Basf Aktiengesellschaft

Basf Se Corporation

Ineos Styrolution Group Gmbh

Klaus-Dieter Hungenberg

Juergen Kerth

Meinolf Kersting

Norbert Niessner

Harald Schwager

Peter Koelle

Patrik Mueller

Wolfgang Fischer

Achim Stammer

Bernd Hisgen

Brian J Banaszak

Roland Walker

Ralf Zolk

Jun Gao

SangJun Ahn

Rueger Schlund

Ula El-Jaby

Klaus Hahn

Ekkehard Jahns

Harald Keller

Juergen Schmidt-Thuemmes

Bernhard Czauderna

Bernhard Schmied

Jurgen Kerth

Jan Holoch

Norbert Güntherberg

Stephan H&uuml;ffer

Olaf Kriha

Wolfram Husemann

Michael Breulmann

Birgit Reinhard

Michel Pepers

Pascal Hesse

Eckhard Neufeld

Christian Lach

Thomas Frechen

Sabine Oepen

Wil Duijzings

Andreas Pfau

Thilo Krebs

Peter Kolle

Werner Schoene

Ingolf K&uuml;hn

Bernd Diebold

Peter Dillmann

Renata Jovanovic

Wolfgang Kasten

Wolfgang Ferstl

Guenther Schweter

Klaus Dieter Ruempler

Rudolf Süttinger

Ping Zhang

Xiang-Ming Kong

Sangjun Ahn

The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent () and a second reagent () of the thermoplastic moulding compounds are fed to a loop conduit () which comprises a static mixer (), wherein the reagents () are pressed in loops through the loop conduit () and passing the static mixer (), whereby the reagents () are dispersed to form a dispersion () in the static mixer (). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.

Process for the production of thermoplastic moulding compounds

The invention relates to a process for the production of thermoplastic moulding compounds, in particular ABS, wherein at least a first reagent () and a second reagent () of the thermoplastic moulding compounds are fed to a gear pump () which comprises a housing and at least a first gear wheel that is rotatable relative to the housing about a first axis, and a second gear wheel that is rotatable relative to the housing about a second axis, wherein a loop conduit () is provided, and wherein the reagents () are pressed in a loop through the loop conduit () and passing the gear wheels, whereby the reagents () are dispersed to form a dispersion () in the gear pump (). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.

The invention provides a process for preparing expandable styrene polymers which comprises the steps of:

Preparing expandable styrene polymers

The present invention provides a novel one-step process for preparing an aqueous polymer dispersion by the free radical aqueous emulsion polymerization comprising mixing at least water, a dispersant, and an oil-soluble initiator; raising a temperature from the starting to the end reaction temperature while metering at least ethylenically unsaturated monomers and a water-soluble initiator into a reaction vessel, conducting polymerization of the monomers in the presence of the water-soluble initiator at a temperature up to the end reaction temperature, and when the temperature has reached the end reaction temperature, conducting polymerization by the oil-soluble initiator. The oil-soluble initiator is inactive at the starting reaction temperature and becomes more active as a temperature approaches the end reaction temperature at which the oil-soluble initiator is fully active.

Free-radical polymerization process producing aqueous polymer dispersion with low residual monomer content utilizing oil and water soluble initiators

A polybutadiene latex is prepared by a process in which butadiene is polymerized by free radical emulsion polymerization in the presence of initiator and, if required, dispersants and further conventional assistants, the polymerization being carried out in the presence of reactive comonomers in such a way that the heat flow of 43 watt/kg solids content of the polymerization mixture is not exceeded. Owing to the presence of reactive comonomers, the reaction rate at the beginning of the reaction is increased, with the result that an overall flatter heat flow profile is obtained. A preferred reactive comonomer is styrene. Preferably, the process is carried out by a semi-batch procedure in which

Method for producing polybutadiene latex with an optimized thermal current profile

The surfaces of apparatuses and apparatus parts for chemical plant construction, including, for example, apparatus, container and reactor walls, discharge apparatuses, fittings, pumps, filters, compressors, centrifuges, columns, heat exchangers, dryers, comminuting machines, internals, packings and mixing elements, are coated by a process wherein protuberances having a mean height of from 100 nm to 50 &mgr;m with a mean spacing of from 100 nm to 100 &mgr;m are produced on the surface to be coated and the coating is applied thereon by currentless deposition of a metal layer or of a metal-polymer dispersion layer with the aid of a plating bath which contains a metal electrolyte, a reducing agent and optionally a polymer or polymer blend to be deposited, in dispersed form.

Method for coating apparatuses and parts of apparatuses for the construction of chemical installations

Catalyst systems of the type comprising the Ziegler-Natta catalysts contain, as active components,

Catalyst systems of the type comprising the Ziegler-Natta catalysts

A novel process for the preparation of Ziegler-Natta catalyst systems containing, as active components,

Preparation of Ziegler-Natta catalyst systems

Catalyst systems of the Ziegler-Natta type contain, as active components

Ziegler-natta catalyst systems containing specific organosilicon

High-flow propylene/ethylene copolymers which have a melt flow index of from 2 to 200 g/min under a load of 2.16 kg at 230.degree. C. and which may be produced from the gas phase by polymerization in two stages in an agitated fixed bed in the presence of hydrogen acting as chain stoppage regulator and using a Ziegler-Natta catalyst system comprising a titaniferous solid component which contains a magnesium compound on finely divided silicon oxide or on finely divided aluminum oxide or on a finely divided aluminum silicate having the empirical formula SiO.sub.2.aAl.sub.2 O.sub.3, where a stands for a value between 0.001 and 2, and an aluminum component, by means of a procedure comprising a) a first polymerization stage in which propylene is polymerized under a pressure of from 20 to 40 bar and at a temperature of from 60.degree. to 90.degree. C., the ratio of the partial pressure of the hydrogen to that of the propylene being adjusted to from 1:100 to 10:100, followed by b) a second polymerization stage, which consists in the polymerization, at a temperature of from 40.degree. to 100.degree. C., of a mixture of propylene and ethylene and the addition thereof, in the form of polymerized units, to the polypropylene produced in the first polymerization stage, the pressure in this second polymerization stage being from 10 to 30 bar and at least 7 bar lower than that used in the first polymerization stage, while the ratio of the partial pressure of the hydrogen to that of the propylene is adjusted to from 2:100 to 12:100 and the ratio of the weight of monomer converted in the first stage to that of monomer converted in the second stage is kept within the range of 1:1 to 20:1.

Process for the production of high-flow propylene/ethylene copolymers

Propylene polymers have a molecular weight ratio Q (M.sub.w /M.sub.n) of from 6 to 30 and are obtainable by Ziegler-Natta polymerization in the presence of hydrogen as molecular weight regulator and are particularly suitable for the production of films and moldings.

Propylene polymers having a broad molecular weight ratio Q

High-flow blend of different propylene polymers

Deactivated and reactivated metallocene catalyst systems

Propylene-ethylene copolymers are obtained by two-stage polymerization from the gaseous phase in an agitated fixed bed by means of a Ziegler-Natta catalyst system that contains in addition to a titanium-containing solid component also an aluminum compound as co-catalyst, wherein as Ziegler-Natta catalyst system a system is used which, following the reaction of the titanium-containing solid component with the co-catalyst, is deactivated by reaction with carbon dioxide. The copolymers are used for producing fibers, films and moldings.

Preparation of propylene-ethylene copolymers

Ziegler-Natta-type catalyst systems containing, as active constituents,

Ziegler-natta catalyst systems containing organometallic compounds

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Birkenau, Germany

Klaus-Dieter Hungenberg