Ciba Specialty Chemicals Corporation

Basf Se Corporation

Freshpoint Holdings S.a.

Leonhard Feiler

Olof Wallquist

Zhimin Hao

Gerardus De Keyzer

Thomas Ruch

Mathias Düggeli

Taher Yousaf

Roman Lenz

Thomas Raimann

Max Hügin

Peter Nesvadba

Christian Cremer

Marc Maurer

Thomas Eichenberger

André Fuchs

Didier Bauer

Martin Müller

Wolfgang Schlenker

Bruno Inderbitzin

Elena Tenetov

Julien Assous

Functionalized nanoparticles, which are obtainable by combining in a first step a functionalized dyestuff, a silicon-based spacer and a catalyst, and in a second step reacting the product obtained in the first step with a co-reactive organic silicon, aluminum, zirconium or titanium compound. Optionally, the thus obtained functionalized nanoparticles can be combined or encapsulated with a polymer. The functionalized nanoparticles are useful as colorants and fluorescents in plastics, paints, inks, electronic materials, cosmetic articles, and the like.

Functionalized core-shell nanoparticles

The present invention relates to a photochromic ink, the process for its preparation which is based on a spiropyran powder obtainable by melting, cooling and crushing, and to a new form of a spiropyran obtainable thereby. Said process to prepare a photochromic ink comprises the steps of a) heating and melting the spiropyran at a temperature below 250 C, b) cooling the melt to obtain a solidified spiropyran, c) crushing the solidified spiropyran to obtain a powder, d) optionally adding the powder to a binder providing the basis for the photochromic ink.

Preparation of a photochromic ink

The present invention relates to a process for the preparation of a mixture comprising at least two structurally different diketopyrrolopyrrole pigments of formula whereinAand Aare each independently of the other an aromatic or heteroaromatic radical, by reacting a succinic acid ester with at least one unsubstituted or substituted aromatic or heteroaromatic nitrile, which process comprises carrying out the reaction in the presence of at least one compound of formula whereinA is an aromatic or heteroaromatic radical, Ris hydrogen, halogen, methyl, methoxy, &#x2014;CFor &#x2014;CN, Ris a linear or, from Cupwards, optionally branched C-Calkyl, C-Caryl or C-Caralkyl radical, X is &#x2014;S&#x2014;, &#x2014;O&#x2014;, &#x2014;CRR'&#x2014;, &#x2014;COO&#x2014;, &#x2014;CONR&#x2014;, &#x2014;SO&#x2014;, SO&#x2014;, &#x2014;SONR&#x2014; or &#x2014;NR&#x2014; and Rand R&#x2032; are each independently of the other hydrogen or a linear or, from Cupwards, optionally branched C-Calkyl, C-Caryl or C-Caralkyl radical,to the use of such a mixture in the coloring of organic material and in cosmetics, and also to novel diketopyrrolopyrrole pigment mixtures.

Heat-stable diketopyrrolopyrrole pigment mixtures

The present invention relates to a process for the preparation of a mixture comprising at least two structurally different diketopyrrolopyrrole pigments of formula (1) wherein Aand Aare each independently of the other an aromatic or heteroaromatic radical, by reacting a succinic acid ester with at least one unsubstituted or substituted aromatic or heteroaromatic nitrile, which process comprises carrying out the reaction in the presence of at least one compound of formula (2) wherein A is an aromatic or heteroaromatic radical, Ris hydrogen, halogen, methyl, methoxy, &#x2014;CFor &#x2014;CN, Ris a linear or, from Cupwards, optionally branched C-C3alkyl, C-Caryl or C-C2aralkyl radical, X is &#x2014;S&#x2014;, &#x2014;O&#x2014;, &#x2014;CRR'&#x2014;, &#x2014;COO&#x2014;, &#x2014;CONR&#x2014;, &#x2014;SO&#x2014;, SO&#x2014;, &#x2014;SONR&#x2014; or &#x2014;NR&#x2014; and Rand R&#x2032; are each independently of the other hydrogen or a linear or, from Cupwards, optionally branched C-Calkyl, C-Caryl or C-Caralkyl radical, to the use of such a mixture in the coloring of organic material and in cosmetics, and also to novel diketopyrrolopyrrole pigment mixtures 

The present invention relates to azo dyes of formula (1) which are soluble in organic solvents, wherein Ris &#x2014;CN, &#x2014;COOR, &#x2014;CONRRor a heterocyclic ring, Ris unsubstituted or substituted alkyl, unsubstituted or substituted aryl, &#x2014;CF, &#x2014;COOR, &#x2014;CONRRor &#x2014;COR, Ris hydrogen, &#x2014;SOM, alkyl, alkoxy, alkylcarbonyl, &#x2014;NOor halogen, Ris substituted aryl, substituted heteroaryl or an aryl-N&#x2550;N-aryl radical, wherein one or both of the aryl radicals in aryl-N&#x2550;N-aryl is/are unsubstituted or substituted, or a radical heteroaryl-N&#x2550;N-heteroaryl, wherein one or both of the heteroaryl radicals in heteroaryl-N&#x2550;N-heteroaryl is/are unsubstituted or substituted, Ris hydrogen, alkyl or unsubstituted or substituted aryl, Ris hydrogen, alkyl or unsubstituted or substituted aryl, Ris hydrogen, alkyl or unsubstituted or substituted aryl, Mis a cation, n is a number 1, 2 or 3 and m is a number 1, 2 or 3, to a process for the preparation thereof and to the use thereof in the production of colored plastics or polymeric color particles, and as printing inks, printing dyes, coating compositions and wood stains 

Benzimidazole-pyridone-based azo dyes

Benzofuran-2-ones, compositions comprising benzofuranones, processes for preparing them, and their use as colorants for high or low molecular mass organic material.

Benzofuran-2-one

Compounds for mass colouration of high temperature polymers

Compounds for mass coloration of high temperature polymers

Growing community of inventors

Binzen, Germany

Leonhard Feiler