Bayer Aktiengesellschaft

Agfa Gevaert Nv

Bayer Corporation

Agfa-Gevaert

Karin Hassenruck

Peter Wild

Horst Berneth

Paul R Callant

Frank-Michael Stohr

Stephan Michaelis

Winfried Mennicke

Peter Roschger

Herman J Uytterhoeven

Roderich Raue

Klaus Wunderlich

Karlheinrich Meisel

Henry Giera

Fritz Puchner

Martin Michna

Karl-Heinz Reinhardt

Luc Bastiaens

Gerd-Friedrich Renner

Rolf Richter

Roger Nyssen

Dirk Pfutzenreuter

Felix Reichel

Guy Michel Van Ackere

Karl Lange

The present invention relates to a method for ink-jet printing with a printing ink containing a pigment preparation containing

Pigment preparations useful for ink-jet printing

Process for the production of cyanine dyes

The present invention relates to an infra-red laser sensitive thermographic material and to a process for forming a heat mode image using such a material.

Method and material for the formation of a heat mode image

Method for reducing the toxicity of spent liquors and novel cationic dyes

Dyestuffs of the formula (I) ##STR1## wherein R.sup.1 and R.sup.4 independently of one another represent an acyl radical,

Direct disazo dyestuffs

The new dyestuffs of the formula (I) ##STR1## wherein the substituents R and R.sup.1 and the index n have the meaning given in the description, are outstandingly suitable for dyeing and printing cellulose-containing materials, in particular for the preparation of recording liquids for ink jet recording systems.

Azodyestuffs, their preparation and their use

New azo dyestuffs of the formula (I) ##STR1## wherein n in each case independently of one another represents 0 or 1,

Azo dyestuffs for dyeing and printing cellulose-containing fiber

A process has been found for dyeing and printing pater, wood, plastic or metal, in which dyestuffs which, in the form of the free acid, correspond to the formula (I) ##STR1## wherein A denotes a phenol radical which is optionally substituted by alkyl or cycloalkyl and n represents 0 or 1,

Dyestuffs for printing inks

The new polymeric dyestuffs which are obtainable by reaction of A) Polyamidoamines having an average molecular weight, determined as the weight-average, of 260 to 10,000, which in turn are obtainable by reaction of aliphatic polyamines (I) which contain at least two primary amino groups and at least one secondary amino group, if appropriate as a mixture with diamines (II), with dicarboxylic acids (.alpha.), with the proviso that the molar ratio of the sum of primary and secondary amino groups contained in (I) and if appropriate (II) to the carboxyl groups in (.alpha.)&gt;1, and is preferably 1.05 to 3, with B) a dyestuff which contains, per molecule, at least one group which is reactive towards primary and secondary amino groups, the molar ratio of the sum of primary and secondary amino groups contained in A) to B) being 1 to 15, preferably 1 to 10, are outstandingly suitable for dyeing and printing materials containing cellulose groups and amide groups and as recording liquids for ink jet recording systems.

Polymeric dyestuffs and their use in inks for ink jet printing processes

Novel dyestuffs of the formula (I) ##STR1## in which DK denotes a radical of the formula ##STR2## where m is 1 or 2 and DK' denotes a radical of the formula ##STR3## where n is 1 or 2 R.sub.1 represents hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkyl,

Triazinyl-amino bridge-containing disazo dyestuffs

Novel dyestuffs have been found which are obtainable by reacting

Dyestuffs and their use in inks for ink-jet printing processes

The new basic azo dyestuffs of the formula ##STR1## wherein the symbols have the meaning given in the description, are suitable for dyeing synthetic and naturally occurring substrates which can be dyed with basic dyestuffs.

Basic azo dyestuffs of the 3-cyano-2,4,6-triamino pyridine series

New azinoneutromethines of the formula ##STR1## in which the symbols used have the meaning given in the description, a process for their preparation and their use in thermal and photochromic recording materials, as nonlinear optical materials, as photoconductors in electrophotography and for dyeing fibres and woven fabrics of polyester and plastics.

Azinoneutromethines

The new carbonylaminostyryls of the formula (I) ##STR1## in which the substituents R.sub.1, A, B and Z have the meaning given in the description, are especially suitable for the production of recording materials which can be used for pressure-sensitive copying, or of thermoreactive or electrochromic recording materials.

Growing community of inventors

Dusseldorf, Germany

Karin Hassenruck