Method for producing water-absorbent resin powder and production apparatus therefor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11465126
APP PUB NO 20190329219A1
SERIAL NO

16349709

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The production method includes: a gel-crushing step of grinding a crosslinked hydrogel polymer to obtain a particulate crosslinked hydrogel polymer; a heating drying step of obtaining dried particles from the particulate crosslinked hydrogel polymer by using a continuous stirring drying machine; a post-crosslinking step of post-crosslinking the particulate crosslinked hydrogel polymer or the dried particles; and a sizing step of adjusting a particle size of the dried particles or the post-crosslinked dried particles to obtain water-absorbent resin powder. The particulate crosslinked hydrogel polymer contains a gel fluidizer. A gel temperature of the particulate crosslinked hydrogel polymer containing the gel fluidizer, the gel temperature being measured by a contact thermometer, is not lower than 50° C. In the production method, the dried particles or the post-crosslinked dried particles is forcedly cooled before the sizing step.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • NIPPON SHOKUBAI CO LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Adachi, Yoshifumi Himeji, JP 32 628
Arake, Tomoyuki Himeji, JP 4 3
Fujino, Shin-ichi Himeji, JP 16 227
Hayashi, Hiroki Himeji, JP 225 2813
Honda, Koji Himeji, JP 42 246
Imura, Motohiro Himeji, JP 24 572
Inoue, Masafumi Himeji, JP 109 645
Ishizaki, Kunihiko Himeji, JP 112 2347
Katakura, Naoki Himeji, JP 3 2
Katsube, Shin-ya Himeji, JP 4 3
Sato, Mai Himeji, JP 7 5
Shobo, Yoshihiro Himeji, JP 7 14
Shuto, Tokio Suita, JP 4 5
Wakabayashi, Ryota Himeji, JP 11 19
Watabe, Hiroyasu Himeji, JP 4 14
Yorino, Tsuyoshi Himeji, JP 6 11

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Apr 11, 2026
7.5 Year Payment $3600.00 $1800.00 $900.00 Apr 11, 2030
11.5 Year Payment $7400.00 $3700.00 $1850.00 Apr 11, 2034
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00