Title:
METHOD FOR PRODUCING AQUEOUS SOLUTION OF N-VINYL CARBOXYLIC ACID AMIDE COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2020/196234
Kind Code:
A1
Abstract:
Proposed is a method for producing an aqueous solution, which has a thickening property, of an N-vinyl carboxylic acid amide copolymer. This method for producing an aqueous solution of an N-vinyl carboxylic acid amide copolymer is characterized in that a liquid containing at least a non-hydrophilic monomer (B), which is at least one selected from acrylonitrile and methyl acrylate, and a liquid containing at least a polymerization initiator (D) are added dropwise to an aqueous solution of an N-vinyl carboxylic acid amide monomer (A), and polymerization is performed.
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Inventors:
SUGAWARA ATSUSHI (JP)
KONISHI JUN (JP)
KONISHI JUN (JP)
Application Number:
PCT/JP2020/012232
Publication Date:
October 01, 2020
Filing Date:
March 19, 2020
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C08F220/18; C08F2/16; C08F220/44; C08F226/02
Domestic Patent References:
| WO2016181993A1 | 2016-11-17 |
Foreign References:
| JP2004323548A | 2004-11-18 | |||
| JP2004331693A | 2004-11-25 | |||
| JPH01163208A | 1989-06-27 | |||
| JPH05294358A | 1993-11-09 | |||
| JPH08311385A | 1996-11-26 | |||
| JP3180659B2 | 2001-06-25 | |||
| JP3144087B2 | 2001-03-07 | |||
| JP2798736B2 | 1998-09-17 | |||
| JPH08311385A | 1996-11-26 |
Other References:
See also references of EP 3943519A4
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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