Basf Aktiengesellschaft

Gasf Aktiengesellschaft

Stefan Beckmann

Karl-Heinz Etzbach

Rudiger Sens

Ruediger Sens

Helmut Reichelt

Clemens Grund

Andreas Johann Schmidt

R Udiger Sens

Gerhard Nestler

Karl Siemensmeyer

Ernst Schefczik

Oskar Nuyken

Heinrich Aichinger

Holger Herbst

J&uuml;rgen Schr&ouml;der

Peter Strohriegl

Martin Holderbaum

Rudolf Zentel

Harry Mueller

Karl H Aberle

Frank Wurthner

Manfred Eich

Michael Doerr

In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off and then the oxyesters contained in it are cleaved in the presence of a relatively long-chain alkylbenzenesulfonic acid at elevated temperatures.

Method for esterifying (meth)acrylic acid with an alkanol

Trifluormethylpyridone based indolenine methine dyes

The present invention relates to trifluoromethylpyridone-based methine and azamethine dyes of the formula I ##STR1## a process for their thermal transfer, a process for dyeing or printing synthetic materials and their use.

Methine and azamethine dyes based on trifluoromethylpyridones

Azamethine dyes

Polymerizable azo dyes I ##STR1## in which R.sup.1 is an aryl group,

Polymerizable azo dyes with a thiophene structure

Phenol derivatives, their preparation and their use, in particular in

Methine and azamethine dyes based on naphthoquinones in nonlinear optics

A process for preparing alkyl cyanoacetates of the general formula I ##STR1## where R is an n-valent aliphatic radical which has 6 to 20 carbon atoms and whose carbon framework can be interrupted by one to three oxygen atoms in ether functionality, and n is a number from 1 to 6, by reacting cyanoacetic acid in aqueous medium with an alcohol R(OH).sub.n, where the esterification is carried out in the presence of an inert entrainer and, during the reaction, water and entrainer are distilled out.

Preparation of alkyl cyanoacetates

Thienothienylazoanilines in nonlinear optics

Thiazolemethine dyes

Diphenylamine compounds, polymers prepared therefrom and non-linear

Thiazolemethine dyes of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.8 -alkyl with or without substitution, C.sub.3 -C.sub.4 -alkenyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl or tolyl, or are together with the nitrogen atom joining them together a heterocyclic radical,

Azo dyestuff- and urethane-containing polyadducts comprising

Azo dyestuff- and urethane-containing polyadduct and its use in

Linked azo dyes

A copolymer based on monomers selected from the group consisting of dicarboximides, alkenyl isocyanates and alkenylurethanes of formula I: ##STR1## where R.sup.1 to R.sup.5, R.sup.6, X, Y, Z, M, and a-d are as defined in the specification.

Copolymers based on dicarboximides, alkenyl isocyanates and/or

Growing community of inventors

Bad Durkheim, Germany

Stefan Beckmann