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:
Dec. 03, 2019
Filed:
Jan. 30, 2012
Kozo Nogi, Kanagawa, JP;
Masatoshi Nakamura, Hyogo, JP;
Hirofumi Shibata, Hyogo, JP;
Koji Honda, Hyogo, JP;
Yusuke Watanabe, Hyogo, JP;
Satoshi Matsumoto, Hyogo, JP;
Reiko Nakatsuru, Hyogo, JP;
Kunihiko Ishizaki, Hyogo, JP;
Kozo Nogi, Kanagawa, JP;
Masatoshi Nakamura, Hyogo, JP;
Hirofumi Shibata, Hyogo, JP;
Koji Honda, Hyogo, JP;
Yusuke Watanabe, Hyogo, JP;
Satoshi Matsumoto, Hyogo, JP;
Reiko Nakatsuru, Hyogo, JP;
Kunihiko Ishizaki, Hyogo, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
From a view pint of decreasing an out of spec product after surface crosslinking, particularly, when an alkylene carbonate compound is used as a surface crosslinking agent, influence due to an air temperature is great, and it is necessary to reduce ethylene glycol which is produced as a byproduct. There is provided a process for producing a polyacrylic acid (salt)-based water absorbent resin powder, comprising storing a non-polymerized organic compound being a raw material (modified raw material) of a water absorbent resin powder in a heated state, thereafter, mixing the non-polymerized organic compound with other compound at a predetermined ratio and, further, mixing the mixture into a water absorbent resin powder.