	US 12,448,531 B2
	Pigment composition, printing ink, and method for manufacturing pigment composition
Shumei Ji, Qingdao (CN); Issei Masuko, Kamisu (JP); Masaki Hosaka, Kamisu (JP); Kyoichi Okada, Kamisu (JP); Nagatoshi Kobayashi, Kamisu (JP); Xiyang Liao, Qingdao (CN); and Wei Zhao, Qingdao (CN)
Assigned to DIC CORPORATION, Tokyo (JP)
Appl. No. 18/009,403
Filed by DIC Corporation, Tokyo (JP)
PCT Filed Jun. 28, 2020, PCT No. PCT/CN2020/098546 § 371(c)(1), (2) Date Dec. 9, 2022, PCT Pub. No. WO2022/000130, PCT Pub. Date Jan. 6, 2022.
Prior Publication US 2023/0312948 A1, Oct. 5, 2023
Int. Cl. C09D 11/037 (2014.01); C09B 67/20 (2006.01); C09B 67/46 (2006.01); C09D 11/102 (2014.01); C09D 17/00 (2006.01); C09D 171/02 (2006.01)

CPC C09D 11/037 (2013.01) [C09B 67/0066 (2013.01); C09B 67/009 (2013.01); C09D 11/102 (2013.01); C09D 17/003 (2013.01); C09D 171/02 (2013.01)]

8 Claims

1. A method for manufacturing a pigment composition, comprising:

obtaining a pigment composition containing a disazo pigment by subjecting a diazo component and a coupler component to a coupling reaction in the presence of an alkylamine that has an alkyl group having a carbon number of 8 or more and a poly(oxyethylene) alkyl ester that has an alkyl group having a carbon number of 8 or more.