Bayer Aktiengesellschaft

Heinrich Konigshofen

Hartmuth Buding

Zsolt Szentivanyi

Joachim Thormer

Otto Ganster

Wolfgang Baade

Gabor Kaszas

Klaus Nachtkamp

Manfred Beck

Horst Muller-Albrecht

Dieter W Bruck

Rainer Trinks

Hans-Josef Buysch

Pieter Ooms

Thomas Scholl

Lutz Schmalstieg

Ernst Roos

Hermann-Josef Weidenhaupt

Rudiger Musch

Peter R Muller

Ulrich Eisele

Ulrich Notheis

Gunter Arend

Wilfried Nolte

Christian Laue

Horst Stepanski

Adolf Sicheneder

Paul Fiedler

Marko Zlokarnik

Ursula Pentling

Werner Jeblick

Ralph Ostarek

Hans J Laas

Jose Colinas-Martinez

Alfred Nierth

Jurgen Wassen

Heinz W Lucas

Hans-Jorg Uhlmann

Reiner Witkowski

Lother Ruetz

Eduard Haensel

An improved process is provided for the bromination of isoolefin-conjugated diolefin polymers by brominating said polymer in solution in selected halogen-containing hydrocarbons as solvent. There is also provided an improved product of said process wherein the brominated polymer contains not less than 80 percent of the bound bromine atoms in a form suitable to participate in the vulcanization of the polymer and wherein not less than 70 percent of the bound conjugated diolefin units are similarly so brominated.

Polymer bromination process in solution

An improved process is provided for the bromination of isoolefin-conjugated diolefin polymers by brominating said polymer in solution in a solvent comprising a mixture of an inert saturated paraffinic hydrocarbon and an inert halogen-containing hydrocarbon. There is also provided an improved product of said process wherein the brominated polymer contains not less than 70 percent of the bound conjugated diolefin units which are brominated and also not less than 80 percent of the bound bromine atoms are in a form suitable to participate in the vulcanization of said polymer.

Polymer bromination process

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.

Process for the preparation of dithiazolyl disulfides

The present invention is directed to a novel adhesive which is a mixture of

Mixtures of aqueous polymer dispersions

The rubber mixtures according to the invention, containing at least one rubber, a filler, optionally additional rubber auxiliaries and at least one polysulphide polyether silane corresponding to the formula

Rubber mixtures containing polysulphide polyether silanes

4-aminodiphenylamines are produced by hydrogenating nitrobenzene with hydrogen in the presence of bases containing hydroxide and/or oxide groups and heterogeneous catalysts and in the presence of inert aprotic solvents at temperatures of 0 to 200.degree. C. and pressures of 0.1 to 150 bars.

Process for producing 4-aminodiphenylamine

An improved process is provided for the bromination of isoolefin conjugated diolefin polymers by brominating said polymer in solution in a solvent comprising a mixture of an inert saturated paraffinic hydrocarbon and an inert halogen-containing hydrocarbon. There is also provided an improved product of said process wherein the brominated polymer contains not less than 70 percent of the bound conjugated diolefin units which are brominated and also not less than 80 percent of the bound bromine atoms are in a form suitable to participate in the vulcanization of said polymer.

Disclosed herein are two-component polyurethane reactive compositions containing polyisocyanates and components carrying active hydrogen which are stabilized against separation with a compound in solution containing a NH group or NH.sub.2 group and a C--N multiple bond or N--N multiple bond.

Two-component polyurethane reactive compositions

Disclosed herein is a two-component polyurethane adhesive containing an isocyanate component a), an active hydrogen containing component which is stable against demixing b), optionally a catalyst for the reaction of a) with b) and optionally an auxiliary agent and an additive, characterized in that an active hydrogen containing component which is stable against demixing b) contains at least one hydroxyl group-containing low molecular weight chain lengthening agent having at least one C-C double bond or C-C triple bond and having a molecular weight of at least 86 and a functionality of at least 2 and containing no carboxyl groups.

Two-component polyurethane adhesives

Brominated chlorine-substituted poly-1,3-butadiene is produced by a process in which an aqueous chlorine-substituted poly-1,3-butadiene latex is reacted in aqueous phase with a brominating agent in the presence of a radical-forming catalyst and/or in the presence of light at a pH value below 7 and at a temperature of 20.degree. to 95.degree. C., the brominated reaction product is optionally precipitated from the aqueous dispersion obtained and then separated from the aqueous liquid.

Process for the production of brominated chlorine-substituted

Disclosed herein is a process for bonding substrates comprising applying a hot-melt adhesive to the surface of at least one of the substrates and contacting the surface of said substrate with the surface of the other substrate, said adhesive containing an ester group-containing polyisocyanate which is a solid below 30.degree. C. and liquid above 100.degree. C., corresponding to formula (I)

A process for bonding substrates with an ester group-containing hot melt

The present invention is directed to a mixture which can be used as an adhesive. The mixture broadly contains 1) a hydroxy group containing polyurethane, and 2) a polycarbonate and/or a polycaprolactone.

Polyurethane mixtures and the use thereof as adhesives

Adhesive mixture

Covulcanizates with good mechanical properties obtained from mixtures of (a) from 50 to 5% by weight of chlorinated or chlorosulphonated polyethylene, acrylate rubber or ethylene vinyl alcohol copolymers and (b) from 50 to 95% by weight of partially or completely hydrogenated nitrile group-containing elastomers containing from 25 to 140 nitrile nitrogen atoms and less than 35 double bonds for each 1,000 carbon atoms, by cross linking.

Polymer mixtures and covulcanizates produced therefrom

Growing community of inventors

Bergisch Gladbach, Germany

Heinrich Konigshofen