product shows a rapid and high liquid absorption and is especially suitable for incorporation in cellulose-containing absorbent hygiene articles, such as dispos- able diapers and sanitary towels.

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