Ciba-Geigy Corporation

Ciba Specialty Chemicals Corporation

Josef Koller

Urs Lehmann

Alois Puntener

Gerhard Back

Wilfried Herter

Fabio Beffa

Stefan Koller

Peter Scheibli

Peter Moser

Klaus Hannemann

Pierre Galafassi

Ulrich Horn

Manfred Motter

Disclosed are dyes having the formula ##STR1## in which R.sub.1 is C.sub.1 -C.sub.4 alkoxy or chlorine,

Benzothiazolium containing azo dyes useful for dyeing polyacrylonitrile

A process is described for fibre- and surface-level dyeing of wool and blends thereof with other fibers using a compound of formula (1) ##STR1## in which n is 0 or 1, and if n is 1, A is a radical of the formula ##STR2## and B is an alkylene or alkenylene group or a direct bond, or if n is zero, A is a compound of the formula ##STR3## Fibre- and surface-level dyeings, in particular in light to medium color shades are obtained by the dyeing process according to the invention. The dyeing aid according to this invention can be used to substitute formaldehyde containing wool dyeing aids.

Process for dyeing wool and blends thereof with other fibres using

Process to dye polyacrylonitrile in blue shades with cationic dye compounds: substituted benzothiazolium azo N-alkyl-N-hydroxyalkyl alkyl-aniline salts.

Process for the dyeing of polyacrylonitrile materials with cationic

The fibre-reactive formazan dyes of the formula ##STR1## in which R is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, cyano or nitro, X is fluorine or chlorine, Y is .beta.-chloroethyl or vinyl and n is the number 0, 1 or 2 produce dyeings which have good fastness properties on nitrogen-containing or hydroxyl-containing fibre materials.

Fibre-reactive formazan dyes containing .beta.-chloroethylsulfonyl or

The fibre-reactive formazan dyes of the formula ##STR1## in which R is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, cyano or nitro, X is fluorine or chlorine, and n is the number 0, 1 or 2 produce dyeings which have good fastness properties on nitrogen-containing or hydroxyl-containing fibre materials.

Fibre-reactive formazane dyes containing .beta.-sulfatoethylsulfonyl

The fibre-reactive formazan dyes of the formula ##STR1## where X is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, cyano or nitro, Y is .beta.-haloethyl or vinyl, m is 1, 2 or 3, n is 3 or 4, p is 0, 1 or 2 and q is 0 or 1, produce dyeings having good fastness properties on nitrogen-containing or hydroxyl-containing fibre materials.

Fibre-reactive formazan dyes containing .beta.-halogenethyl or

For improving the light-fastness of leather dyed with anionic dyes, the leather is treated, before, during or after dyeing, with a compound of copper.

Process for improving the light-fastness of leather dyeings

A mixture comprising a yellow dye and a red dye each of formula I and a grey dye of formula II is employed in accordance with claim 1 for the trichromatic dyeing of leather.

Process for the trichromatic dyeing of leather

The dyes of the formula I given in claim 1 are suitable for dyeing furs and especially leather. They are preferably used in admixture with one or more suitable yellow, blue or red dyes for dyeing leather in dark shades.

Use of 1:2 chrome complex dyes for dyeing leather and furs

Described is a process for the level dyeing of polyacrylonitrile materials of slow, normal and rapid absorptive capacity with an aqueous dye liquor, which process comprises using a liquor containing at least one migrating cationic dye as well as, if required, further additives; and adding to the liquor, before, during or after dyeing, at least one organic cationic migration auxiliary. This process renders possible by the use of organic migration auxiliaries the obtainment of level single-shade and, in particular, combination-shade dyeings at normal dyeing temperatures. Particularly suitable migrating cationic dyestuffs are those having a more or less delocalized positive charge, the cation weight of which dyestuffs is smaller than 310, the parachor smaller than 750 and the log P (relative lipophil property) smaller than 3.6. Particularly suitable organic migration auxiliaries are those of which the cation weight is smaller than 250, the parachor smaller than 700 and the log P smaller than 6.4.

Process for the level dyeing of polyacrylonitrile materials of slow,

A process for dyeing polyacrylonitrile materials in clear, neutral blue shades, which comprises the use of a mixture of an oxazine dye of the formula ##STR1## and a naphtholactam dye of the formula ##STR2## in the ratio of 1:3 to 3:1, in which formulae R.sub.1 and R.sub.2 represent low molecular alkyl radicals, R.sub.3 represents a low molecular alkyl radical or an aryl radical, R.sub.4 represents hydrogen or a low molecular alkyl radical, each of R.sub.5 and R.sub.6 represents a low molecular alkyl radical, Y represents a halogen atom and X.sup..crclbar. represents an anion and a dyestuff preparation which contains an oxazine dye of the formula (1) and a naphtholactam dye of the formula (2) in the ratio 1:3 to 3:1.

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Reinach, Switzerland

Josef Koller