Bayer Aktiengesellschaft

Hugo Vernaleken

Dieter Margotte

Uwe Hucks

Siegfried Adelmann

Werner Nouvertne

Dieter Freitag

Hans Rudolph

Rudolf Binsack

Volker Serini

Ludwig Bottenbruch

Claus H Wulff

Dieter Neuray

Gunther Kampf

Gunther Reiff

Hans-Josef Buysch

Peter Bier

Karsten J Idel

Heinrich Schrage

Erhard Tresper

Wolfgang Alewelt

Werner Nielinger

Gerd Sylvester

Eckart Reese

Dietrich Hardt

Manfred Abele

Rudolph Binsack

Rolf Dhein

Karl-Heinz Ott

Hanns P Muller

Hans-Eberhard Braese

Josef Merten

Bert Brassat

Tillmann Hassel

Hans Niederprum

Harald Selbeck

Kurt Weirauch

Johann Nikolaus Meussdoerffer

Gunter Lehr

Helmut Kipphardt

Paul Schiller

Alfred Horbach

Hermann Schirmer

Gunter Peilstocker

Manfred Grundmeier

Werner Obrecht

Hans J Rosenkranz

Herbert Bartl

Josef Witte

Gerhard Darsow

Joachim Wank

Wolfgang Cohnen

Heinrich Haupt

Fritz Mietzsch

Ralf Lange

Burkhard Lachmann

August Bockmann

Michael Happ

Gunther Lenz

Hermann Schnell

Karl-Dieter Lohr

Horst-Gunter Kassahn

Gerhard Emmer

Hilla Schnoring

Karstel Idel

Wolfgang Cohen

Gunter Perlstocker

Diene rubbers are produced in the gas phase by first polymerizing the dienes or diene mixtures in the presence of a catalyst system, which is based on rare earth compounds, at temperatures of from 0 to 150.degree. C. and at pressures of from 1 mbar to 50 bar, so that a pourable diene rubber having a Mooney viscosity ML (1+4', 100.degree. C.) of 70 to 180 Mooney units is obtained, and subsequently subjecting the pourable diene rubber obtained to a chemical or thermal decomposition reaction until a Mooney viscosity of 10 to 70 Mooney units is obtained.

Method for the production of diene rubbers in the gas phase

Catalyst its production and its use for the gas-phase polymerization of

Catalyst, its production and its use for the gas-phase polymerization of

Copolymers containing nitrile groups based on ethylenically unsaturated monomers are prepared by reacting the copolymers on which they are based with ammonia at temperatures of from 150.degree. to 270.degree. C. and pressures from 30 to 350 bar in the presence of an aliphatic nitrile and/or dinitrile.

Process for the preparation of copolymers containing nitrile groups

By-products from the chlorination of butadiene may be reacted with phenols in the presence of iron catalysts to form Novolak type phenol resins.

Process for the preparation of phenol resins using by-products of the

Phenolic resins obtainable by Friedel-Crafts alkylation of phenols with polyfunctional compounds are eminently suitable as a reinforcing resin for rubber vulcanizates.

Use of certain phenolic resins for reinforcing rubber vulcanizates

Secondary products formed in the chlorination of butadiene can be reacted with phenols in the absence of iron catalysts to form novolak-like phenolic resins in such a way that the tetrachlorobutane present in the secondary products does not react. It can be distilled off with the excess phenol and isolated in pure form from the distillate obtained.

Process for the isolation of tetrachlorobutane and for the production of

The present invention is directed to novel surface active copolymers and the use thereof in the production of polyurethane powders. More particularly, the copolymers comprise have a substantially linear structure and are obtained by copolymerization of

Surface-active copolymers and their use for the production of

The present invention is directed to an improved process for the direct preparation of polyurethane powders in a finely divided form by the reaction of polyisocyanates and isocyanate reactive compounds in a carrier phase, using interface active compounds, the improvement wherein the interface active compound used consists of at least one polymer of a urethane of (i) a long chain alkyl isocyanate and (ii) a hydroxyalkyl-acrylic or -metacrylic acid ester.

Process for the preparation of polyurethane powders

The present invention relates to a process for the preparation of aromatic polycarbonates from diphenols by the phase boundary process, which is characterized in that cyclic, preferably monocyclic or bicyclic, aza compounds are used as catalysts. The present invention also relates to the polycarbonates obtainable according to the process, which are distinguished by high light transmission and a low tendency to yellowing, even after relatively severe exposure to heat.

Process for the preparation of polycarbonates catalyzed by cyclic aza

A process for the production of polyamide-6 or corresponding copolyamides by hydrolytic polymerization wherein the low molecular weight secondary reaction products and the unreacted .epsilon.-caprolactam are separated off from the polyamide melt and directly condensed on the .epsilon.-caprolactam melt to be polymerized.

Continuous process for the hydrolytic production of polycaprolactam

A method for the separate discharge of the individual phase streams of a multiple component flow comprising a high viscosity slow flowing liquid or suspension and a gas flowing at at least 100 times faster with the volumetric ratio of the gas to the liquid being greater than 1:1. The multicomponent flow is transversely fed through an inlet and directly into a rotating helical channel for conveying liquid in one direction. The channel has a liquid outlet spaced from the inlet in the one direction and a gas outlet spaced from the inlet in the opposite direction. A gas shut-off is formed between the inlet and the liquid outlet so as to effect the discharge of gas through the gas outlet in the opposite direction during the conveying of the liquid by the helical channel to the liquid outlet in the one direction.

Method for the separate discharge of the individual phase streams of a

The subject disclosure is concerned with a process for synthesizing soluble thermoplastic graft polymers of polycarbonate and ethylenically unsaturated monomers by polymerizing these monomers and aromatic polycarbonates carrying addition polymerizable end groups in a dilute solution of no more than 30 wt. % of reactants based on the weight of solution. The graft polymers so obtained are also encompassed by the inventive concept.

Graft polycarbonates, their preparation and their use as moldings

The subject of the instant invention are polycarbonates based on diphenols of the formula I ##STR1## wherein Y is a single bond, an elkylene- or alkylidene-radical with 1 to 7 carbon atoms, a cycloalkylene- or cycloalkylidene-radical with 5 to 12 carbon atoms, ##STR2## which have weight average molecular weights (M.sub.LS) measured by light scattering of at least 15 000 and which are characterized in having an average of zero to 1.5 mols, preferably 0.3 to 1.0 mols and especially 0.3 to 0.8 mols endgroups per mol polycarbonate. The subject of instant invention is also a process for preparing these polycarbonates according to the interfacial polycondensation method, the polycarbonates thus obtained and the use of the polycarbonates according instant invention for the preparation of compounds and films.

Macrocyclic polycarbonates

Phosphoric acid esters are produced by the method of phase-interface condensation by reacting phosphorus oxyhalides, phosphorus pentahalides, phosphoric acid monoester dihalides or phosphoric acid diester halides with hydroxyaryl compounds in the presence of aqueous alkaline earth metal and/or alkali metal hydroxide solutions and organic water-immiscible solvents.

Process for the production of neutral phosphoric acid esters

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Krefeld, Germany

Hugo Vernaleken