Basf Se Corporation

Basell Polyolefine Gmbh

Basf Aktiengesellschaft

Basell Polypropylen Gmbh

Volker Rauschenberger

Dieter Lilge

Roland Hingmann

Axel Wilms

Stefan Schwiegk

Günther Schweier

Franz Langhauser

Arnold Schneller

Achim Stammer

Joachim Clauss

Gad Kory

Christian Schmidt

Rainer Karer

Peter Bauer

Martin Schneider

Meinolf Kersting

Martin Lux

Ingolf Hennig

Philipp Rosendorfer

Joachim Wulff-Döring

Florian Richter

Werner Schöne

David Appleyard

Murray Horton

Florian Stricker

Dieter Horn

Helmut Auweter

G&uuml;nther Schweier

Wolfgang Bidell

Michael Siemer

Frank Hermanutz

Heinrich Sack

Heribert Bohn

Dirk Gerhard

Herbert Haberkorn

Silke Biedasek

Isa Alexandra Queiroz Da Fonseca

Giovanni D'Andola

Ning Zhu

Jürgen Suhm

Frank Niedermaier

Erik Luddecke

Frank Gaehr

Julien Courtois

J&uuml;rgen Suhm

Bernd Hackel

Ronald Frans Maria Lange

The invention relates to a process for continuously preparing polyamide oligomers. This comprises continuous conveying of an aqueous solution of polyamide-forming monomers from a reservoir vessel into an oligomerization reactor, heating of the aqueous solution beyond a dissolution or storage temperature, the residence time of the monomer solution in the oligomerization reactor being limited and the pressure or the partial vapor pressure of the water being adjusted such that a conversion of monomers to polyamide oligomers does not exceed a maximum value and/or the polyamide oligomers formed do not phase-separate or spontaneously crystallize in solid form, and continuous discharge of the polyamide oligomers from the oligomerization reactor. A polyamide oligomer preparable by this process can be provided continuously in a mixture with water in a process for preparing a semicrystalline or amorphous, thermoplastically processible polyamide and then postcondensed to give a polyamide. This polyamide can be used for production of moldings by means of injection molding, multicomponent injection molding, injection molding/welding, extrusion, coextrusion, blow molding or thermoforming.

Method for continuously producing polyamide oligomers and producing semicrystalline or amorphous polyamides that can be thermoplastically processed

The present invention relates to a process for the preparation of an aliphatic or partially aromatic polyamide, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and increased pressure, the reaction mixture is optionally subjected to a first decompression to reduce the water content, the (optionally decompressed) reaction mixture is heated within a short time to a temperature above the melting temperature of the polyamides and the heated reaction mixture is subjected to a (further) decompression to reduce the water content and to an after-polymerization.

Process for the continuous preparation of an aliphatic or partially aromatic polyamide

The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide, in which a polyamide prepolymer is subjected to a solid state polymerization.

Method for producing aliphatic or partially aromatic polyamides, said method comprising a solid-phase polymerization process

A process for producing porous structures from polyamide by dissolving the polyamide in an ionic liquid and precipitating or coagulating the dissolved polyamide by contacting the solution with a liquid precipitant medium. Fibers are produced from the dissolved polyamide in a wet-spinning process by precipitation in protic solvents, in particular water, a C1-4-alkanol or mixtures thereof, and subsequent freeze-drying. Foils, films or coatings are produced by blade coating the dissolved polyamide onto a substrate surface, optionally spraying with protic solvent, in particular water, a C1-4-alcohol or mixtures thereof, dipping into a precipitation or coagulation bath, freeze-drying of the resulting foil, of the film or of the coated substrate. Molded parts are prepared by extracting the dissolved polyamide with protic solvents, preferably water, a C1-4-alcohol or mixtures thereof, wherein the dissolved polymer is transformed to a solid or wax-like state by cooling and extracted after subsequent molding.

Method for producing porous structures from synthetic polymers

The present invention relates to a semicrystalline propylene polymer composition prepared by polymerizing propylene, ethylene and/or C-C-1-alkenes, where at least 50 mol % of the monomer units present stem from the polymerization of propylene and at least 20% by weight of the propylene polymer composition is the result of a polymerization using metallocene catalysts,

Semicrystalline propylene polymer composition for producing biaxially stretched polypropylene films

Novel supported, titanized chromium catalysts for the homopolymerization of ethylene and the copolymerization of ethylene with &#x3b1;-olefins, a process for preparing them and to their use for the polymerization of olefins.

Supported, titanized chromium catalyst and its use for preparing homopolymers and copolymers of ethylene

Random copolymers of propylene with other 1-alkenes having up to carbon atoms,

Random propylene copolymers

Novel supported, titanized chromium catalysts can be used for the homopolymerization of ethylene and the copolymerization of ethylene with &#x3b1;-olefins.

Suspended chrome catalyst containing titanium and the use thereof for producing ethylene homopolymers and copolymers

A semicrystalline propylene polymer composition with good suitability for producing biaxially oriented films and prepared by polymerizing propylene, ethylene and/or C -C -1-alkenes, where at least 50 mol % of the monomer units present arise from the polymerization of propylene. Also described is the use of the semicrystalline propylene polymer composition for producing films, fibers or moldings, the films, fibers and moldings made from these compositions, biaxially stretched films made from the semicrystalline propylene polymer compositions, and also a method for characterizing the semicrystalline propylene polymer compositions.

Semicrystalline propylene polymer compositions with good suitability for producing biaxially oriented films

Carotenoid preparations in the form of coldwater-dispersible powders are produced by

Production of carotenoid preparations in the form of

Growing community of inventors

Eisenberg, Germany

Volker Rauschenberger