Bayer Aktiengesellschaft

Bayeraktiengesellschaft

Rudolf Casper

Werner Obrecht

Hartmuth Buding

Peter Wendling

Karl-Heinz Ott

Rudiger Musch

Gerd Sylvester

Wilhelm Gobel

Gerhard Hohmann

Gottfried Pampus

Wolfgang Konter

Wolfgang Baade

Christian Lindner

Herbert Eichenauer

Hans-Eberhard Braese

Manfred Beck

Peter R Muller

Eberhard Muller

Wilfried Nolte

Joachim Doring

Christian Ohm

Josef Heinrich

Kurt-Peter Meurer

Karl-Heinz Schabel

Klaus Siemer

Hugo Zimmermann

Hans E Braese

Bernhard Will

Bernhard A Wolf

Kurt P Neurer

Roland Grober

A solution polymerisation process carried out continuously in a cascade produces high molecular weight gel-free ethylene terpolymers having on the one hand high resistance to fuels, oils and organic solvents and on the other hand high flexibility even at low temperatures when narrow ranges are adhered to in respect of solvent content, pressure, temperature control and degree of conversion.

Continuous process for the production of ethylene/vinyl ester terpolymers

High molecular weight, gel-free ethylene/vinyl acetate copolymers may be prepared by the process of solution polymerization if a particular relationship of temperature/pressure is observed.

Solution polymerization for the preparation of gel-free ethylene/vinyl

The invention relates to a polychloroprene rubber which shows advantages over the prior art in the sum total of its performance properties, namely vulcanization rate, tensile strength, elongation at break, modulus, tear propagation resistance and thermal stability of the vulcanizate.

Polychloroprene mixtures

Thermoplastic moulding compositions consisting of

Thermoplastic moulding compositions of ABS and hydrogenated nitrile

An advantageous process for the heterogeneous catalytic hydrogenation of nitrile group-containing unsaturated polymers retaining nitrile groups, is characterised in that palladium supported on alkaline earth metal carbonates is used as hydrogenation catalyst.

Process for hydrogenating nitrile group-containing unsaturated polymers

Storage-stable polychloroprene is obtained, using a polymerization initiator comprising a mixture of

Polymerization of chloroprene

Thermoplastic moulding materials made from vinyl chloride polymers and

2,3-Dichlorobutadiene-(1,3) is obtained from 2,3,4-trichlorobutene-1 by dehydrohalogenation in the presence of a phase transfer catalyst, an inhibitor and oxygen according to an improved process in which the aqueous solution of an alkali metal hydroxide is added to the mixture of trichlorobutene, catalyst, inhibitor and optionally water, and the reaction is carried out at a temperature of from -10.degree. to +60.degree. C. under an inert gas which contains from 0.1 to 8% by weight of oxygen.

Process for the production of 2,3-dichlorobutadiene-(1,3)

An improved process of polymerizing an aqueous emulsion of chloroprene monomer stabilized with phenothiazine wherein polymerization is initiated in the presence of phenothiazine stabilizer and molecular oxygen with a polymerization initiator comprising sodium dithionite.

Polymerizing phenothiazine stabilizer chloroprene in the presence of an

A process for the production of polychloroprene mixtures of sol and gel polymers in a ratio, by weight, of rom 1:4 to 9:1, the gel polymer being produced by radical emulsion polymerization from chloroprene in the presence of 4 to 10% by weight of water soluble disproportionated abietic acid, and the sol polymer being produced by radical emulsion polymerization of chloroprene in the presence of not more than 3.5% by weight of a water soluble disproportionated abietic acid with the polychloroprene mixture containing at most 3.8% of said acid.

Process for the production of chloroprene polymer mixtures

In order to control noxious substances in the air, the air to be monitored is continuously drawn through an absorber. An absorber with a suction pump connected downstream is used for this purpose. A particularly small and compact device composed of an absorber and suction pump may be obtained by forming the inlet valve and outlet valve of the suction pump as O-ring disc valves and by providing the pump drive with a light barrier.

Absorber with suction pump

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

Thermoplastic PVC resin compositions

Growing community of inventors

Leverkusen, Germany

Rudolf Casper