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:
Nov. 30, 2010
Filed:
May. 01, 2007
Yuichiro Morimitsu, Himeji, JP;
Masatoyo Yoshinaka, Himeji, JP;
Shinji Kobayashi, Himeji, JP;
Sumitomo Seika Chemicals Co., Ltd., Hyogo, JP;
Abstract
An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles, which have a high bulk density and readily swell in water. The invention provides a method for producing a granular carboxyl group-containing polymer particle by producing a carboxyl group-containing polymer particle, preparing an aggregate of the carboxyl group-containing polymer particles by providing the carboxyl group-containing particles with moisture so that the carboxyl group-containing polymer particles absorb the moisture in an amount of 5 to 25% by weight and form the aggregate, drying the aggregate of the carboxyl group-containing polymer particles, and then grinding the dried aggregate.