Basf Aktiengesellschaft

Daimler Chrysler Ag

Clariant Corporation

Basf Se Corporation

Daimler-benz Ag

Clariant Produkte (deutschland) Gmbh

Wacker-chemie Gmbh

Andreas Stohr

Michael Gailberger

Fritz Dannenhauer

Katja Strelzyk

Peter Strohriegl

Hans Joachim Metz

Karl Holdik

Petra Grundig

Anne Barth

Axel Schoenfeld

Hansulrich Reisacher

Ingo Klopp

Juan Antonio Gonzalez Gomez

Johannes Loebel

Erik Grosse

Peter Erk

Jin Mizuguchi

Arno Boehm

Walter Kurtz

Ruediger Baur

Heinrich Kowarsch

Uwe Mauthe

Ulrike Rohr

Klaus Brychcy

Benno Sens

Heinfred Ohleier

Christoph Mueller-Rees

Hans-Joachim Metz

Josef Hetzenegger

Thomas Hundsdorf

Peter Boettcher

Arno Böhm

Manfred Schroeck

Hans-Joachim Uschmann

Kathrin Kuerschner

Juliane KRÜSEMANN

Johannes LÖBEL

Manfred Siegler

Peter Böttcher

The invention provides a process for preparing N,N'-di(3&#x2032;,5&#x2032;-dimethylphenyl)perylene bis(dicarboximide), and other pigments having modified properties, by reaction of perylene-3,4,9,10-tetracarboxylic dianhydride with 3,5-dimethylaniline, or a mixture of 3,5-dimethyl aniline and at least one other primary amine, in the presence of a secondary amine or tertiary amine as catalyst, wherein the reaction occurs in an aqueous reaction medium and in the presence of added seed crystals of N,N&#x2032;-di(3&#x2032;,5&#x2032;-dimethylphenyl) perylenebis(dicarboximide), such that the aqueous medium is present at the beginning of the reaction.

Preparation of Pigment Red 149

A process for preparing perylene pigments of the general formula (Ia) or (Ib) or mixtures thereof, by reacting perylenetetracarboxylic acids or functional derivatives thereof with aromatic diamines, where R, Rmay be the same or different and may each independently be phenylene, naphthylene or pyridylene, where R, Rmay each be mono- or polysubstituted by C-C-alkyl, C-C-alkenyl, C-C-alkoxy, hydroxyl and/or halogen, X, X, X, X, X, X, X, Xmay be the same or different and may each independently be hydrogen or halogen, wherein the reaction is performed in the presence of a secondary or tertiary amine in an aqueous reaction medium.

Aqueous synthesis of perylene pigments

Isoindoline pigments of the general formula I in which the variables are defined as follows:

Isoindoline pigments

The invention relates to the use of compounds of general formula (I) as crystallization modifiers for organic pigments, in which formula the variables have the following designation: A represents &#x2550;N&#x2014; or &#x2550;CH&#x2014;; X represents methyl or a radical of formula (IIa) if A represents &#x2550;N&#x2014;, and a radical R if A represents &#x2550;CH&#x2014;; Y represents a radical R or a radical of formula (IIb), either X representing a radical of formula (IIa) or Y representing a radical of formula (IIb); and the rings Band Bcan be independently substituted, in addition, by at least one of the radicals R which are the same or different and do not represent hydrogen.   

Use of quinaldine and naphthaline derivatives as crystallisation modifiers

Black perylene pigments which comprise one of the isomers of the formula Ia or Ib in which

Black perylene pigments

Dispersible pigment granules are produced by mixing an aqueous suspension of an organic pigment with an aqueous emulsion of a wax-like additive. The aqueous emulsion is then allowed to coagulate and the resulting aqueous dispersion is spray dried.

Method for the production of pigment granules

Solid pigment preparations comprising as essential constituents

Solid pigment preparations containing anionic and non-ionic surface-active additives

A method for distortion-free pigmentation of partly-crystalline plastics, characterized in that a phthalocyanine pigment is used which has been heated to a temperature of at least 80&#xb0; C. as a suspension in an acid-free organic medium in the presence of a base.

Method for distortion-free pigmentation of partly-crystalline plastics with phthalocyanine pigments

Solid pigment preparations containing the following ingredients as substantial components: (A) 60&#x2013;85 wt. % of at least one organic pigment, (B) 0.1&#x2013;15 wt. % of at least one pigment derivative of general formula I wherein the variables have the following meanings: P is the radical of the parent substance of an organic pigment; T, Tindependently represent a chemical bond, &#x2014;CONR&#x2014; or &#x2014;SONR&#x2014;; B, Bindependently represent a chemical bond, C1&#x2013;C8-alkylene or phenylene; X, Y independently represent similar or different groups &#x2014;SO&#x2014; Kaor &#x2014;COO&#x2014; Ka; m, n represent a rational number from 0 to 3, whereby 1=m+n=4; KaH, Li, Na, K, NRRRRor a mixture of said cations; Rrepresents hydrogen; C&#x2013;C-alkyl; phenyl or naphthyl which can be respectively substituted by C&#x2013;C-alkyl; R, R, R, Rindependently represent hydrogen; C&#x2013;C-alkyl; C&#x2013;C-alkenyl; C&#x2013;C-cycloalkyl which can be substituted by C&#x2013;C-alkyl; phenyl or naphthyl which can be respectively substituted by C&#x2013;C-alkyl or C&#x2013;C-alkenyl; a radical of formula &#x2014;[CHR&#x2014;CHR&#x2014;O]x&#x2014;R, wherein the repeating units &#x2014;[CHR&#x2014;CHR&#x2014;O] for x &#x3e;1 can vary; R, R, Rindependently represent hydrogen or C&#x2013;C-alkyl; x is a whole number =1, and (C) 14.9 39.9 wt. % of at least one surface active additive from the group of non-ionic polyethers containing no primary amino groups, the acidic phosphoric acid esters, phosphonic acid esters, sulphuric acid esters and/or sulfonic acid esters thereof, the salts thereof and the condensation produces thereof with formaldehyde. 

Solid pigment preparations containing pigment derivatives and surface-active additives

The present invention relates to the use of wax-coated pigment granules as colorants in electrophotographic toners and developers, powder coating materials, inkjet inks, electret fibers, and color filters, wherein the coated pigment granules have a particle size of between 0.05 and 5 mm and a wax content of from 1 to 50% by weight, based on the overall weight of the coated pigment granules.

Use of coated pigment granules in electrophotographic toners and developers, powder coatings and inkjet inks

Compounds and their application as well as a method of producing liquid crystalline polymers therefrom

A compound for use as a nematic phase in cholesteric liquid polymers of the general formula C&mdash;A,, and a production process.

Compounds, process for their manufacture, as well as a process for manufacturing liquid-crystalline polymers using these compounds

The invention relates to a process for generating a marking on an effect coating or molding compound comprising cholesteric liquid-crystalline main-chain or side-group polymers or comprising a combination of main-chain and side-group polymers, which comprises inducing a color change at the irradiated sites of the effect coating or molding compound by laser irradiation.

Laser marking of effect coatings

The invention relates to platelet-shaped interference pigments for effect paints for painting objects of daily use, especially vehicle bodies, with the interference pigments including liquid crystal polymers (LCP) with main and/or side groups&mdash;mesogens&mdash;which are arranged at least approximately chirally-nematically or the like. In order to be able to paint different colored backgrounds in a covering fashion using the transparent interference pigments, the interference pigments are built up in several layers and also have at least one and preferably two interfering layer(s) of liquid crystal polymers and even of a single, preferably centrally located, light-absorbent layer, with the light-absorbent layer absorbing at least a portion of the visible light spectrum. Advantageously the light-absorbent layer can absorb light in the entire visible light spectrum, in other words appear black. It is also possible for it to be made light-absorbent within those partial areas of the visible light spectrum that lie outside one of the colors of the interference pigments. A method is also disclosed for manufacturing the multilayer interference pigments.

Method for producing platelet-shaped interference pigments

Growing community of inventors

Freinsheim, Germany

Andreas Stohr