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1. (WO2018124120) CLEANING LIQUID FOR AQUEOUS INK

Pub. No.:    WO/2018/124120    International Application No.:    PCT/JP2017/046758
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 27 00:59:59 CET 2017
IPC: C11D 1/72
B41J 2/165
C11D 1/68
C11D 3/43
C11D 17/08
Applicants: KAO CORPORATION
花王株式会社
Inventors: SUZUKI, Takayuki
鈴木 啓之
UEDA, Yasufumi
植田 泰史
Title: CLEANING LIQUID FOR AQUEOUS INK
Abstract:
The present invention relates to a cleaning liquid for an aqueous ink including a pigment and a water-insoluble polymer. The cleaning liquid includes: an acetylene glycol (A) having an average number of added moles of ethylene oxide (EO) of 0-2 mol; at least one compound (B) selected from acetylene glycols having an average number of added moles of EO of 4 mol or higher, and polyethylene glycol alkyl ethers having alkyl groups with eight or more carbon atoms; a water-soluble organic solvent (C); and water. The water-soluble organic solvent (C) includes at least one water-soluble organic solvent having a boiling point of 90˚C or higher. The boiling point of the water-soluble organic solvent (C) is 250˚C or lower as a weighted average value. The water-soluble organic solvent (C) content is 20 mass% or lower. The present invention also relates to a production method for said cleaning liquid, and an aqueous ink cleaning method which uses said cleaning liquid.