Diketopyrrolopyrrole pigment composition for use in color filters
AssigneeClariant Finance (BVI) Limited
InventorsTanja Reipen, Jens Reichwagen, Matthias Ganschow, Carsten Plueg, Lars Schneider
Life of this patent
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Abstract
The invention relates to a pigment composition that is composed of compounds of formulas (I), (II) and (III), is characterized by a average particle size d50 ranging from 10 to 60 nm, less than 5% by volume of the particles being greater than 70 nm, and can be obtained by reacting of 1 mol of a succinic acid diester with 2 mol of a mixture of nitriles A-CN and B-CN nitriles, the molar ratio of A-CN and B-CN in the nitrile mixture being in the range from 99.5:0.5 to 85.0:15.
Claims19
A pigment composition of compounds of the formulae (I), (II) and (III), wherein the pigment composition has a median particle size (d50) in the range from 10 to 60 nm, and less than 5% by volume of the particles being greater than 70 nm,
- obtained by reacting 1 mol of a succinic diester with 2 mol of a nitrile mixture A-CN and B-CN, the molar ratio of A-CN and B-CN in the nitrile mixture being in the range from 99.5:0.5 to 85.0:15, relative to each other, A-CN being 4-chlorobenzonitrile and B-CN being a nitrile of the formula (IV)
- wherein
- n is a number from 0 to 4;
- and
- X is OH, F, Cl, Br, CN, CF3, nitro, C1-C8-alkyl, C5-C7-cycloalkyl C2-C8-alkenyl, C1-C8-alkoxy, phenyl or benzyl.
A pigment composition of pigments of the formulae (I), (II) and (III), wherein the pigment composition has a median particle size (d50) in the range from 10 to 60 nm, and less than 5% by volume of the particles being greater than 70 nm
- where
- n is a number from 0 to 4;
- and
- X is OH, F, Cl, Br, CN, CF3, nitro, C1-C8-alkyl, C5-C7-cycloalkyl, C2-C8-alkenyl, C1-C8-alkoxy, phenyl, benzyl;
- and containing at least one dispersant, wherein the at least one dispersant is an unlaked sulfo-containing monoazo dye.
Dependencies are inferred from the claim text.