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1. (WO2017179268) AQUEOUS POLYIMIDE DISPERSION, BINDER FOR ELECTRODES, ELECTRODE, SECONDARY BATTERY AND METHOD FOR PRODUCING AQUEOUS POLYIMIDE DISPERSION

Pub. No.:    WO/2017/179268    International Application No.:    PCT/JP2017/003346
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Wed Feb 01 00:59:59 CET 2017
IPC: C08G 18/34
C08G 18/00
C08G 18/10
H01M 4/36
Applicants: DAI-ICHI KOGYO SEIYAKU CO., LTD.
第一工業製薬株式会社
Inventors: YOSHIOKA Takuya
吉岡 汰玖哉
WATANABE Toshiya
渡邊 聡哉
MIYAMURA Takeshi
宮村 岳志
ITO Shuichi
伊藤 修一
Title: AQUEOUS POLYIMIDE DISPERSION, BINDER FOR ELECTRODES, ELECTRODE, SECONDARY BATTERY AND METHOD FOR PRODUCING AQUEOUS POLYIMIDE DISPERSION
Abstract:
The objective of the present invention is to provide an aqueous polyimide dispersion that has high environmental suitability because of being an aqueous dispersion and does not require a facility, in which the aqueous polyimide dispersion is used, to have an explosion-proof structure, while forming a film that has good physical properties. The present invention relates to an aqueous polyimide dispersion which is obtained by reacting (A) an acid anhydride, (B) a polyisocyanate and (C) a compound having one or more active hydrogen groups and a hydrophilic group. The present invention also relates to a method for producing an aqueous polyimide dispersion, which comprises: a step for synthesizing a prepolymer by reacting (A) an acid anhydride, (B) a polyisocyanate and (C) a compound having one or more active hydrogen groups and a hydrophilic group; and a step for emulsifying the prepolymer in water.