Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Dainichiseika Color & Chemicals

Kazutaka Aoki

Shotoku Takami

Hideki Ito

Ryo Hoshino

Kazuhiko Kaneko

Michiei Nakamura

Hisao Okamoto

Hiroaki Saikatsu

Yutaka Nakagawa

Shigeru Takarada

Keiji Nakajima

Takayuki Soga

Yukio Kanbara

Masahiko Aoba

Shirou Yamamiya

Shigeru Ohki

Nobuto Wada

Pigment compositions each contain an organic pigment and at least one compound selected from compounds represented by the following formula (II), respectively:A-N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E,B&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E orC&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E,wherein A represents a substituted or unsubstituted phenyl group, B represents a substituted or unsubstituted &#x3b2;-naphthyl group, C represents a substituted or unsubstituted &#x3b1;-anthraquinonyl group, D represents a particular substituted aromatic group, and E represents a substituted or unsubstituted phenyl group, with a proviso that the compounds each have at least one substituent represented by &#x2014;COOM or &#x2014;SOM in which M represents a hydrogen atom, metal atom, ammonium group, organic amine group or quaternary ammonium group. Colored compositions making use of the pigment compositions and color filters making use of the colored compositions are also disclosed.

Pigment compositions, colored compositions making use of the pigment compositions, and color filters

Pigment compositions each contain an organic pigment and at least one compound selected from compounds represented by the following formulas (I) or (II), respectively:A-N&#x2550;N-D, B&#x2014;N&#x2550;N-D or C&#x2014;N&#x2550;N-D&#x2003;&#x2003;Formula (I)A-N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E,B&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E orC&#x2014;N&#x2550;N&#x2014;CH(COCH)&#x2014;CONH-E&#x2003;&#x2003;Formula (II)wherein A represents a substituted or unsubstituted phenyl group, B represents a substituted or unsubstituted &#x3b2;-naphthyl group, C represents a substituted or unsubstituted &#x3b1;-anthraquinonyl group, D represents a particular substituted aromatic group, and E represents a substituted or unsubstituted phenyl group, with a proviso that the compounds each have at least one substituent represented by &#x2014;COOM or &#x2014;SOM in which M represents a hydrogen atom, metal atom, ammonium group, organic amine group or quaternary ammonium group. Colored compositions making use of the pigment compositions and color filters making use of the colored compositions are also disclosed.

Pigment dispersants and pigment compositions containing the same

A pigment composition comprises a wet-ground pigment mixture of (A) &egr;-copper phthalocyanine and (B) at least one pigment selected from a group consisting of condensed polycyclic pigments and azo pigments. The weight ratio of thecomponent (A) to the component (B) is 100:0.1 to 100:50. The pigment composition can be produced by wet-grinding (A-1) &agr;-copper phthalocyanine and the component (B) at a weight ratio of from 100:0.1 to 100:50 in a non-aromatic solvent. A colorant comprises the pigment composition and at least one component selected from the group consisting of film-forming resins and liquid media. A colored article can be obtained using the colorant as a coloring agent.

Pigment compositions, production process thereof, colorants, and colored articles

A composite pigment of a bluish green color comprises copper phthalocyanine and aluminum phthalocyanine which are preferably in the form of a mixture or solid solution. The composite pigment can be produced by mixing copper phthalocyanine and aluminum phthalocyanine into a mixture and then converting said mixture into a pigment form. A coloring composition comprises at least a resin and a pigment which comprises copper phthalocyanine and aluminum phthalocyanine. The coloring composition can be produced by mixing copper phthalocyanine and aluminum phthalocyanine which have been independently comminuted, into a composite pigment, and then kneading the pigment and a resin such that the pigment is dispersed in the resin. An image recording substance is produced using the coloring composition. The image recording substance can be a dry developer of a fine powder form or a wet developer of a liquid form, an ink-jet ink, or a thermal transfer ink ribbon with the coloring composition coated on a film-shaped or sheet-shaped base material.

Composite pigments, coloring compositions, and image recording substances

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Tokyo, Japan

Kazutaka Aoki