Basf Aktiengesellschaft

Basf Se Corporation

Dirk Funhoff

Reinhold Schwalm

Horst Binder

Karl Siemensmeyer

Ulrike Licht

Harald Fuchs

Wolfgang Schrepp

Friedrich Closs

Karl-Heinz Etzbach

Bernd Stein

Dietrich Haarer

Matthias Frauenkron

Ortmund Lang

Helmut Ringsdorf

Bernd Rumpf

Thomas Manderbach

Peter Schuhmacher

Hans Schupp

Gerhard Wegner

Peter Strohriegl

Werner Hickel

Lukas Haussling

Wolfgang Knoll

Wolfgang Brox

Lukas Haeussling

Juergen Simmerer

Gisela Duda

Thomas Frey

In a process for the purification of triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is passed into a liquid solvent and is subsequently crystallized from this, the mother liquor obtained after the TEDA has been crystallized is extracted with an extractant which is immiscible or only slightly miscible with the solvent of the mother liquor and in which TEDA is readily soluble, and the TEDA-depleted mother liquor obtained after extraction and/or the TEDA-enriched extractant which has been used for the extraction are/is returned to the process.

Work-up of the mother liquor obtained in the preparation of high-purity triethylenediamine

The invention relates to the preparation of pure triethylenediamine (TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250&deg; C., passing the vapor-form TEDA into a liquid solvent, and subsequently crystallizing the TEDA out of the resultant solution.

Process for the preparation of pure triethylenediamine (TEDA)

Positive-working radiation-sensitive mixtures, essentially consisting of

Radiation-sensitive mixture and the production of relief structures

A positive-working radiation-sensitive mixture essentially consists of

Positive-working radiation-sensitive mixture and production of relief

Positive-working radiation-sensitive mixture

A radiation-sensitive mixture essentially consisting of

Radiation-sensitive mixture

Triphenylene compounds and preparation of discotic liquid crystalline

A positive-working UV-sensitive mixture containing (a1) an organic binder containing acid-labile ether, ester or carbonate groups or (a2) a polymeric binder which is insoluble in water but soluble in aqueous alkaline solutions and (a2.1) an organic compound whose solubility in an aqueous alkaline developer is increased by the action of an acid, or

Positive-working radiation-sensitive mixture and the production of

In an electroluminescent arrangement containing one or more organic layers, at least one of the layers is obtained by thermal or radiation-induced crosslinking and at least one charge-transporting compound is present per layer. The novel arrangements are very suitable, for example, for the production of displays.

Electroluminescent arrangement

Low-molecular-weight and polymeric liquid-crystalline 2-substituted benzotriazoles of the formula ##STR1## are used as photoconductors or electrophotographic recording materials or as fluorescent dyes for fluorescent displays.

Low-molecular-weight and polymeric liquid-crystalline benzotriazoles,

The present invention relates to photoconductors composed of low molecular weight or polymeric organic compounds with liquid crystal properties, where the photoconduction in the discotic phase is higher than in the non-liquid-crystal phases, and to a method for increasing the photoconductivity by molecular ordering in photoconductors.

Increasing photoconductivity by adjusting the discotic phase

A radiation-sensitive mixture which contains

Radiation-sensitive mixture containing acid-labile groups and production

(Meth)acrylate copolymers and their use in nonlinear optics and for the

The novel compounds of the general formula I ##STR1## where X is straight-chain or branched alkanediyl having from 1 to 20 carbon atoms or

Compounds which are ethylenically unsaturated in the terminal position,

Information stored in a thin polymer layer is read out in a process wherein information introduced into a thin polymer layer on a metallic or semiconductor layer by electromagnetic or particle rays which produce a permanent change in the properties of the polymer layer in the irradiated areas is read out using surface plasmons.

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Heidelberg, Germany

Dirk Funhoff