US 7,347,894 B2
Pigment dispersants and their use
Hiromitsu Yanagimoto, Chuo-ku (Japan); Hiroaki Saikatsu, Chuo-ku (Japan); Naoto Kamata, Chuo-ku (Japan); Shigeru Sakamoto, Chuo-ku (Japan); Akio Yoshida, Chuo-ku (Japan); and Michiei Nakamura, Chuo-ku (Japan)
Assigned to Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo (Japan)
Filed on Apr. 06, 2006, as Appl. No. 11/398,654.
Claims priority of application No. 2005-121044 (JP), filed on Apr. 19, 2005.
Prior Publication US 2006/0241227 A1, Oct. 26, 2006
Int. Cl. C09B 67/20 (2006.01); C09B 67/00 (2006.01); C09B 67/22 (2006.01); C09B 67/36 (2006.01); C09B 67/46 (2006.01); C09B 33/00 (2006.01); C08K 5/13 (2006.01); G02B 5/20 (2006.01); G02B 5/22 (2006.01); G02F 1/13 (2006.01); G03F 7/00 (2006.01)
U.S. Cl. 106—496  [106/410; 106/413; 106/493; 106/494; 106/495; 106/497; 106/498; 106/499; 349/106; 353/84; 427/162; 430/7; 524/157; 524/190; 524/342; 534/588] 11 Claims
 
1. A pigment dispersant comprising the compound represented by the following formula (I) or a metal salt, ammonium salt, amine salt or alkylammoniumchloride salt thereof:

OG Complex Work Unit Drawing
wherein X is a substituted or unsubstituted aromatic or heterocyclic group having at least one of a sulfonic group; Y is an aromatic or heterocyclic group, said groups each may include one or more substitutes other than a sulfonic group; and Z is an aromatic or heterocyclic group, said groups each may include one or more substitutes other than a sulfonic group.