Bayer Aktiengesellschaft

Siegfried Oeckl

Wilfried Paulus

Hermann Genth

Wilhelm Brandes

Hans-Georg Schmitt

Peter Kraus

Friedrich Martinola

Wilhelm Stendel

Paul Reinecke

Otto Schallner

Karl-Heinz Kuck

Reinhard Halpaap

Hans Scheinpflug

Karl H Schundehutte

Dieter Mager

Peter M Lange

Alfred Mitschker

Heinz-Joachim Rother

Gerold Schade

Walter Radt

Harald Mertes

Gero Zahl

Paul Thomas

The present invention relates to an improved process for the continuous preparation of polyisocyanates with a biuret structure comprising the steps of continuously reacting excess amounts of organic diisocyanates having exclusively aliphatically and/or cycloaliphatically bound isocyanate groups with organic diamines having exclusively aliphatically and/or cycloaliphatically bound primary amino groups at temperatures above 170&deg; C. and adding acid before or during the reaction.

Process for the preparation of polyisocyanates with a biuret structure

The invention relates to the use of macroporous weakly-basic anion exchangers, charged with palladium or platinum and based on crosslinked polystyrene, as catalysts for the removal of oxygen from aqueous media by catalytic reduction, a process for the preparation of these catalyst resins, and new macroporous weakly-basic anion exchangers, charged with palladium or platinum and based on crosslinked polystyrene, in which the amino groups are primary or secondary amino groups.

Catalyst resins for the catalytic reduction of oxygen in aqueous media,

The invention relates to a new process for the preparation of strongly acid cation exchangers loaded with catalytically active metals by loading the cation exchangers with a solution of a salt of the catalytically active metal and reducing the cation exchangers loaded with metal ions, according to which the loading of the cation exchangers is carried out at temperatures from 50.degree. to 120.degree. C. and formic acid is used as the reducing agent; the invention also relates to the catalyst resins which can be obtained by the process.

Catalyst resins and process for their preparation

Halogenopropargylformamides of the formula ##STR1## in which R is hydrogen, alkyl, halogenoalkyl, cycloalkyl, halogenoalkyl, cycloalkyl, alkenyl, alkinyl, halogenoalkinyl, optionally substituted aralkyl and optionally substituted aryl, and

Halogenopropargylformamide pesticides

The new halogenated sulphides of the formula ##STR1## in which R.sup.1 to R.sup.8 are identical or different and denote hydrogen or halogen, at least one of the radicals R.sup.1 to R.sup.8 representing halogen, and wherein

Halogenated sulphides, process for their preparation and their use in

The new azolylmethylamines can be prepared by reaction of amines and azoles with formaldehyde. They can be used in microbicidal agents.

Microbicidal azolylmethylamines

Alkylene(cycloalkylene)-bis-heterocyclyl-biguanides of the formula ##STR1## in which A and B each independently is a nitrogen-containing heterocyclic radical which is linked via a nitrogen atom,

Fungicidal alkylene(cycloalkylene)-bis-heterocyclyl-biguanides

A process for preparing 2,3-dichlorosulphonyl-acrylonitriles is disclosed by reaction of 3-sulphonyl-propionitriles of the formula

Process for the preparation of 2,3-dichlorosulphonyl-acrylonitriles

The preparation of a 2-halogeno-3-sulphonyl acrylonitrile from a 2,2-dihalogeno-3-sulphonyl propionitrile and water and the use of the product as a microbicidal agent are disclosed.

Process for the preparation of 2-halogeno-3-sulphonyl-acrylonitriles

Acid halides and anhydrides of acids of the formula ##STR1## with the substituent definitions given in the description are obtained by reacting the corresponding acids with organic or inorganic acid halides or acid anhydrides. The new compounds are intermediate products for the preparation of new reactive dyestuffs.

Carboxylic acid derivatives

A method of combating bacteria comprising applying to the bacteria, or to a habitat thereof, an acylhalogenomethyl thiocyanate of the formula ##STR1## in which R is alkyl with up to 6 carbon atoms, thienyl, phenyl, naphthyl, or phenyl substituted by halogen, hydroxy, alkyl with 1 to 4 carbon atoms, alkoxy with up to 4 carbon atoms, nitro or phenyl,

Combating plant bacteria with acylhalogenomethyl thiocyanates

An aryl-thiocarboxylic acid thiocyanomethyl ester of the formula ##STR1## wherein R.sup.1 represents an optionally substituted aryl radical; a process for preparing the same, a pesticidal composition comprising such aryl-thiocarboxylic acid thiocyanomethyl ester and the use of such aryl-thiocarboxylic acid thiocyanomethyl ester as a pesticide especially for combatting microbes and molluscs. The novel esters are particularly effective agents for protecting industrial materials and living plants.

Aryl-thiocarboxylic acid thiocyanomethyl esters

Compounds useful as antimicrobial and microbicidal compounds have the formula ##STR1## wherein R.sup.1 is optionally halogen-substituted lower alkyl or optionally substituted aryl,

Growing community of inventors

Cologne, Germany

Siegfried Oeckl