Bayer Aktiengesellschaft

Bayer Corporation

Bayer Aktiengellschaft

Rudiger Schubart

Rudiger Musch

Ulrich Eholzer

Ernst Roos

Theo Kempermann

Wolfgang Ebert

Heinrich Alberts

Klaus Naumann

Gerhard Fennhoff

Richard Weider

Ralf Hufen

Wilhelm Gobel

Erich Klauke

Rolf-Volker Meyer

Rainer A Fuchs

Karsten-Josef Idel

Karsten J Idel

Winfried Joentgen

Rudolf Braden

Alfred Pischtschan

Harald Pielartzik

Torsten Groth

Manfred Dahm

Klaus Kircher

Eckart Kranz

Thomas Schmidt

Rick L Archey

Charles E Lundy

Hans Magg

Peter Siegle

Paul Uhrhan

Gottfried Pampus

Gerhard Hohmann

Thomas Menzel

Bernhard Lehmann

Hans-Wilhelm Engels

Aaron D Meltzer

Ulrich Nehen

Anthony Sumner

Herbert Schwarz

Manfred Abele

Heinrich Steude

Stefan Kelbch

Ulrich Litzinger

Michael Happ

Manfred Blazejak

Manfred Pieroth

Klaus-Dieter Albrecht

Gunter P Langner

Ralf Moritz

The plasticity of ceramic compositions and dispersions can be improved by addition of at least one polymer (I) with recurring succinyl units. This effect can be reversed by addition of a setting accelerator (II); preferred setting accelerators are polymers (II) of the polyalkylenepolyamine type.

Process for improving the plasticity of ceramic composition and for

The invention relates to a process for preparing polymers having repeating succinyl units, especially polysuccinimide and polyaspartic acid, with increased M.sub.W values at non-increased, moderate synthesis temperatures and at the same time without increased polycondensation times, using maleic anhydride and ammonium carbonate plus a catalyst.

Process for the preparation of polymers with repeating succinyl units

Process for preparing polymers with recurring succinyl units

Compositions comprising new halogenated butyl rubbers with a defined, low content of halogen, a defined content of non-halogenated double bonds and a defined content of anti-agglomeration/vulcanisation control agents and containing polymer compounds comprising special amidines, mercapto or zinc mercapto compounds and polymers possess outstanding mechanical and physiological properties, so that they are suitable for the production of tyres, particularly tyre inner liners, tyre sidewalls and tyre treads.

Polymer compounds and their use for the vulcanization of halogenated

The polymer compounds according to the invention prepared from specific amidines, zinc mercapto compounds and elastomers are ideally suitable for the production of thermally stable rubber vulcanisates containing halogen. The vulcanisates of rubbers containing halogen obtained by means of the polymer compounds are distinguished by a reduced tendency towards unwanted post-vulcanization and, at elevated storage temperatures, are resistant to thermal and oxidative degradation.

Polymer compounds and the use thereof for vulcanising rubbers containing

The polymer compounds according to the invention, comprising special amidines, mercapto compounds and elastomers, are mainly suitable for the production of thermally stable, halogen-containing vulcanized rubbers. The vulcanized, halogen-containing rubbers obtained by means of the polymer compounds are distinguished by a reduced tendency to undergo unwanted subsequent vulcanization and are stable towards thermal and oxidative degradation at high storage temperatures.

Polymer compounds and their use for the vulcanisation of

The present invention relates to polycarbonate molding compositions containing polycarbonates, stabilizers of general formula ##STR1## and optionally polypropylene glycols. The present invention also relates to the use of these molding compositions for the production of articles for medical applications.

(Co)polycarbonates stabilised against .gamma.-radiation

A thermoplastic molding composition stabilized against .gamma.-rays and its application for manufacture of medical equipment is disclosed. The composition contains an aromatic polycarbonate and (i) dialkyl and/or dicycloalkyl monosulfides or polysulfides in an amount of 0.001 to 5 weight %, and optionally (ii) aliphatic or cycloaliphatic monoalcohols or polyalcohols or their derivatives in an amount of 0.001 to 2 weight % said percent being relative to 100 weight % of aromatic polycarbonate.

Radiation-resistant polycarbonates

The invention relates to a new process for the preparation of known .beta.-halogeno-tert.-alkylcarboxylic acid chlorides of the general formula (I) ##STR1## in which X represents chlorine,

Process for the preparation of .beta.-halogeno-tert.-alkyl-carboxylic

The invention relates to a process for the preparation of known .beta.-halogeno-tert.-alkyl isocyanates of the formula ##STR1## in which X represents chlorine,

Process for the preparation of .beta.-halogeno-tert.-alkyl isocyanates

The invention relates to a new process for the preparation of known .beta.-halogeno-tert.-alkyl isocyanates of the formula ##STR1## in which X represents chlorine,

The metal oxide vulcanization of polychloroprene in the presence of amidine compounds, but in the absence of magnesium oxide, leads to vulcanizates which are capable of withstanding high temperatures, even under dynamic stress.

Process for the vulcanization of polychloroprene

The elminination of sulfur from bis-(dialkoxythiophosphoryl)-tetrasulfides to bis-(dialkoxythiophosphoryl)-trisulfides on certain silicate fillers, carbon black and aluminium oxide is quantitative.

Process for the production of bis-(dialkoxythio-phosphoryl)-trisulfides

The strength of the bond between a metal and vulcanized rubber may be increased by a bonding agent containing at least one organic cobalt compound and at least one boric acid ester.

Process for the preparation of rubber/metal composite materials with a

The invention relates to a process for the preparation of high molecular weight, optionally branched polyarylene sulphides with melt viscosities which can be adjusted within a defined range, a high stability of the melt and low corrosion. These polyarylene sulphides are obtained by reacting alkali metal sulphides, if appropriate mixed with alkali metal bisulphides and reaction accelerators, with dihalogenoaromatics and, if appropriate, polyhalogenoaromatics, with the addition of particular monomercapto compounds.

Process for the preparation of high molecular weight, optionally

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Bergisch Gladbach, Germany

Rudiger Schubart