Abstract: A pigment preparation comprising C.I. Pigment Yellow 74 of formula (I) as base pigment and C.I. Pigment Yellow 62 of formula (II) as pigment dispersant.

Abstract: The invention relates to the use of a pigment composition containing between 86.0 and 99.9 total mol % of C.I. Pigment Yellow 74 molecules and between 14.0 and 0.1 total mol % of at least one monoazo pigment of the formula (1) wherein R1 represents Cl, OCH3, OH3 or NO2 as a coloring agent for pigmenting ink-jet inks and color filters.

Abstract: The invention relates to the use of pigment preparations comprising C.I. Pigment Yellow 74 as base pigment and one or more pigment dispersants of the formula (I) wherein R1, R2, R3, R4, R5, and R6 independently represent hydrogen, halogen, such as chlorine or bromine, C1-C4 alkyl, such as methyl, ethyl or tert-butyl, C1-C4 alkoxy, such as methoxy or ethoxy, nitro, trifluoromethyl, cyano, phenyl, a group SO3?E+- or COO?E+, provided that there is at least one and no more than two ionic groups of type SO3?E+- or COO?E+ are supplied, one group being located in the coupling radical and the other being located in the base radical of the compound of the formula (I) in case two ionic groups are supplied, E+ represents H+, the equivalent Mm+/m of a metal cation Mm+, m representing one of the numbers 1, 2, or 3 a phosphonium ion; or an unsubstituted or substituted ammonium ion, for pigmenting electrophotographic toners and developers, inks, aqueous binder systems, and color filters.

Abstract: A method for the production of a diazo pigment, or a mixture of diazo pigments, according to formula (I) of the specification by azo coupling, wherein the azo coupling product is subjected to a finish in an organic solvent or in an agueous organic solvent with a neutral or alkaline pH.

Abstract: The invention relates to a powdery dye composition consisting essentially of C.I. Pigment Red 170 (C.I. No. 12475) and barium sulfate, wherein the barium sulfate is added before or during the production process of the C.I. Pigment Red 170. The inventive addition of barium sulfate enables non-homogeneities and caking to be avoided in the mixture.

Abstract: Diketopyrrolopyrroles of the formula (I): wherein R1, R2, R3 and R4 independently of one another are a C1–C4 alkyl radical or a substituted or unsubstituted phenyl radical, wherein the phenyl radical can be substituted by 1, 2, 3 or 4 substituents from the group C1–C4 alkyl, C1–C4 alkoxy, CN, F, Cl, Br, NO2, CF3, S—C1–C4 alkyl, phenyl or (C1–C2)alkylenephenyl, with the proviso that at least one of the radicals, R1, R2, R3, or R4, is one of the stated substituted or unsubstituted phenyl radicals.

Abstract: This invention relates to azo pigments of general formula (I) wherein D represents the radical of a diazo component; R1 and R2 are the same or different and represent hydrogen, a C1-C4 alkyl radical which is optionally substituted by hydroxy, amino, halogen or methoxy, or a (C6-C10) aryl radical which is optionally substituted by one, two or three substituents from the group C1-C4 alkyl, C1-C4 alkoxy, F, Cl, Br, CF3, NO2, OH, CONH2, CONH(C1-C4 alkyl), CON(C1-C4 alkyl)2, COO(C1-C4 alkyl), SO2NH2, SO2NH(C1-C4 alkyl) and SO2N(C1-C4 alkyl)2, provided that R1 and R2 do not simultaneously represent hydrogen; R4 represents hydrogen, C1-C4 alkyl, halogen, trifluoromethyl, C1-C4 alkoxy, NO2, or CN; and n represents 1, 2 or 3

Abstract: This invention relates to azo pigments of general formula (I) wherein D represents the radical of a diazo component; R1 and R2 are the same or different and represent hydrogen, a C1-C4 alkyl radical which is optionally substituted by hydroxy, amino, halogen or methoxy, or a (C6-C10) aryl radical which is optionally substituted by one, two or three substituents from the group C1-C4 alkyl, C1-C4 alkoxy, F, Cl, Br, CF3, NO2, OH, CONH2, CONH(C1-C4 alkyl), CON(C1-C4 alkyl)2, COO(C1-C4 alkyl), SO2NH2, SO2NH(C1-C4 alkyl) and SO2N(C1-C4 alkyl)2, provided that R1 and R2 do not simultaneously represent hydrogen; R4 represents hydrogen, C1-C4 alkyl, halogen, trifluoromethyl, C1-C4 alkoxy, NO2, or CN; and n represents 1, 2 or 3.