Basf Aktiengesellschaft

Erwin Hahn

Helmut Reichelt

Guenter Hansen

Wolfgang Reuther

Udo Mayer

Karl-Heinz Etzbach

Alfred Oftring

Rolf Fikentscher

Dietrich Lach

Gerhard Wagenblast

Manfred Patsch

Ernst Schefczik

Udo Bergmann

Reinhold Krallmann

Helmut Degen

Juergen Weiser

Heinrich Kowarsch

Peter Neumann

Alexander Aumueller

Werner Ostertag

Alexander Kud

Dieter Horn

Ulf Baus

Helmut Hoch

Georg Henning

Rolf Streicher

Heinrich Hiller

Ewald Daubach

Volker Radtke

Horst Colberg

Peter Hauser

Bernhard Dung

Herbert Uhrig

Walter Denzinger

Herbert Naarmann

Wolfgang Hoelderich

Helmut Hagen

Gunther Lamm

Ruediger Sens

Wolfgang Trieselt

Johannes Perner

Bernhard Albert

Guenther Seybold

Hans-Juergen Degen

Matthias Wiesenfeldt

Wolfgang Lotsch

Friedrich-Wilhelm Raulfs

Chung-Ji Tschang

Clemens Grund

Kurt Schneider

Manfred Ruske

Joachim Jesse

Reinhard Kemper

Bernd Burkhart

Manfred Mielke

Heike Kilburg

Sigberg Pfohl

Ulrich Riebeling

Sabine Gruettner-Merten

Paul Guenthert

Rainer Strickler

Andreas Hohmann

Henning Wienand

Gunter-Rudolf Schroeder

Dieter Wegerle

Ulrike Schloesser

Bernd Ziegler

Klaus Horchler Von Locquenghien

Peter Wittmer

Richard Hoene

Walter Breitschaft

Bernd Hupfeld

Arnold De Clercq

Peter Ksoll

Heidi Hengelsberg

Joerg Adel

Lothar Wuertele

Christoph Bomba

Rainer Betz

Guido Kuth

Heinrich J Eilingsfeld

Mathias Wiesenfeldt

Andreas Guldner

Andreas Geisberger

Claudia Kraeh

Georg Mermigidis

Bernhard Magerkurth

Sabine Greuttner

A process for the production of metal coated melamine-formaldehyde fibers is disclosed. Prior to coating, the fibers are first activated. Activation consists of applying a metal layer to the fibers by reducing a water soluble cobalt, copper or nickel salt with either: 1) a less noble metal or metal salt or 2) a hydride compound and a complexing agent. The desired metal coating is then applied to the pretreated fibers by reducing a water soluble salt of the metal with a reducing agent in the presence of a complexing agent.

Process of making metal-coated melamine/formaldehyde resin fibers

Fluorescent pigments have a mean particle size of from 8 to 16 lm and contain apolar polymer matrices based on polymethyl methacrylate, polystyrene, polybutadiene-modified polystyrene, polycarbonate, polyvinyl chloride or polyamide and one or more apolar fluorescent dyes of the coumarin or perylene series.

Fluorescent pigments

A process for preparing 1-amino-4-hydroxyanthraquinone by treating 1,4-dihydroxyanthraquinone with ammonia in an aqueous medium comprises treating with ammonia in the presence of a base and of a catalytic amount of a reducing agent at from 60.degree. to 150.degree. C. and at from 1 to 30 bar.

Preparation of 1-amino-4-hydroxyanthraquinone

Production of shining shaped articles coated with zinc or a zinc alloy

There are described rhodamine derivatives of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, or R.sup.2 is paired off with R.sup.5 or R.sup.4 with R.sup.6 to form 1,3-propylene, which can be substituted,

Rhodamine derivatives

A process for chemically degrading cured amino resins comprises reacting cured amino resins, which may contain fillers, with a primary and/or secondary amine at from 40.degree. to 250.degree. C.

Chemical degradation of cured amino resins

Cured aminoplast resins are recycled by a process in which said resins, which may contain fillers, are treated with an aqueous sulfite, hydrogen sulfite or disulfite solution and the resulting low molecular weight degradation products are used in chemical processes. The resulting low molecular weight degradation products of cured aminoplast resins are used for coating moldings, for tanning leather and skins and for the production of moldings which contain cured aminoplast resins or consist thereof.

Recycling of cured aminoplast resins

A process for preparing a compound of the formula I ##STR1## where R.sup.1 to R.sup.4 are each, independently of one another, hydrogen, alkyl, alkoxy, hydroxyl or halogen, comprises reacting a compound of the formula II ##STR2## with a compound of the formula III ##STR3## in the presence of sulfur or a sulfur donor at elevated temperature. The compounds prepared according to the invention are suitable, for example, as diazo components.

Preparation of 2-(4-aminophenyl)benzothiazole compounds

N-Hydroxyazoles of the general formula I ##STR1## where A is ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, are prepared by a process in which an azole of the general formula II ##STR3## where A, R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, is reacted with hydrogen peroxide or an alkyl peroxide in the presence of a zeolite catalyst at from -20.degree. to 150.degree. C. and from 0.1 to 150 bar.

Preparation of N-hydroxyazoles

Azo dyes useful for dyeing or printing textile fibers or fabrics and for thermal transfer have the formula ##STR1## where R.sup.1 and R.sup.2 are each substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl or substituted or unsubstituted C.sub.3 -C.sub.4 -alkenyl or R.sup.1 may also be hydrogen,

Azo dyes with a coupling component of the quinoline series

Thiazoleazo dyes useful for dyeing or printing textile fibers have the formula ##STR1## where R.sup.1 is hydrogen, substituted or unsubstituted C.sub.1 -.sub.6 -alkyl, halogen, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, substituted or unsubstituted C.sub.1 -C.sub.6 alkythio, substituted or unsubstituted phenylthio, C.sub.1 -C.sub.6 -alkylsulfonyl, substituted or unsubstituted phenylsulfonyl or C.sub.1 -C.sub.4 -alkoxycarbonyl,

Thiazoleazo dyes having a coupling component of the diphenylamine series

Basic azo dyes useful for dyeing or printing polymeric material have the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkanoylamino,

Basic azo dyes with a coupling component of the

Use of heterocyclic compounds as bleach activators or optical

Thiopheneazo dye I which are chiefly useful as disperse dyes for dyeing textile material, in particular polyesters, have the formula ##STR1## where the substituents are as defined in the description.

Azo dyes with A2-aminothiophene dye azo component and a coupling

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Heidelberg, Germany

Erwin Hahn