Clariant Finance (bvi) Limited

Clariant Corporation

Clariant Produkte (deutschland) Gmbh

Clariant Produkte Gmbh

Matthias Ganschow

Carsten Plueg

Hans Joachim Metz

Joachim Weber

Katharina Landfester

Ulrike Rohr

Karl-Heinz Schweikart

Thomas Hundsdorf

Tanja Reipen

Lars Schneider

Jens Reichwagen

Uwe Benner

Sascha Steinhauer

Christiane Strohm-Zimmermann

Carsten Plüg

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&#xb0; C. of not more than 5&#xd7;10g/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.

Method for production of polymer-encapsulated pigments

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).

Diketopyrrolopyrrole cocrystals with high transparency

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 dranging 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.

Diketopyrrolopyrrole pigment composition for use in color filters

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&#x2014;CN, where A-CN and B&#x2014;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&#x2014;CN is 4-X-benzonitrile where X=chlorine, methyl or nitrile.

Diketopyrrolopyrrole cocrystals

The invention relates to a method for directly producing fine-particle 1,4-diketopyrrolo[3,4-c]pyrrols of formula (1), wherein R, R, Rand Rindependently represent hydrogen, halogen, C-Calkyl, C-Calkoxy, 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.

Method for directly producing fine-particle diketopyrrolopyrrol pigments

The invention relates to a diketopyrrolopyrrole pigment of formula (I) in which R, R, Rand Rindependently of one another denote hydrogen, halogen, C-C-alkyl, C-C-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.

Diketopyrrolopyrrole pigments having heightened fastnesses and processes for preparing them

A process for warpage-free pigmentation of a plastic pigmented by a phthalocyanine pigment which was heated to not less than 80&#xb0; 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.

Method for pigmenting semi-crystalline plastics with phthalocyanine pigments in a non-warping manner

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 

Pigment preparations based on diketopyrrolopyrrole pigments for the undistorted pigmentation of partially crystalline plastics

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&#xb0; C.

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Wiesbaden, Germany

Matthias Ganschow