Basf Aktiengesellschaft

Martin Holderbaum

Hubert Trauth

Alexander Aumuller

Guido Voit

Alexander Aumueller

Tom Witzel

Karin Sperling

Helmut Reichelt

Horst Westenfelder

Stefan Beckmann

Matthias Dernbach

Clemens Grund

Thomas Wunsch

Alfred Krause

Hans-Jurgen Weyer

Wolfgang Goetze

Jurgen Krockenberger

Cosmetic preparations containing photostable UV-A filters

Preparation of 2-cyano-3,3-diarylacrylic esters

A process for removing water and ammonia from benzophenone imine reactor effluents resulting from the catalytic reaction of benzophenones of the formula I ##STR1## where R.sup.1 and R.sup.2, have the meaning stated in the specification and wherein ammonia is distilled off from effluents and wherein water is either distilled off from the effluents over removed non-distillatively.

Removal of water and ammonia from benzophenone imine reactor effluents

2-cyanoacrylic esters

3-arylacrylic acid ester light-protection stabilizers for organic

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

A process for preparing benzophenone imines of the general formula I ##STR1## where R.sup.1 to R.sup.6 are hydrogen, C.sub.1 -to C.sub.4 -alkoxy, C.sub.1 -to C.sub.2 -alkylamine or C.sub.2 -to C.sub.4 -dialkylamine, by reacting benzophenones of the general formula II ##STR2## where R.sup.1 to R.sup.6 have the abovementioned meanings, in liquid ammonia in the presence of oxides of the elements boron, aluminum, gallium, indium, silicon, germanium, tin, lead, phosphorus, arsenic, antimony, bismuth, scandium, yttrium, titanium, zirconium, vanadium, niobium, tantalum or mixtures thereof at from 50.degree. to 150.degree. C. and from 50 to 350 bar is described.

Preparation of benzophenone imines

Polyalkylpiperidine containing acetic acid and 3-amino-acrylic acid

Aminovinylphosphonic ester stabilizers for organic material

Esters and amides of aminomethylenecyanoacetic acid a cosmetic

The use of an aminovinyl-substituted heterocyclic compound of the general formula I ##STR1## in which R.sup.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, or halogen, and, if more than one radical R.sup.1 are present, these may be the same or different,

Aminovinyl-substituted heterocyclic compounds as stabilizers for organic

Growing community of inventors

Ludwigshafen, Germany

Martin Holderbaum