The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2019
Filed:
Nov. 30, 2015
Unicharm Corporation, Ehime, JP;
Masashi Yamaguchi, Kagawa, JP;
Hiroshi Uyama, Osaka, JP;
Unicharm Corporation, Ehime, JP;
Abstract
Provided is a biodegradable water absorbent having high gel strength and exhibiting an excellent absorption factor and excellent liquid passage rate through a gel. A water absorbent comprising a cross-linked naturally derived polymer and a clay mineral, the water absorbent being characterized in that the cross-linked naturally derived polymer and the clay mineral form particles, the clay mineral is present in the interior of the particles, and the clay mineral content constitutes 10-100 parts by mass (when dry) relative to 100 parts by mass (when dry) of the cross-linked naturally derived polymer. It is possible to produce this water absorbent by preparing a starting material fluid in which the naturally derived polymer is dissolved and the clay mineral is dispersed, adding a cross-linking agent to the starting material fluid, and cross-linking the naturally derived polymer.