The present invention relates to pigment preparations comprising polyamide particles with an average particle size of below 50 .mu.m and a pigment of an average particle size below 0.2 .mu.m. The inventive pigment preparations are useful for coloring high molecular weight material, like coatings, inks and in particular plastics like polyvinyl chloride, polyamide, polyester, polycarbonate and, especially polyamide fibers.

The disclosure relates to the use of conditioned organic pigments as stir-in pigments in various applications. The conditioned pigments are prepared by wet-milling a pigment crude to a particle size of 0.1 to 9 .mu.m and a specific surface area in the range of from 6 to 35 m.sup.2 /g.

Disclosed is a process for coloring high-molecular-weight coatings and ink systems which comprises uniformly dispersing an effective pigmenting amount of a stir-in pigment in the coating or ink system; wherein the stir-in pigment is an organic pigment crude consisting essentially of non-platelet-shaped particles having an average particle size of from 0.5 to 25 .mu.m and/or a pigment composition consisting essentially of an organic pigment having an average particle size of from 0.01 to 25 .mu.m...

The present invention relates to black pigment compositions comprising (a) carbon black, and (b) a compound of the formula (MO.sub.3S).sub.m-Q(CH.sub.2).sub.k--X].sub.n, (I) wherein Q is a pigment or pigment intermediate radical selected from the group of anthraquinone, perinone, perylene, diketopyrrolopyrrole, thioindigo, iminoisoindoline, iminoisoindolinone, quinacridone, 6,13-dihydroquinacridone, flavanthrone, dioxazine, indanthrone, anthrapyrimidine and quinophthalone, X is a cyclo hetero al...

An alpha-II form of a 1,4-diketo-3,6-di(4'-tertiary butyl phenyl)-2,5-dihydro pyrrolo[3,4-c]pyrrole pigment characterized by C.I.E color space values, particularly a high chroma value and yellow hue, in masstone, and a process for its preparation is disclosed. The 1,4-diketo-3,6-di(4'-tertiary butyl phenyl)-2,5-dihydro pyrrolo[3,4-c]pyrrole pigment is especially useful for coloring coating compositions, such as automotive paints, and plastics.

A 6,13-dihydroquinacridone derivative of formula I: wherein: Q represents a 6,13-dihydroquinacridone moiety of formula II; ##STR1## A and B each independently represent a substituent selected from H, F, Cl, C.sub.1 -C.sub.3 alkyl and C.sub.1 -C.sub.3 alkoxy M represents a metal cation, quaternary N cation or H; X is an aromatic group, a cyclo-hetero aliphatic group with at least one 5 or 6 atom ring or a hetero aromatic group with at least one 5 or 6 atom ring and which is not a phthalimido grou...

This invention relates to a resinated 2,9-dimethylquinacridone pigment, which is prepared by a process comprising (a) preparing an aqueous suspension containing a 2,9-dimethylquinacridone pigment, a mixture of water-soluble acid salts and a particle growth inhibitor, wherein the mixture of water-soluble acid salts consists essentially of from about 50 to about 95 parts by weight of a water-soluble resin acid salt, and from about 5 to about 50 parts by weight of a water-soluble salt of a naptheni...

The disclosure describes pigment compositions containing a small particle size porous filler and a pigment, and their use for preparing effect coating compositions which produce thin film finishes exhibiting strong lightness and color flop with a pronounced three dimensional effect. The thin film finishes are particularly interesting as automotive finishes.

A solid solution of 1,4-diketopyrrolo-[3,4-c]-pyrrols consisting of two different compounds of the formulae ##STR1## the formulae ##STR2## or the formulae ##STR3## wherein A is one of the groups ##STR4## and B, E and D are each independently a group ##STR5## where R.sub.1 and R.sub.2 are each independently hydrogen, halogen, C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy, --SR.sub.3, --N(R.sub.3).sub.2,--CF.sub.3,--CN, a group ##STR6## R.sub.3 is C.sub.1 -C.sub.5 -alkyl and R.sub.4 and R.sub....

A process for the preparation and conditioning of organic pigments, which comprises the use of at least one tricyclodecane alcohol or tricyclodecene alcohol.