Title:
METHOD FOR PRODUCING VINYL AMINE UNIT-CONTAINING POLYMER SOLUTION
Document Type and Number:
WIPO Patent Application WO/2014/069571
Kind Code:
A1
Abstract:
Provided is a method for efficiently producing on an industrial scale a high-performance polyvinylamine solution having good handling properties. After producing a polymer containing N-vinylcarboxamide monomer units having a value of the weight average molecular weight (Mw)/number average molecular weight (Mn) of 5 or higher by aqueous solution standing adiabatic polymerization, the polymer is hydrolyzed in an aqueous solvent in the presence of an alkali and an antigelling agent. In a preferred embodiment of the present invention, a polymer powder having a volatile content of 0.1-12 mass% is obtained by drying and pulverizing after producing a (co)polymer, and the powder obtained is stored or transported to the site of use of the polymer solution and hydrolyzed in an aqueous solvent in the presence of an alkali and an antigelling agent when the polymer solution is needed or at the site of use of the polymer solution.
Inventors:
ISHII AKIHIRO (JP)
MORI YASUHARU (JP)
MORI YASUHARU (JP)
Application Number:
PCT/JP2013/079554
Publication Date:
May 08, 2014
Filing Date:
October 31, 2013
Export Citation:
Assignee:
MITSUBISHI RAYON CO (JP)
International Classes:
C08F8/12; C08F26/02
Foreign References:
JP2006257287A | 2006-09-28 | |||
JP2004027015A | 2004-01-29 | |||
JP2010059220A | 2010-03-18 | |||
US6797785B1 | 2004-09-28 | |||
JP2004027015A | 2004-01-29 | |||
JP2010059220A | 2010-03-18 |
Other References:
See also references of EP 2915823A4
Attorney, Agent or Firm:
OKADA, KAZUHIKO (JP)
Kazuhiko Okada (JP)
Kazuhiko Okada (JP)
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