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. 07, 2025
Filed:
May. 16, 2019
Nippon Shokubai Co., Ltd., Osaka, JP;
Tsuyoshi Yorino, Himeji, JP;
Naoki Katakura, Suita, JP;
Hiroki Hayashi, Himeji, JP;
Sumito Kumagai, Himeji, JP;
Masahumi Inoue, Himeji, JP;
Tomoyuki Arake, Himeji, JP;
Mai Sato, Himeji, JP;
Ryota Wakabayashi, Himeji, JP;
Yoshihiro Shobo, Suita, JP;
Shin-ya Katsube, Himeji, JP;
Yoshifumi Adachi, Himeji, JP;
Satoshi Matsumoto, Himeji, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
The present invention addresses the problem of providing; a water absorbent resin powder having a reduced amount of fine powder generated and a reduced amount of fine powder recovered; and a production method for the water absorbent resin. The production method of the present invention includes a drying step and a fine powder granulation step. The drying step is for obtaining a dried polymer by drying a particulate water-containing gel crosslinked polymer which is obtained using an acid group-containing unsaturated monomer as a main component. The fine powder granulation step is for obtaining a fine powder granulated product by adding a binder and an adhesion control agent to a fine powder made of a water absorbent resin. In this production method, the obtained fine powder granulated product is recovered in the drying step or in any step before the drying step.