	US 7,611,572 B2
	Pixel-forming colorant compositions and their use
Atsushi Nogami, Chuo-ku (Japan); Takami Minami, Chuo-ku (Japan); Shigeru Sakamoto, Chuo-ku (Japan); Hisao Okamoto, Chuo-ku (Japan); Yoshimasa Tsuchiya, Chuo-ku (Japan); Masanori Takakamo, Chuo-ku (Japan); Nakaji Komiyama, Chuo-ku (Japan); and Michiei Nakamura, Chuo-ku (Japan)
Assigned to Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo (Japan)
Filed on Mar. 15, 2006, as Appl. No. 11/276,811.
Claims priority of application No. 2005-092276 (JP), filed on Mar. 28, 2005; and application No. 2005-092277 (JP), filed on Mar. 28, 2005.
Prior Publication US 2006/0213394 A1, Sep. 28, 2006
Int. Cl. C09D 11/00 (2006.01); C09B 67/50 (2006.01); C08K 5/00 (2006.01); G03F 1/00 (2006.01)

U.S. Cl. 106—31.78 [106/410; 106/411; 106/412; 106/413; 430/7; 540/140]

13 Claims

1. A pixel-forming colorant composition comprising at least one green colorant selected from the group consisting of the following green pigment derivatives (A) and (B):

(A) a green pigment derivative obtained by introducing at least one sulfone group in a copper phthalocyanine green pigment obtained by reacting at least one of a phthalic acid substituted on average with from 3.5 to 4.0 bromine atoms and a derivative thereof with a copper salt, substituted on average with from 14 to 16 bromine atoms, and substituted with no chlorine atom;

(B) a green pigment derivative obtained by introducing at least one sulfone group in a copper phthalocyanine green pigment obtained by reacting a mixture, which comprises at least one of a phthalic acid having at least one bromine atom and a derivative thereof and at least one of a phthalic acid having at least one chlorine atom and a derivative thereof, with a copper salt, substituted on average with not less than 12 but less than 16 bromine atoms, and substituted on average with not more than 4 but more than 0 chlorine atom(s).