Hoechst Aktiengesellschaft

Basf Se Corporation

Ticona Gmbh

Celanese Ventures Gmbh

Hoechst Research & Technology Deutschland Gmbh & Co. Kg

Aventis Research & Technologies Gmbh & Co Kg

Axiva Gmbh

Hoescht Research & Technology Deutschland Gmbh & Co. Kg

Basf Fuel Cell Gmbh

Arnold Schneller

Gitte B&ouml;hm

Theodor Papenfuhs

Rainer Dyllick-Brenzinger

J&uuml;rgen Grande

Frank Osan

Michael Haubs

Helmut B Witteler

Joachim Clauss

Freddy Helmer-Metzmann

Holger Bengs

Helmut Ritter

Axel Wilms

Gad Kory

Stefan Schwiegk

Christian Schmidt

Achim Stammer

Volker Rauschenberger

Florian Richter

Otto Herrmann-Schonherr

Klaus Kurz

Hans-Rolf Dubal

Michael Hoffmockel

Mikio Murakami

Jürgen Lingnau

Harald Cherdron

Motonori Yamamoto

Willi Kreuder

Andreas Schleicher

Michael-Joachim Brekner

Walter Herwig

Georg Frank

Michael Heine

Ulrich Geissler

Kathrin Michl

Peter Preishuber-Pfluegl

Reinhard Wagener

Heinrich Sack

Hartmut Fischer

Rajan Hollmann

Markus Braun

Helmut Witteler

Silke Schuth

Ralf Thorwirth

Roland Nolte

Konstantin Ledjeff

Kurt Erbes

Werner H Muller

Juergen Sander

Freddy Gruber

Ulrich Epple

Bryan Cooper

Silke Biedasek

Gregor Deckers

Harald B&ouml;nsel

Jürgen Deininger

Joachim Hackenbruch

Ning Zhu

Matthias Scheibitz

Isa Alexandra Queiroz Da Fonseca

Weol Kyu Jeong

Kurt Witan

Andreas Lucke

Alfred Braunagel

Otto Hermann-Schonherr

Frank Bohme

Doris Pospiech

Frank Niedermaier

Gabriele Lambert

Hansotto Drotloff

Anette Brunner

Christine Kostler

Petra Mertesdorf

Ju Sander

Bernd Hackel

Ralf Schulze

Mike R&ouml;mmler

Dennis Kappler

Francesca Aulenta

Harald Bonsel

Mike Rommler

Francessa Aulenta

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 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

The present relates to nylon-5,10 molding compositions comprising The present invention moreover relates to a process for the preparation of these molding compositions, to the use of these molding compositions for the production of moldings of any type, and to the resultant moldings, preferably motor vehicle bodywork parts or electronics components of any type, foils, and fibers.

Fiber-reinforced polyamide[5,10] molding compounds

The invention relates to a method for isolating polyhydroxyalkanoates from production cells which comprises

Method for isolating polyhydroxyl alkanoates

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

The present invention relates to a method for preparing smooth-surface spherical microparticles which are completely or partially made of at least one water-insoluble linear polysaccharide. This method involves dissolving the at least one water-insoluble linear polysaccharide in a solvent or a mixture of solvents, introducing the solution into a precipitation agent or a mixture of precipitation agents, optionally cooling the mixture thus obtained, and separating the microparticles thus formed. The precipitation agent used consists of at least one water-soluble cellulose derivative. This invention also relates to microparticles obtained according to this method.

Method for preparing smooth-surface spherical microparticles completely or partially made of at least one water-insoluble linear polysaccharide and microparticles produced according to this method

Microparticles with a uniform spherical shape and a very narrow size distribution are described. They consist wholly or partly of a linear water-insoluble polysaccharide, preferably of 1,4-&agr;-D-polyglucan, and may contain other, in particular biodegradable, polymers and/or active substances. They are suitable inter alia for the controlled delivery of active substances. They are prepared by dissolving 1,4-&agr;-D-polyglucan or the polysaccharide in a solvent, introducing the solution into a precipitant, cooling the mixture and removing the particles formed.

Spherical microparticles containing linear polysaccharides

The invention relates to a controlled release tablet which in part or as a whole contains water-insoluble linear polysaccharides, preferably the polysaccharide poly(1,4-&agr;-D-glucan), in the form of microparticles, as retardation material. The tablet is also capable of controllably releasing an active agent.

Slow release tablet prepared from linear water-insoluble polysacchrides

The present invention relates to a topical preparation containing spherical microparticles as the essential component, wherein the microparticles comprise water-insoluble linear polyglucan.

Cosmetic or medical preparation for topical use

Homogeneous mixtures are described and can be processed to give shaped biodegradable and physiologically nonhazardous articles, such as packagings for food or drink or pharmaceutical products, sausage casings and the like. The mixtures comprise dialdehyde starch with a degree of oxidation of greater than 30%, starch which does not exhibit any iodine-starch reaction, and/or modified starch, water and other plasticizers, and also, if desired, other biopolymers and additives.

Thermoplastic mixtures containing dialdehyde starch and natural polymers

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Seeheim-Jugenheim, Germany

Arnold Schneller