Ciba Specialty Chemicals Corporation

Taher Yousaf

Gerardus De Keyzer

Jean-Marie Adam

Olof Wallquist

Roman Lenz

Beate Fröhling

Mathias Düggeli

Leonhard Feiler

Victor Paul Eliu

Chandrasekhar Dayal Mudaliar

Vadiraj Subbanna Ekkundi

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 invention relates to novel liquid crystal displays comprising a broad backlight emission around 530 nm and a green color filter containing a phthalocyanine colorant, most adequately tetrahydroxy- or tetraalkoxy-substituted but lacking solubilizing groups.

Liquid crystal display and colour filter with improved transparency for green light

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 high-molecular-weight polymeric material comprising at least one diketopyrrolopyrrole pigment of formula (1) wherein R, is hydrogen, chlorine, methyl, methoxy, CFor CN, Ris hydrogen, chlorine, methyl, methoxy, CFor CN, A is hydrogen, chlorine, methyl, mehtoxy, CF, CN, unsubstituted or substituted phenyl or a radical of formula (2), (2a) or (2b), wherein Ris hydrogen, chlorine, methyl, methoxy, nitro, CFor CN and Ris hydrogen, chlorine, methyl, methoxy, nitro, CFor CN, or Rand Rtogether with the phenyl ring to which they are bonded form an aryl or a heteroaryl and Ais a radical of formula (2), (2a) or (2b), to the preparation of that material and to the use thereof in colour filters, and to novel diketopyrrolopyrrole pigments. 

High-molecular-weight polymeric material comprising diketopyrrolopyrrole pigments

A method of colouring porous material, especially human hair, is described, which method comprises applying to the material being coloured, in any desired order successively, or simultaneously, a) at least one capped diazonium compound of Formula (1) and/or at least one compound of Formula (2) and/or at least one compound of Formula (3) wherein Q is an unsubstituted or substituted aromatic or heterocyclic residue, R is the radical of an unsubstituted or substituted, water-soluble aliphatic or aromatic amine, and T is an unsubstituted or substituted, water-soluble aliphatic or aromatic residue, wherein at least one of the groups must contain a radical imparting water solubility, and a) at least one water-soluble coupling component under conditions such that, initially, coupling does not take place, and then causing the capped diazonium compound present on the material to react with the coupling component 

Method of coloring porous material

The present invention relates to a method of coloring keratin-containing fibres, especially human hair, in which method a compound of formula (I), wherein R is hydroxy or NHR, Rbeing hydrogen or C&#x2013;Calkyl, and B is an aromatic or heterocyclic ring, is diazotised, and the resulting diazonium salt is applied at a pH of from 2 to 5 to the material being colored and then, by means of increasing the pH to from 7 to 12, is fixed on the material in the form of an oligomeric or polymeric colorant 

Method of coloring keratin-containing fibres using diazonium salts

A method of coloring porous material, especially human hair, is described, which method comprises applying to the material being colored, in any desired order successively, or simultaneously, a) a capped diazonium compound and b) a water-soluble coupling component under conditions such that, initially, coupling does not take place, and then causing the capped diazonium compound present on the material to react with the coupling component.

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Basel, Switzerland

Taher Yousaf