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1. (WO2017022459) METHOD OF USING AQUEOUS SOLUTION OF POLYMER COMPRISING VINYLAMINE UNITS

Pub. No.:    WO/2017/022459    International Application No.:    PCT/JP2016/071026
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Sat Jul 16 01:59:59 CEST 2016
IPC: C08F 8/12
Applicants: MITSUBISHI CHEMICAL CORPORATION
三菱ケミカル株式会社
Inventors: ISHII Akihiro
石井 明宏
MORI Yasuharu
森 康治
Title: METHOD OF USING AQUEOUS SOLUTION OF POLYMER COMPRISING VINYLAMINE UNITS
Abstract:
A method comprising producing N-vinylformamide, polymerizing a monomer ingredient comprising the N-vinylformamide to produce a polymer comprising N-vinylformamide units, hydrolyzing the polymer using an acid or a base to produce an aqueous solution of a polymer comprising vinylamine units, and using the aqueous solution, wherein the storage period (2) from immediately after the production of the polymer to just before initiation of the production of the aqueous solution of a polymer comprising vinylamine units is made longer than the storage period (3) from immediately after the production of the aqueous solution to just before the use.