Ciba-Geigy Corporation

Other

Hans Altermatt

Alois Puntener

Peter Moser

Arnold Wick

Ernst Tempel

There is disclosed a process for dyeing leather by the exhaust process, which comprises treating leather with an aqueous liquor which contains a formulation comprising a black anionic dye and a sulfonated carbon black. The leather dyeings obtained by this process have good allround fastness properties.

Process for dyeing leather with an aqueous bath containing sulfonated

The invention relates to vattable 2-aryl-4,6-diaminopyrimidines of formula ##STR1## wherein A.sub.1 and A.sub.2 are identical or different vattable radicals, and

Vattable 2-aryl-4,6-diaminopyrimidines

Novel anthrimidecarbazole compound of the formula ##STR1## as an olive-coloring vat dye exhibiting an increased ability to reflect infra-red light.

Anthrimidecarbazole compound having thenoylamino groups

Process for the dyeing of high-molecular organic material in the melt, in which process there is used as coloring substance an anthraquinone compound of the formula ##STR1## wherein R represents straight-chain or branched-chain alkyl having 1 to 17 C atoms, X.sub.1 and X.sub.2 represent hydrogen or benzoylamino, or X.sub.1 represents hydrogen and X.sub.2 represents benzoylamino.

Process for dyeing high-molecular organic material in the melt

Vat dyestuffs of the formula ##EQU1## wherein R represents alkyl with 1 to 4 carbon atoms, R.sub.1 and R.sub.2 represent hydrogen or alkyl with 1 to 4 carbon atoms and each of A.sub.1 and A.sub.2 represents a vattable radical with 3 to 7 condensed rings are characterized by improved resistance to alkali and are suitable for dyeing and printing the most diverse materials, in particular fibers made from natural or regenerated cellulose.

Triazinyl dyes

Vat dyestuffs of the formula ##EQU1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a low molecular alkyl radical and A.sub.1 and A.sub.2 represent a different or similar vattable radical with 3 to 6 condensed rings, are suitable for dyeing and printing the most varied materials, in particular for dyeing and printing fibres made from natural or regenerated cellulose in the presence of a reducing agent.

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Reinach, Switzerland

Hans Altermatt