Basf Aktiengesellschaft

Basf Se Corporation

Volker Bach

Karl-Heinz Etzbach

Ruediger Sens

Karl Siemensmeyer

Gerhard Wagenblast

Helmut Reichelt

Gunther Lamm

Axel Paul

Wolfgang Brox

Arno Lange

Stephan Hueffer

Bernd Siegel

Hermann Loeffler

Manfred Herrmann

Harald Fuchs

Clemens Grund

R&uuml;diger Sens

Stefan Schroeder

Guenter Hansen

Ernst Schefczik

Walter Gramlich

Guenter Scherr

Günter Scherr

Stephan Hüffer

G&uuml;nther K&ouml;nig

Herbert Rothmaier

Manfred Ruske

Sabine Gruettner-Merten

Oliver Reese

Tilman Luedecke Taeger

Sabine Gruettner

Philippe Lamalle

Klaus Unterforsthuber

Paul Richter

Thorsten Raedler

Rosemarie Rausch-Krebs

Kark-Heinz Etzbach

Gehard Wagenblast

Juergen Carle

A semifinished leather product is produced from an animal hide by pretanning with the use of a chromium-free tanning agent and of a clay mineral which, after stirring for 30 minutes in water at 50&#xb0; C. at a circumferential rotor speed of from 5 to 25 m/s, has a number average particle diameter of less than 2 &#x3bc;m or a bimodal particle size distribution with a first, finely divided fraction whose number average particle diameter is less than 0.5 &#x3bc;m and a second, coarser fraction whose number average particle diameter is less than 5 &#x3bc;m, determined in each case by the method according to ISO 13320-1, by combined laser light diffraction and light scattering, a proportion of the first, finely divided fraction being from 10 to 90% by weight, and drying of the pretanned animal hide to a water content of from 5 to 45%, based on the total weight of the semifinished leather product.

Method for producing a leather semi-finished product

Adducts are obtained by reacting carbonyl compounds of the formula I where Rand Rare as defined, with cyclic compounds of the formula II where X is selected from oxygen, sulfur and N&#x2014;R, R-Rare as defined, and n is an integer from 1 to 4, which adducts are useful as tanning agents and preservatives.

Adducts based on cyclic compounds and the use thereof as tanning agents and curing agents

Dye preparations comprising, based in each case on the weight of the preparation, from 0.1 to 30% by weight of one or more dyes from the class of the mono- or polyazo dyes containing no acidic groups, from 0.1 to 20% by weight of a dispersant based on an arylsulfonic acid-formaldehyde condensate or from 0.1 to 20% by weight of a water-soluble dispersant based on alkoxylated phenols with or without water, and their use as inks in the inkjet process and for textile sublimation transfer printing.

Dye preparations comprising azo dyes

Dye preparations containing azo dyes

Pyridone dyes

The process according to the invention is a process for the production of aligned, ferroelectrically or ferrielectrically or antiferroelectrically ordered materials which solidify in a glass-like manner. In these layer structures with polar order, the molecular dipole moments are uncompensated, partially compensated or fully compensated, so that a dipole moment corresponding to the degree of compensation, acts externally.

Production of a ferroelectric or antiferroelectric or ferrielectric

Azo dyestuffs containing a diazo component from the aniline series and

In a novel process for the reversible or irreversible production of an image by the imagewise action of energy on a recording layer, resulting in a pattern of surface charges which corresponds to the imagewise action of the energy, on the surface of the recording layer, the recording layer used is one which contains or consists of an organic material which solidifies in glassy form, is nonphotoconductive or only slightly photoconductive and has permanent dipoles, wherein the pattern of surface charges is produced, without or almost without formation of free charge carriers, by reversible imagewise orientation of some or all of the permanent dipoles present in the recording layer, with the aid of an electric field applied imagewise. The novel process is advantageously carried out using a novel apparatus which comprises a suitable recording element, apparatus for the imagewise action of an electric field on the recording layer of the recording element and a counter-electrode which is in direct, non-frictional contact with the recording layer and can be removed again therefrom. The pattern of surface charges which is produced by the novel process can be treated with liquid or solid toners. The resulting toner image can then either be fixed on the recording layer or transferred from the recording layer to another surface, after which the pattern of surface charges can be deleted by uniform action of energy. Thereafter, a further image can be produced. In this way, it is possible to produce photocopies without the high voltage sources required in the conventional electrophotographic processes having to be used.

Reversible or irreversible production of an image

Dye mixtures comprising at least six isochromatic dyes of the formula ##STR1## where D is the radical of a diazo component of the aniline, aminothiophene, aminothiazole, aminoisothiazole or aminobenzisothiazole series and

Dye mixtures containing azo dyes having a coupling component from the

Optically active compounds of the formula I ##STR1## where R is C.sub.1 -C.sub.12 -alkyl or -perfluoroalkyl in which one or two non-adjacent CH.sub.2 or CF.sub.2 groups can also be replaced by --O-- and/or --CO-- and/or --CO--O-- and/or --CH.dbd.CH-- and/or --CH-halogen- and/or --CHCN-- and/or --O--CO--CH-halogen- and/or --O--CO--CHCN--, or is C.sub.1 -C.sub.12 -alkyl which can have a terminal chemically reactive group and in which a CH.sub.2 group can be replaced by --O--,

Optically active phenoxypropionic esters

Liquid-crystalline compounds of the formulae I and II,

Liquid-crystalline compounds

Dye mixtures comprising at least six isochromatic dyes of the formula ##STR1## where D is the radical of a diazo component of the aniline, aminothiophene, aminothiazole, aminoisothiazole or aminobenzisothiazole series and one of the radicals X.sup.1 and X.sup.2 is amino and the other is a radical of the formula ##STR2## where L is unsubstituted or substituted C.sub.2 -C.sub.8 -alkylene

There are described dye mixtures containing

Mixtures of azo dyes for navy to black shades

Methine transfer dyes have the formula ##STR1## where L is a bridge member which does not permit any conjugation of .pi.-electrons between Z and Y,

Bichromophoric cyano-containing methine dyes and transfer thereof

Growing community of inventors

Neustadt, Germany

Volker Bach