1
Takenori Funatsu, Yoichi Inuzuka, Tetsuo Mishina, Kenji Kitamura, Ataru Chiba: Phthalocyanine pigment compositions. Toyo Ink Manufacturing, Jordan and Hamburg, September 9, 1980: US04221606 (19 worldwide citation)

A phthalocyanine pigment composition comprising (A) 100 parts by weight of phthalocyanine pigment, (B) a specific phthalocyanine derivative and (C) a polyvalent metal salt of an anionic surface-active agent, the compounds (B) and (C) being contained in a molar ratio of 1:0.1-5 and totalling 0.5-30 p ...


2
Mikiya Kato, Ataru Chiba, Junichi Tsuchida: Pigment composition and aqueous pigment dispersion prepared therefrom. Toyo Ink Mfg, Oblon Spivak McClelland Maier & Neustadt P C, May 2, 2000: US06056814 (7 worldwide citation)

The present invention provide a pigment composition and a method for producing same at low cost, which has the same or more excellent quality compared with those produced by a salt milling process which has been commonly used. The pigment composition is produced by dry-milling a pigment in the prese ...


3
Ippei Imagawa, Ataru Chiba, Takahiro Yuasa: Pigment composition and printing ink containing the same. Toyo Ink Mfg, Wenderoth Lind & Ponack L, July 11, 2006: US07074268 (2 worldwide citation)

A pigment composition obtainable by dry-milling an organic pigment in the presence of a resin for a printing ink, the resin being composed of a synthetic resin for a printing ink in an amount of 10 to 80 parts by weight per 100 parts by weight of the organic pigment and an aliphatic hydrocarbon resi ...


4
Kenji Kitamura, Ataru Chiba: Pigment composition and aqueous pigment dispersion product using the same. Toyo Ink Mfg, Oblon Spivak McClelland Maier & Neustadt P C, April 30, 2002: US06379451 (2 worldwide citation)

There are disclosed a pigment composition comprising a dry-milled pigment, a water-soluble resin, and a nonionic surfactant composed of a compound having an acetylenic linkage; and a method for producing a pigment composition, comprising dry-milling a pigment containing coarse particles in the prese ...


5
Yoshio Muramatsu, Ataru Chiba, Hitoshi Maki: Process for the production of dis-azo pigment. Toyo Ink Manufacturing, Wenderoth Lind & Ponack, April 22, 1997: US05622555 (1 worldwide citation)

A process for the production of a dis-azo pigment having excellent dispersibility, high tinting strength and high masking strength, by a simple method under an improved working environment, which is improved in a drying step and can omit the pulverization step of a conventional process, the present ...


6
Yoshie Suzuki, Ataru Chiba, Kenji Kitamura, Akimitsu Mochizuki: Dispersant-containing disazo pigment composition. Toyo Ink Manufacturing, Wenderoth Lind & Ponack, July 23, 1991: US05034063

A disazo pigment composition which can provide a printing ink having excellent fluidity, gloss and storage stability, and which contains:


7
Ippei Imagawa, Ataru Chiba, Takahiro Yuasa: Pigment composition and printing ink containing the same. Wenderoth Lind & Ponack, June 2, 2005: US20050119369-A1

A pigment composition obtainable by dry-milling an organic pigment in the presence of a resin for a printing ink, the resin being composed of a synthetic resin for a printing ink in an amount of 10 to 80 parts by weight per 100 parts by weight of the organic pigment and an aliphatic hydrocarbon resi ...


8
Ippei Imagawa, Ataru Chiba: Process for the production of pigment composition and printing ink containing pigment composition obtained. Wenderoth Lind & Ponack, March 16, 2006: US20060058421-A1

A process for the production of a pigment composition comprising dry-milling an organic pigment in the presence of a resin, which process aims to improve dispersibility and dispersing stabilization and is capable of giving a pigment composition for a printing ink excellent in fluidity, wherein the r ...