PROBLEM TO BE SOLVED: To provide a water-insoluble and water-swellable fiber, film or like molded articles which can be produced without fail by a large-scale high-speed production process and has absorption properties satisfactory as compared with those of conventional particulate water-swellable polymers. SOLUTION: This article is an extruded water-absorbing and water-insoluble fiber or film having a gel volume corresponding to 50g or above of deionized water per gram of the polymer. It is formed from a crosslinked copolymer of a water-soluble unsaturated monomer blend containing 50wt.% or above, based on the total monomer weight, carboxylic monomer in the form of a free acid, a salt of ammonium, an amine or an alkali metal, or a hydrolyzable ester. The crosslinkages are ester linkages formed between the carboxyl group and the hydroxyalkyl ester group.

Water-absorbing and water-insoluble polymer article
Application Number
Publication Number
Application Date
August 26, 1996
Publication Date
May 27, 1997
Flesher Peter
Farrar David
Allen Adrian S
Allied Colloids
D01F 06/36
C08J 03/24
C08F 220/28
C08F 220/06
B01J 20/28
B01J 20/26
A61F 13/46
C08J 05/18