Abstract: The invention relates to a method for production of an aqueous dispersion of polymer-encapsulated pigments characterized in that (a) an aqueous pigment dispersion, containing at least one organic pigment (P) at least one surfactant (T), and water is prepared,(b) a monomer miniemulsion stabilized by a hydrophobic organic compound with a water solubility at 20° C. of not more than 5×10?5 g/l, is prepared from a polymerizable monomer (M) and at least one surfactant (T), in water, (c) a monomer pigment emulsion is prepared, whereby the aqueous pigment dispersion from (a) and the monomer miniemulsion from (b) are mixed and homogenized, and (d) the pigment-containing monomer miniemulsion from (c) is polymerized in the presence of a polymerization initiator and/or by heat, whereupon an encapsulation of the pigment with the polymer thus formed occurs.

Abstract: The present invention relates to a pigment composition composed of compounds of the formula (I), (II) and (III) with a novel crystal modification, to their preparation and to the use of this novel product as a pigment. For many applications of organic pigments, for example the coloring of metallic lacquers or the use thereof in color filters, a very high transparency is required. To produce color filters, for example, particularly fine pigments are used, in order to substantially rule out the particle scattering which leads to a lowering of the contrast ratio. The commercially available products, however, do not always meet all requirements of the art. More particularly, there was a need for improvement with regard to the transparency and the associated fineness of the pigment crystals, and also the color purity (chroma).

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.

Abstract: The invention relates to cocrystals of compounds of the formulae (I), (II) and (III), obtainable by reacting 1 mol of a succinic diester with 2 mol of a mixture of nitriles A-CN and B—CN, where A-CN and B—CN are present in the nitrile mixture in a molar ratio of 90:10 to 30:70 relative to one another, and where A-CN is 2-chlorobenzonitrile and B—CN is 4-X-benzonitrile where X=chlorine, methyl or nitrile.

Abstract: The invention relates to a method for directly producing fine-particle 1,4-diketopyrrolo[3,4-c]pyrrols of formula (1), wherein R1a, R1b, R2a and R2b independently represent hydrogen, halogen, C1-C4 alkyl, C1-C4 alkoxy, cyano or phenyl, said compounds being characterized by a maximum frequency distribution between 20 and 120 nm. According to the method, nitriles are reacted with succinic acid esters or lactames or enamines in an alkali medium to form a pigment salt, and then protolysis of the pigment alkali salt is carried out. Said method is characterized in that an effective quantity of a pigment dispersant of formula (II) is added during the protolysis of the pigment alkali salt. In formula (II), Q is a radical of an organic pigment from the group of perinone, quinacridone, quinacridonquinone, anthanthrone, indanthrone, dioxazine, diketopyrrolopyrrol, indigo, thioindigo, thiazineindigo, isoindoline, isoindolinone, pyranthrone, isoviolanthrone, flavanthrone or anthrapyrimidine pigments.

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.

Abstract: The invention relates to cocrystals of compounds of the formulae (I), (II) and (III), obtainable by reacting 1 mol of a succinic diester with 2 mol of a mixture of nitriles A-CN and B-CN, where A-CN and B-CN are present in the nitrile mixture in a molar ratio of 90:10 to 30:70 relative to one another, and where A-CN is 2-chlorobenzonitrile and B-CN is 4-X-benzonitrile where X=chlorine, methyl or nitrile.

Abstract: The present invention relates to a pigment composition composed of compounds of the formula (I), (II) and (III) with a novel crystal modification, to their preparation and to the use of this novel product as a pigment. For many applications of organic pigments, for example the coloring of metallic lacquers or the use thereof in color filters, a very high transparency is required. To produce color filters, for example, particularly fine pigments are used, in order to substantially rule out the particle scattering which leads to a lowering of the contrast ratio. The commercially available products, however, do not always meet all requirements of the art. More particularly, there was a need for improvement with regard to the transparency and the associated fineness of the pigment crystals, and also the color purity (chroma).

Abstract: The invention relates to a method for directly producing fine-particle 1,4-diketopyrrolo[3,4-c]pyrrols of formula (1), wherein R1a, R1b, R2a and R2b independently represent hydrogen, halogen, C1-C4 alkyl, C1-C4 alkoxy, cyano or phenyl, said compounds being characterized by a maximum frequency distribution between 20 and 120 nm. According to the method, nitriles are reacted with succinic acid esters or lactames or enamines in an alkali medium to form a pigment salt, and then protolysis of the pigment alkali salt is carried out. Said method is characterized in that an effective quantity of a pigment dispersant of formula (II) is added during the protolysis of the pigment alkali salt. In formula (II), Q is a radical of an organic pigment from the group of perinone, quinacridone, quinacridonquinone, anthanthrone, indanthrone, dioxazine, diketopyrrolopyrrol, indigo, thioindigo, thiazineindigo, isoindoline, isoindolinone, pyranthrone, isoviolanthrone, flavanthrone or anthrapyrimidine pigments.

Abstract: The invention relates to a diketopyrrolopyrrole pigment of formula (I) in which R10, R11, R12 and R13 independently of one another denote hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, cyano or phenyl, characterized by a first maximum of the frequency distribution (according to weight fractions) of the crystal sizes at or below 700 nm and at least one further maximum of the frequency distribution (according to weight fractions) of the crystal sizes which is at least 100 nm above the first maximum.

Abstract: The invention relates to a pigment preparation based on C.I. Pigment Red 254 content with an average particle size of between 20 and 100 nm, and to at least one pigment dispersant of formula (II).

Abstract: The invention relates to a diketopyrrolopyrrole pigment of formula (I) in which R10, R11, R12 and R13 independently of one another denote hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, cyano or phenyl, characterized by a first maximum of the frequency distribution (according to weight fractions) of the crystal sizes at or below 700 nm and at least one further maximum of the frequency distribution (according to weight fractions) of the crystal sizes which is at least 100 nm above the first maximum.

Abstract: The present invention relates to a method for colouring partially crystalline plastics in the material. The invention is characterized in that (i) a partially crystalline plastic from the group of homopolymers, terpolymers or ethylene copolymers, propylene, butylenes, styrene, and/or divinyl-benzene, polyesters, polyamides and the thermoplastic ionomers; (ii) a pigment from the group of dicetopyrrolopyrrole-, quinacridone, disazocondensation, isoindolinions and isoindoline pigments; and (iii) 0.001 to 0.25 weight part, in relation to a weight part pigment of an additive of formula (I), are formed, wherein Q is a radical of a dicetopyrrolopyrrole compound of formula (1a), wherein R14, R15, R16 and R17 independently represent hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, or cyano; s is a number between 0.1-4.0; and R is a radical of formula —CONZ1Z2, —NZ1Z2 or —COOZ3.

Abstract: A process for warpage-free pigmentation of a plastic pigmented by a phthalocyanine pigment which was heated to not less than 80° C. as a suspension in a organic solvent in the presence of a carboxylic acid containing 2, 3 or 4 carboxyl groups or a salt of such a carboxylic acid.

Abstract: A method for treating phthalocyanine pigments, said method being characterized in that a) a phthalocyanine pigment is suspended in a liquid medium containing aqueous hydrochloric acid and an organic solvent containg carbonyl and/or ether groups, b) the suspension is maintained for between 5 to 300 min at a temperature of from 0° to 150° C. and c) the suspension is then filtered and washed.

Abstract: The invention relates to a method for production of an aqueous dispersion of polymer-encapsulated pigments characterized in that (a) an aqueous pigment dispersion, containing at least one organic pigment (P) at least one surfactant (T), and water is prepared, (b) a monomer miniemulsion stabilized by a hydrophobic organic compound with a water solubility at 20° C. of not more than 5×10?5 g/l, is prepared from a polymerizable monomer (M) and at least one surfactant (T), in water, (c) a monomer pigment emulsion is prepared, whereby the aqueous pigment dispersion from (a) and the monomer miniemulsion from (b) are mixed and homogenized, and (d) the pigment-containing monomer miniemulsion from (c) is polymerized in the presence of a polymerization initiator and/or by heat, whereupon an encapsulation of the pigment with the polymer thus formed occurs.

Abstract: A pigment preparation comprising a) at least one diketopyrrolopyrrole pigment of the formula (V) as a base pigment and b) at least one pigment dispersing agent based on sulphonated diketopyrrolopyrrole derivatives and the use thereof for the undistorted coloration of plastics

Abstract: The invention relates to a process for aftertreating organic pigments which comprises heating the unground or ground organic crude pigment in water and/or organic solvents by means of microwave irradiation, under pressure if desired, so that the mass temperature of the mixture reaches 30 to 250° C.

Abstract: The invention relates to a method for pigmenting semi-crystalline plastics with phthalocyanine pigments in a non-warping manner. Said method is characterised by the use of a phthalocyanine pigment that has been heated as a suspension in an organic solvent in the presence of a dicarboxylic acid or a dixarboxylic acid salt to a temperature of at least 80° C. The invention also relates to a phthalocyanine pigment produced in this way.

Abstract: The invention relates to a process for aftertreating organic pigments which comprises heating the unground or ground organic crude pigment in water and/or organic solvents by means of microwave irradiation, under pressure if desired, so that the mass temperature of the mixture reaches 30 to 250° C.