Mixed crystal and colored pigment dispersion composition

C - Chemistry – Metallurgy – 09 – B

Patent

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C09B 67/00 (2006.01)

Patent

CA 2719621

The present invention provides a mixed crystal having absorption properties that are excellent for color repro-ducibility as a blue pigment, and including a compound represented by the following Formula (I) and a compound represented by the following Formula (II), and a colored pigment dispersion composition including the mixed crystal and a medium. In Formula (I), X represents -SO-Z, -SO2-Z, -SO2NR1R2, -SO3R1, -CONR1R2 or -CO2R1; Z, R1 and R2 each independently represent an alkyl group, an aryl group, a heterocyclic group or the like; Y represents a monovalent substituent; M1 represents a hydrogen atom, a metal element or the like; and a and b are integers from 0 to 16 and satisfy the relationship of 0<=a + b<=16. In Formula (II), G1 to G4 and Q1 to Q4 each independently represent a carbon atom or a nitrogen atom, and A1 to A4 each independently represent a group of atoms necessary for forming an aromatic ring or heterocycle with the respective G1 to G4 and Q1 to Q4. Here, at least one ring among the four rings to be formed is a heterocycle. Each aromatic ring or heterocycle may have a substituent; M2 represents a hydrogen atom, a metal element or the like.

L'invention concerne un cristal mixte présentant des propriétés d'absorption qui sont excellentes pour reproduire des couleurs, notamment un pigment bleu. Ce cristal comprend un composé de formule (I) et un composé de formule (II). L'invention concerne également une composition de dispersion à pigment coloré comprenant ledit cristal mixte et un fluide. Dans la formule (I), X désigne -SO-Z, -SO2-Z, -SO2NR1R2, -SO3R1, -CONR1R2 ou -CO2R1; Z, R1 et R2 désignent chacun indépendamment un groupe alkyle, un groupe aryle, un groupe hétérocyclique ou analogue; Y désigne un substituant monovalent; M1 désigne un atome d'hydrogène, un élément métallique ou analogue; et a et b sont des nombres entiers compris entre 0 et 16, qui satisfont la relation: 0=a + b=16. Dans la formule (II), G1 à G4 et Q1 à Q4 désignent chacun indépendamment un atome de carbone ou un atome d'azote, et A1 à A4 désignent chacun indépendamment un groupe d'atomes nécessaires pour former un anneau aromatique ou un hétérocycle avec leur G1 à G4 et Q1 à Q4 respectif. Selon l'invention, au moins un anneau parmi les quatre anneaux à former est un hétérocycle. Chaque anneau aromatique ou hétérocycle peut présenter un substituant; M2 désigne un atome d'hydrogène, un élément métallique ou analogue.

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