Bayer Aktiengesellschaft

Wilfried Nolte

Adolf Sicheneder

Heinz Esser

Thomas Himmler

Pramod Gupta

Hartmuth Buding

Rudiger Musch

Klaus Walz

Friedhelm Muller

Heinrich Konigshofen

Rudolf Hombach

Wilhelm Gobel

Joachim Thormer

Rudolf Casper

Wolfgang Konter

Hans-Wilhelm Engels

Christian Konig

Harro Schlesmann

Thomas Kleiner

Chiraranjan Podder

Wilfried Keller

Johann Hohn

Paul-Christian Fiedler

Hans E Braese

Heinrich K&ouml;nigshofen

Hans-Jurgen Rabe

Peter J Russell

Nigel G Wall

The invention relates to a new process for the preparation of dithiazolyl-(2,2&prime;)-disulfides by oxidation of 2-mercaptothiazoles, to the dithiazolyl-(2,2&prime;)-disulfides that can be obtained in this way, and to the use thereof.

Process for the preparation of dithiazolyl disulfides

The invention relates to a new process for the preparation of dithiazolyl-(2,2')-disulfides by oxidation of 2-mercaptothiazoles, to the dithiazolyl-(2,2')-disulfides that can be obtained in this way, and to the use thereof.

The preparation of N-cyclohexylthiophthalimide from cyclohexylsulphenyl chloride and phthalimide can be reproduced more reliably if the cyclohexylsulphenyl chloride is prepared in sire by chlorinating dicyclohexyl disulphide.

Process for preparing N-cyclohexylthiophthalimide

The present invention relates to the use of nucleus-substituted 4-hydroxyphenyl propionic acid compounds for stabilizing organic polyisocyanates.

Stabilization of organic polyisocyanates

Hydrogenation products of olefinically unsaturated polymers having nitrile groups prepared in the presence of ruthenium catalysts in a solvent comprising a low-molecular ketone and a secondary or tertiary C.sub.3 -C.sub.6 -alcohol by hydrogenation, can be processed to vulcanizates with improved compression set values.

Hydrogenation of unsaturated polymers containing nitrile groups

A process for the production of storable polychloroprene having reduced tackiness on mixing rolls by the continuous polymerization of chloroprene and, optionally, up to 50%, by weight, of a monomer copolymerizable with chloroprene in aqueous alkaline emulsion in the presence of emulsifiers and radical initiators at temperatures of from 0.degree. to 70.degree. C., followed by isolation, characterized in that from 90 to 150 parts, by weight, of water, from 2.5 to 4.0 parts, by weight of a potassium salt of disproportionated abietic acid (based on acid), from 0.3 to 1.0 parts, by weight, of a condensation product of naphthalene sulphonic acid and formaldehyde and from 0.2 to 1.5 parts, by weight, of potassium hydroxide, all the quantities being based on 100 parts, by weight, of monomer, are used for the polymerization reaction.

Continuous polymerization of chloroprene

A process for the production of synthetic rubber latices by the emulsion polymerization of a monomer mixture of:

Process for the production of synthetic rubber latices, their use as a

High-solids polychloroprene latices are obtained by polymerizing chloroprene, which may contain up to 50%, by weight, of a copolymerizable monomer, in aqueous alkaline emulsion containing emulsifiers and other conventional auxiliaries in the presence of from 0.1 to 2%, by weight, of a primary or secondary hydroxyalkylamine in which the OH-group is separated from the amino nitrogen atom by at least two carbon atoms, polymerization being carried out to a conversion of more than 80%.

Process for the polymerization of chloroprene

New surface-active phosphonic acid esters, which are inter alia suitable as emulsifiers and dispersants, a process for their preparation and emulsions and dispersions of water soluble polymers containing the new phosphonic acid esters and having high stability on storage.

Surface-active phosphonic acid esters

Process for producing a cationic polychloroprene latex by homo- or copolymerizing chloroprene in an aqueous emulsion in the presence of ammonium salts of inorganic or organic acids as emulsifiers wherein the polymerization is carried out in presence of an alkaline earth and/or alkali salt of an organic carboxylic acid or in presence of a mixture of Na.sub.2 HPO.sub.4 and KH.sub.2 PO.sub.4. The latex thus obtained may be mixed with a bitumen emulsion and can be used for the protection of building or in road construction.

Process for the production of a cationic polychloroprene latex and a

A process for polymerizing chloroprene which may contain as much as 50% by weight of a copolymerizable monomer, in an alkaline aqueous emulsion, of which the alkali ions at least partially consist of potassium, into a latex rich in solid matter having a solid content of from 50 to 65% by weight in the presence of an alkali salt of disproportionated abietic acid and a formaldehyde condensate with naphthalene sulphonic acid and also an alkali hydroxide, whereby polymerization is carried out until there is a conversion of more than 90% characterized in that

Process for the production of polychloroprene latices rich in solid

Thermoplastic moulding compositions of 20 to 90% by weight of polyvinyl chloride and, accordingly, 10 to 80% by weight of a mixture of

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Leverkusen, Germany

Wilfried Nolte