Basf Se Corporation

Ticona Gmbh

Hoescht Research & Technology Deutschland Gmbh & Co. Kg

Aventis R Search & Technology Gmbh & Co. Kg

Metabolix, Inc.

Basf Fuel Cell Gmbh

Joachim Clauss

Bernd Bruchmann

Philippe Desbois

Arnold Schneller

Gad Kory

Achim Stammer

Stefan Schwiegk

Christian Schmidt

Ning Zhu

Florian Richter

Monika Haberecht

Michael Haubs

Helmut B Witteler

Andreas Landes

Axel Wilms

Volker Rauschenberger

Silke Biedasek

Klaus Kurz

Michael Hoffmockel

Georg Frank

Faissal-Ali El-Toufaili

Michael Ishaque

Holger Türk

Jürgen Lingnau

Heinrich Sack

Daniel Schönfelder

Hiroe Yamada

Gregor Deckers

Michael Heine

Neil George

Angelika Maria Steinbrecher

Thomas Soczka-Guth

Andreas Wollny

Joachim Maier

Uwe Witt

Klaus-Dieter Kreuer

Harald B&ouml;nsel

Dirk Voeste

Isa Alexandra Queiroz Da Fonseca

Rafel Israels

Ulrike Troppmann

Helmut Witteler

Kurt Witan

Christian Sowa

Marta Martin-Portugues

Frank Niedermaier

Annette Fuchs

Christine Kostler

Mike R&ouml;mmler

Chee Chin Liew

Bernd Hackel

Doris Stephan

Daniel Schoenfelder

Harald Bonsel

Mike Rommler

Jeremy Keith Sanders

Brian Keith Hunter

Daniel Mark Horowitz

Daniel SCHÖNFELDER

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 method for producing semi-aromatic copolyamides with a high diamine excess in the reaction batch.

Method for producing semi-aromatic copolyamides with a high diamine excess

The invention provides a composition comprising an active ingredient with a maximum solubility in water at 20&#xb0; C. of 10 g/l, and a hyperbranched polyester based on a hydrophobic dicarboxylic acid and a trifunctional alcohol. The invention further relates to the hyperbranched polyester mentioned, to a process for preparation thereof and to the use thereof for solubilizing an active ingredient with a maximum solubility in water at 20&#xb0; C. of 10 g/l in aqueous solutions.

Hyperbranched polyester with a hydrophobic nucleus for solubilizing poorly soluble active substances

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 invention relates to a device for synthesis of a polymer under separation of a gaseous substance. Said device comprises a reaction chamber (), which has a top section (), a middle section () and a bottom section (), an inlet opening () which is arranged in the middle section (), a first outlet opening () which is arranged in the bottom section (), a second outlet opening () which is arranged in the top section (), a first return opening (), which is arranged in the bottom section (), a second outlet opening (), which is arranged under the top section (), a distribution device (), which is arranged between the top section () and the middle section (), and a removal device () which is arranged to be movable along the top section (). The invention further relates to a method for synthesis of a polymer which can be carried out in said device.

Device and method for synthesis of a polymer under separation of a gaseous substance

The invention relates to a device for synthesizing a polymer accompanied by separating a gaseous substance. Said device comprises: a reactor chamber () having a substantially circular cylinder-shaped upper section (), which is delimited by two circular surfaces () and a circumferential surface () and has a longitudinal cylinder axis, and a lower section (), the upper section () and the lower section () being connected to one another via the first circular surface (); an inlet opening (); a first outlet opening (), which is arranged in a wall of the lower section (); a second outlet opening (), which is arranged in the second circular surface () or in the circumferential surface () between the inlet opening () and the second circular surface (); and a removal device (), which is arranged so as to be movable along the longitudinal cylinder axis at least between the second circular surface () and the inlet opening (), and contacts the circumferential surface (). The invention further relates to a method comprising: feeding an oligomer melt () into a circular cylinder-shaped first section () of a reaction chamber () through an inlet opening () tangentially to a circumferential surface () of the first section (); polymerizing the oligomer melt () to form a polymer melt (); removing the polymer melt () from the reaction chamber () through a first outlet opening () of the reaction chamber (); and removing a gaseous substance () from the reaction chamber () through a second outlet opening () of the reaction chamber () above the inlet opening (). Deposits on at least one inner wall of the first section () of the reaction chamber () above the inlet opening () are removed by a removal device ().

Device for synthesizing a polymer with reduced formation of deposits in the reaction chamber

The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide oligomer, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and elevated pressure and the oligomerization output is preferably subjected to an expansion.

Method for the continuous production of an aliphatic or semi-aromatic polyamide oligomer

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

An apparatus for synthesis of a polymer with separation of a gaseous substance comprises a reaction space having an essentially circular cylindrical upper section which is bounded by two circular faces and one shell face and has a longitudinal cylinder axis, and a lower section, an inlet orifice disposed in a circular face or the shell face of the upper section, a first outlet orifice disposed in a wall of the lower section, a second outlet orifice disposed in the shell face of the upper section opposite the first outlet orifice, and a removal device which is disposed so as to be rotatable about the longitudinal cylinder axis and is in contact with both circular faces and the shell face. This apparatus can especially be used for performance of a process including the feeding of an oligomer melt into a reaction space through an inlet orifice, the polymerization of the oligomer melt to give a polymer melt, the removal of the polymer melt from the reaction space through a first outlet orifice of the reaction space, and the removal of a gaseous substance from the reaction space through a second outlet orifice of the reaction space, wherein deposits on at least one inner wall of the reaction space are removed by a removal device and transported into the oligomer melt.

Device for the synthesis of a polymer with extraction of a gaseous substance comprising a reaction chamber having at least one circular-cylindrical section

The present invention provides a composition comprising an active ingredient with a maximum solubility in water at 20&#xb0; C. of 10 g/l, and a hyperbranched polyester which is joined to a polar polymer which comprises a polycondensate or a polymer comprising ethylenically unsaturated monomers. The invention further relates to the hyperbranched polyester mentioned and to a process for preparation thereof. It further relates to the use of the hyperbranched polyester for solubilizing the active ingredient in aqueous compositions.

Hyperbranched polyester having a hydrophobic core for solubilizing active ingredients of low solubility

The present invention relates to quick-drying two-component polyurethane coating compositions, to processes for preparing them, and to their use.

Quick-drying coating compounds

A process and an apparatus are described for preparation of oxymethylene polymers. This process encompasses polymerization, in a homogeneous phase, of a monomer which forms oxymethylene groups, as far as 90% of maximum conversion in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by deactivation of the reaction mixture. The resultant oxymethylene polymers have alkyl ether end groups and are extremely stable.

Process for preparation of oxymethylene polymers in a homogeneous phase, and use

A process is described for preparation of oxymethylene homo- and copolymers. This encompasses heterogeneous polymerization of a monomer which forms oxymethylene groups in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by the deactivation of the polymer in a homogeneous phase via treatment with a basic aprotic solvent or with an aprotic solvent which comprises a base. Oxymethylene homopolymers with very high stability are also described.

Process for preparation of oxymethylene polymers, selected polymers, and their use

Laser-markable molding compositions, molding produced therewith and method of marking the same, wherein the molding compositions comprise: (a) at least one semicrystalline thermoplastic; and (b) at least one particulate additive selected from the group consisting of (i) light-sensitive salt compounds, (ii) inorganic oxides having an average particle diameter of less than 250 nm, and combinations thereof; wherein the light-sensitive salt compounds comprise compounds having two or more captions, wherein at least one of the two or more captions is selected from the group consisting of Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ag, Sn, Sb, La, Pr, Ta, W, and Ce; and wherein at least another of the two or more captions is selected from the group consisting of elements of periods 3-6 of main groups II and III, elements of periods 5-6 of main group IV, elements of periods 4-5 of transition groups III-VIII, and the lanthanoids.

Laser-markable molding compositions, moldings prepared using the same and methods of marking such moldings

The present invention relates to novel molding compositions based on semicrystalline engineering thermoplastics which, in conventional processing techniques, give moldings with reduced surface gloss. A feature of the molding compositions is that they comprise, in a polymer matrix, if appropriate with the usual additives, polymer particles with a median size dof from 0.1 &#x3bc;m to 100 &#x3bc;m, and comprise at least one other incompatible or semicompatible polymer which has not been chemically crosslinked, and also, if appropriate, comprise salt-like additives. The invention further relates to moldings which are produced by means of conventional processing techniques, in particular via injection molding, from these matt-effect molding compositions.

Thermoplastic partially crystalline molding compound having a reduced surface luster and products made therefrom

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Darmstadt, Germany

Joachim Clauss