Basf Aktiengesellschaft

Ortwin Schaffer

Karl Stork

Rolf Streicher

Heinrich Hartmann

Walter Denzinger

Knut Oppenlaender

Wolfgang Reuther

Rolf Fikentscher

Norbert Greif

Dietrich Lach

Herbert Bay

Manfred Patsch

Gunther Lamm

Georg Zeidler

Juergen Weiser

Klaus Ebel

Helmut Reichelt

Alfred Oftring

Guenter Hansen

Maximilian Angel

Heinz Eilingsfeld

Joachim Pakusch

Guenther Seybold

Johannes P Dix

Thomas Schwerzel

Georg Henning

Kurt Schneider

Gernot Franzmann

Klaus Lorenz

Heike Kilburg

Horst Belde

Hermann Graf

Paul Guenthert

Brigitte Wegner

Hermann Birkhofer

Hermann Loffler

Hartmut Lardon

Dietmar Augart

Heinz Krueger

Adolf Stuebinger

Helmut Beichelt

Jurgen Dornhagen

Reactive azo dyes with a coupler of the aminonaphthalene series

There are described benzophenoneazo dyes of the formula ##STR1## where the ring A can be benzofused and a benzofused ring A can be overbridges, m is 1 or 2, K is the radical of a coupling component, Y is hydrogen or arylazo, one of the two radicals X.sup.1 and X.sup.2 is hydrogen and the other is hydroxysulfonyl, R.sup.1, R.sup.2 and R.sup.3 are independently of the others hydrogen, halogen, C.sub.1 -C.sub.12 -alkyl, cyclohexyl, phenyl, 2-hydroxy-ethylsulfonyl or C.sub.1 -C.sub.4 -alkoxy or, when m is 1 and Y is hydrogen, one of these substituents can also be the radical of the formula ##STR2## where L.sup.1 is a chemical bond or a bridge member, and X.sup.1, X.sup.2, R.sup.4, K and the ring A are each as defined above, and R.sup.4 is hydrogen, halogen or C.sub.1 -C.sub.4 -alkoxy, with the proviso that there is at least one water-solublizing group in the molecule, novel pyridone compounds, a process for preparing disulfonated pyridone compounds, and the use of the novel dyes for dyeing natural or synthetic substrates.

Amino benzophenone dye

Pyridone compounds and the preparation of disulfonated pyridone compounds

Self-tanning, pretanning and assist tanning of pelts and skin pelts and

Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases and formaldehyde, obtainable by

Condensation polymers of sulfonated phenols, urea, other organic

Fluent dye preparations useful for dyeing leather or wool contain

Fluent polyazo dye preparations and method of dying leather or wool

Use of copolymers based on long-chain alkyl vinyl ethers and

Copolymers which are obtainable by free radical copolymerization of (a) C.sub.8 --C.sub.40 -monoolefins with (b) ethylenically unsaturated C.sub.4 -C.sub.8 -dicarboxylic anhydrides by mass polymerization at from 80.degree. to 300.degree. C. to give copolymers having molecular weights of from 500 to 20,000 g/mol, subsequent solvolysis of the anhydride groups of the copolymers and partial or complete neutralization of the carboxyl groups formed during the solvolysis, in an aqueous medium by means of a base, and which are present in the form of aqueous dispersions or solutions, are used as agents for rendering leathers and skins water-repellent.

Copolymers based on long-chain olefins and ethylenically unsaturated

Dyed leather is aftertreated with quaternized condensation products of

Quaternized condensation products for aftertreating dyed leather

Products of the condensation of phenolmonosulfonic acids, dihydroxydiphenyl sulfones, urea and formaldehyde can be obtained by

Products of the condensation of phenolmonosulfonic acids,

Copolymers based on long-chain unsaturated esters and ethylenically

Polyazo dyes useful for dyeing leather in the free form or as copper, chromium, iron, cobalt or nickel complexes have the formula ##STR1## where m is 0, 1 or 2, n is 0 or 1, p is from 1 to 2, q is from 0 to 1, and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y and the ring A are each as defined, and may be prepared from aniline derivatives of the formula ##STR2## where m is 0, 1, or 2, n is 0 or 1, and X, R.sup.1, R.sub.2 and R.sup.3 are each as defined.

Polyazo dyes with diazo components of the aminophenol and the amino

Leather is dyed with pigments in an aqueous liquor at from 20.degree. to 60.degree. C. in the presence of an alkoxylated amine of 20 or more carbon atoms.

Dyeing of leather with pigments

A condensate of bis-(4-hydroxyphenyl) sulfone, an aldehyde, a dialdehyde and/or glyoxylic acid and aminoacetic acid or an N-substituted aminoacetic acid is prepared and used as a tanning assistant, in a process for tanning leather in combination with, in particular, aluminum tanning agents.

Condensates of bis-(4-hydroxyphenyl) sulfone as tanning assistants,

A tanning assistant useful in particular for tanning in combination with aluminum tanning agents is obtained by condensing melamine with glyoxal and/or glyoxylic acid and optionally with an aromatic compound which has a phenolic hydroxyl group or optionally with a condensable nitrogen compound.

Tanning assistant

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Ludwigshafen, Germany

Ortwin Schaffer