Title:
METHOD FOR PRODUCING WATER-SOLUBLE POLYMER AND METHOD FOR PRODUCING WATER-ABSORBING RESIN
Document Type and Number:
WIPO Patent Application WO/2022/211000
Kind Code:
A1
Abstract:
The present invention provides a method for highly efficiently producing a water-soluble polymer and a method for producing a water-absorbing resin having excellent ability to absorb water. The method for producing a water-soluble polymer comprises step (a1) in which starch is reduced in molecular weight to thereby obtain a partial-starch-decomposition product and step (a2) in which an ionic functional group is introduced into the partial-starch-decomposition product obtained in the step (a1).
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Inventors:
OTA KUSUO (JP)
NOZAKI TAKAHIRO (JP)
TANAKA ATSUSHI (JP)
HOSOMI TETSUYA (JP)
NISHIMOTO TOMOYUKI (JP)
MIYATA MANABU (JP)
NOZAKI TAKAHIRO (JP)
TANAKA ATSUSHI (JP)
HOSOMI TETSUYA (JP)
NISHIMOTO TOMOYUKI (JP)
MIYATA MANABU (JP)
Application Number:
PCT/JP2022/016403
Publication Date:
October 06, 2022
Filing Date:
March 31, 2022
Export Citation:
Assignee:
NAGASE & CO LTD (JP)
NAGASE CHEMTEX CORP (JP)
HAYASHIBARA CO (JP)
NAGASE CHEMTEX CORP (JP)
HAYASHIBARA CO (JP)
International Classes:
C08B31/12; C08H99/00
Foreign References:
| JPS5939300A | 1984-03-03 | |||
| JPS5931699A | 1984-02-20 | |||
| JP2005075815A | 2005-03-24 | |||
| US4321364A | 1982-03-23 | |||
| CN108456256A | 2018-08-28 | |||
| JP2019056071A | 2019-04-11 | |||
| JP2002504508A | 2002-02-12 | |||
| JP2017523277A | 2017-08-17 | |||
| JP2012012462A | 2012-01-19 | |||
| JPS6055522B2 | 1985-12-05 | |||
| JPS6195006A | 1986-05-13 | |||
| US5079354A | 1992-01-07 | |||
| JP2010504414A | 2010-02-12 | |||
| JP2007222704A | 2007-09-06 |
Other References:
"Starch Chemistry Handbook", 1 March 1978, ASAKURA PUBLISHING CO., LTD., JP, article ANONYMOUS: "23.14.1 Separation method", pages: 520 - 521, XP009540088
PFEIFFER K, HEINZE TH, LAZIK C W: "Starch Derivatives of High Degree of Functionalization 5. Stepwise Carboxymethylation of Amylose*", CHEMICK ZVESTI - CHEMICAL PAPERS., VEDA, BRATISLAVA., SK, vol. 56, no. 4, 1 January 2002 (2002-01-01), SK , pages 261 - 266, XP055972228, ISSN: 0366-6352
PFEIFFER K, HEINZE TH, LAZIK C W: "Starch Derivatives of High Degree of Functionalization 5. Stepwise Carboxymethylation of Amylose*", CHEMICK ZVESTI - CHEMICAL PAPERS., VEDA, BRATISLAVA., SK, vol. 56, no. 4, 1 January 2002 (2002-01-01), SK , pages 261 - 266, XP055972228, ISSN: 0366-6352
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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