Method for production of particulate hydrogel polymer and absorbent resin
AssigneeNippon Shokubai Co., Ltd.
InventorsYoshio Irie, Takumi Hatsuda, Koichi Yonemura, Kazumasa Kimura
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Abstract
A method for the production of a particulate hydrogel polymer by the exposure of a hydrogel polymer possessing a cross-linked structure to shear force in a vessel thereby finely dividing said hydrogel polymer, which method comprises exerting shear force repeatedly on said hydrogel polymer while keeping said hydrogel polymer at a temperature in the range of from 40.degree. to 110.degree. C. under a mechanical pressure in the range of from 0.01 to 1.5 kg/cm.sup.2, and method for the production of an absorbent resin comprising drying the resultant particulate hydrogel polymer.
Claims17
A method for the production of a particulate hydrogel polymer by the exposure of a hydrogel polymer possessing a cross-linked structure to shear force in a vessel thereby finely dividing said hydrogel polymer, which method comprises exerting shear force repeatedly on said hydrogel polymer while keeping said hydrogel polymer at a temperature in the range of from 40.degree. to 110.degree. C. and applying a load on said hydrogel polymer in the range of from 0.01 to 1.5 kg/cm.sup.2, wherein said vessel has an inner volume 1.1 to 1.8 times the volume of said hydrogel polymer.
A method for the production of an absorbent resin which comprises excerting shear force repeatedly on a hydrogel polymer possessing a cross-linked structure while keeping said hydrogel polymer at a temperature in the range of from 40.degree. to 110.degree. C. under mechanical pressure in the range of from 0.01 to 1.5 kg/cm.sup.2 thereby finely dividing said hydrogel polymer into a particulate hydrogel polymer, and drying the resultant particulate hydrogel polymer.
Dependencies are inferred from the claim text.