Abstract: The new .beta.-modification of the pigment 4,4'-diamino-3,3'-dibromo-1,1'-dianthraquinonyl, having characteristic lines in the X-ray diagram (Guinier/De Wolff, Cu K.alpha..sub.1 -radiation) according to the FIG. 1 has significant dyeing advantages over the known .alpha.-modification.

Abstract: 1:2 metal complexes of the formula ##STR1## wherein each of R.sub.1 and R.sub.3 is independently hydrogen or nitro, with the proviso that when a ring has two nitro groups, they are meta to each other,each of R.sub.2 and R.sub.4 is independently hydrogen, chloro or --SO.sub.3 M,each of R.sub.5 and R.sub.6 is independently hydrogen, --COR.sub.7, --CONHR.sub.8 or --SO.sub.2 R.sub.9,wherein R.sub.7 is C.sub.1-6 alkyl, C.sub.1-6 alkoxy, phenyl(C.sub.1-4 -alkyl) or phenyl(C.sub.1-4 -alkyl) the phenyl group of which is substituted by 1 or 2 substituents selected from halo, C.sub.1-4 -alkyl, C.sub.1-4 alkoxy, nitro, amino, --COOM, --SO.sub.3 M and acetamido,R.sub.8 is hydrogen, C.sub.1-6 alkyl; phenyl; phenyl substituted by 1 or 2 substituents selected from halo, C.sub.1-4 -alkyl, C.sub.1-4 alkoxy, nitro, amino, --COOM, --SO.sub.3 M and acetamido; naphthyl or naphthyl monosubstituted by chloro, amino, phenylamino, acetamido, benzamido or --SO.sub.3 M, andR.sub.9 is C.sub.

Abstract: 1:2 metal complexes of the formula ##STR1## wherein each of R.sub.1 and R.sub.3 is independently hydrogen or nitro, with the proviso that when a ring has two nitro groups, they are meta to each other,each of R.sub.2 and R.sub.4 is independently hydrogen, chloro or --SO.sub.3 M,each of R.sub.5 and R.sub.6 is independently hydrogen, --COR.sub.7, --CONHR.sub.8 or --SO.sub.2 R.sub.9,whereinR.sub.7 is C.sub.1-6 alkyl, C.sub.1-6 alkoxy, phenyl(C.sub.1-4 -alkyl) or phenyl (C.sub.1-4 alkyl) the phenyl group of which is substituted by 1 or 2 substituents selected from halo, C.sub.1-4 -alkyl, C.sub.1-4 alkoxy, nitro, amino, --COOM, --SO.sub.3 M and acetamido,R.sub.8 is hydrogen; C.sub.1-6 alkyl; phenyl; phenyl substituted by 1 or 2 substituents selected from halo, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, nitro, amino, --COOM, --SO.sub.3 M and acetamido; naphthyl or naphthyl monosubstituted by chloro, amino, phenylamino, acetamido, benzamido or --SO.sub.3 M, andR.sub.9 is C.sub.

Abstract: A compound of formula I ##STR1## in which each R.sub.1 independently is selected from oxygen, .dbd.NH or .dbd.N--R.sub.2 where R.sub.2 is an aromatic or heteroaromatic group, provided not more than two groups R.sub.1 are selected from oxygen and .dbd.NH.

Abstract: A pigment, which retains a crystal or particulate structure throughout a process of coloration of a substrate, containing one or more 2,2,6,6-tetraalkylpiperidine groups.

Abstract: A pigment, which retains a crystal or particulate structure throughout a process of coloration of a substrate, containing one or more 2,2,6,6-tetraalkylpiperidien groups.

Abstract: Complexes of the formula ##STR1## wherein each R.sub.1 is independently a monocyclic or fused ring aromatic or heteroaromatic group free of water-solubilizing groups,each R.sub.2 is independently is phenyl or methyl, andMe is Ni, Cu, Co or Zn, are useful as pigments for, for example, the mass pigmenting of synthetic plastics and resins, surface coatings and inks, pigment printing, textile coating and pigmenting paper in the mass.

Abstract: Disclosed is mass-dyed polyester comprising, as dyestuff, a compound or mixture of compounds of formula I ##STR1## wherein R.sub.1 is a direct bond, --CONH-- or --NHCO--, R.sub.2 is alkyl, phenyl or naphthyl, optionally substituted or cyano, provided that R.sub.1 is a direct bond when R.sub.2 is cyano, and R.sub.3 is hydrogen, methyl, ethyl, alkoxy-C.sub.1-3 -carbonyl or --CH.dbd.CH--CH.dbd.CH-- bound in the 1,2-position.

Abstract: The present invention relates to the compounds of formula I ##STR1## and metal complexes thereof, in which both R.sub.1 's are hydrogen or halogen or form a condensed ring of the benzene series, or --S--CH.sub.2 CH.sub.2 --S--, andR.sub.3 is hydrogen, a mono- or dicyclic-aromatic group or is a divalent radical of the phenylene or naphthalene series linking one further compound of formula I, wherein R.sub.3 is a direct bond and the R.sub.1 groups are the same as or different from the R.sub.1 groups of the first compound of formula I,which metal complexes are either 1:1 metal complexes when R.sub.3 is a divalent linking radical, or 1:2 metal complexes of monomeric compounds of formula I such 1:2 complexes being symmetric or asymmetric and the metal is a divalent transition metal, the complexes are useful as pigments.

Abstract: Disclosed are pigments, being co-condensate mixtures of compounds of formula I, ##STR1## wherein R.sub.1 is chlorine, bromine, fluorine, methyl, methoxy or ethoxy, preferably chlorine or methyl,R.sub.2 is hydrogen or has one of the significances of R.sub.1, preferably hydrogen, chlorine or methyl,At least two of the compounds in said mixture being present in an amount of at least 0.1 mol per mol of mixture.