Search International and National Patent Collections

1. (WO2017065063) PIGMENT COMPOSITION PRODUCTION METHOD

Pub. No.:    WO/2017/065063    International Application No.:    PCT/JP2016/079555
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Wed Oct 05 01:59:59 CEST 2016
IPC: C09B 67/54
B41M 5/00
C09B 67/20
C09B 29/33
Applicants: KAO CORPORATION
花王株式会社
Inventors: ABE, Shuichi
阿部 秀一
ODA, Tsuyoshi
小田 斉
IWASAKI, Toshiya
岩崎 俊哉
NARITA, Masayuki
成田 将之
Title: PIGMENT COMPOSITION PRODUCTION METHOD
Abstract:
The present invention relates to (1) a pigment composition production method that includes a step in which a raw material pigment composition containing PY74 and a specific byproduct is treated with an oxidizing agent, the content of the specific byproduct with respect to the content of PY74 in the treated pigment composition being 1,200 mg/kg or less, (2) a pigment composition production method that includes a step in which a raw material composition containing PY74 and a specific byproduct is treated with hydrogen peroxide, (3) a method for reducing the content of a byproduct within a raw material pigment composition containing PY74 and a specific byproduct by treating the raw material pigment composition with an oxidizing agent, and (4) a method for mixing a pigment composition produced by the abovementioned methods with an inkjet recording ink and thereby preventing discharge failure of the inkjet recording ink.