Title:
STORAGE METHOD AND USAGE METHOD FOR POLYCARBOXYLIC ACID-BASED POLYMER SOLUTION
Document Type and Number:
WIPO Patent Application WO/2022/079946
Kind Code:
A1
Abstract:
The present invention provides a storage method for a polycarboxylic acid-based copolymer solution that makes it possible to suppress cloudiness and thickening of the polycarboxylic acid-based copolymer solution after storage. The present invention is a method for storing a polycarboxylic acid-based polymer solution, the storage method for a polycarboxylic acid-based polymer solution being characterized in that: the polycarboxylic acid-based polymer has a weight-average molecular weight of 1,000-20,000, has a neutralization rate of no more than 15 mol% per 100 mol% of the total of carboxyl groups and salts thereof contained in the polycarboxylic acid-based polymer, and contains 85-100 mol% of a structural unit derived from an unsaturated carboxylic acid-based monomer per 100 mol% of the structural units derived from all monomers; and the storage temperature in the storage method is at least 40°C.
Inventors:
SHIMIZU IKUO (JP)
SAKAMOTO NOBORU (JP)
SAKAMOTO NOBORU (JP)
Application Number:
PCT/JP2021/022639
Publication Date:
April 21, 2022
Filing Date:
June 15, 2021
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C08F6/06; C08F20/04
Domestic Patent References:
| WO2016043248A1 | 2016-03-24 | |||
| WO2016104261A1 | 2016-06-30 |
Foreign References:
| JP2000198809A | 2000-07-18 | |||
| JP2020084074A | 2020-06-04 | |||
| JP2014505753A | 2014-03-06 | |||
| JP2016160288A | 2016-09-05 | |||
| JP2016176029A | 2016-10-06 | |||
| JP2014505753A | 2014-03-06 | |||
| JP6027297B1 | 2016-11-16 |
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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