Deutsche Institute Fur Textilund Faserforschung Denkendorf

Basf Se Corporation

Technikum Laubholz Gmbh

Basf Aktiengesellschaft

Kelheim Fibres Gmbh

Centrotherm International Ag

Rhodia S.a.

Rhodianyl S.n.c.

Basf Aktiengeselleschaft

Solvay Specialty Polymers USA, LLC

Fuchshuber Techno-Tex Gmbh

Frank Hermanutz

Falko Abels

Tomasz Cwik

Klemens Massonne

Martin Merger

Matthias Maase

Franz Effenberger

Michael Lutz

Axel Wilms

Mark G Reichmann

Michael R Buchmeiser

Frank Gaehr

Michael Siemer

Eric Uerdingen

Wilhelm Oppermann

Veit Stegmann

Volker Rauschenberger

Stefan Schwiegk

Walter Roggenstein

Joachim Ruch

Dirk Gerhard

Sunghee Son

Peter Hirt

Oliver Oess

Ronald Beyer

Giovanni D'Andola

Johannes David Hoecker

Thomas Wisniewski

Marcel Brill

Gunter Fauth

Andreas Keller

Frank Gähr

Julien Courtois

Mirko Peczyoski

Erik Frank

Volker Bauch

Tanja Schneck

Manuel Clauss

Michael Schweizer

Johanna Sporl

Ronald Frans Maria Lange

Philipp Wimmer

Johanna Spoerl

Joerg Unold

Jörg Vois

Johanna SPÖRL

Andreas Fritz

A process for stabilizing precursor fibers for the production of carbon fibers is disclosed. The process comprises the following steps: continuously introducing, passing and removing said precursor fibers into, through and from a process chamber; establishing a predetermined process gas atmosphere different in composition from ambient air in said at least one process chamber, said process gas atmosphere containing at least one of a reactive component and a catalyst having a predetermined partial pressure; while said precursor fibers are in said process chamber, heating the precursor fibers to at least a first temperature and maintaining said first temperature for a predetermined period of time.

Method and device for stabilizing precursor fibers or films for producing carbon fibers or films

The invention relates to a process for the production of polymer fibers from polymers dissolved in ionic liquids by means of an air gap spinning process, characterized in that a) a spinning solution that contains an ionic liquid and a dissolved polymer is produced; b) said spinning solution is guided through an extruder before it is divided into fibers via a die; and c) the obtained fibers are guided via an air gap through a coagulation bath.

Process for the preparation of polymer fibers from polymers dissolved in ionic liquids by means of an air gap spinning process

The invention relates to a prestressed concrete body, containing prestressed filament yarns based on cellulose and/or cellulose derivatives. Advantageously, said prestressed concrete body is produced in that: 1.) filament yarns based on cellulose and/or derivatives thereof are clamped into a shaping container, 2.) the clamped filament yarns are wetted with water to make them swell, 3.) a prestress of approximately 0.5 to 10.0 kg/4000 dtex is applied to the wetted filament yarns, 4.) liquid concrete is poured into the shaping container containing the prestressed filament yarns, 5.) the liquid concrete in the shaping container is cured to form precast concrete, maintaining the specified applied prestress. Useful application possibilities are opened up by the invention. Use as components or structural elements with low brittleness and/or high resistance to corrosion, especially in bridge building, especially in bridge girders, in constructing containers, in constructing high-rise structures, in the production of hollow floors or ceilings, hollow core planks, precast floors or ceilings and for recycling once the service life has passed by being ground into concrete granules is advantageous.

Prestressed concrete body, method for the production thereof, and use of same

The invention relates to a method of producing a carbon-ceramic shaped body comprising a carbon fibre-reinforced carbon matrix and a content of silicon carbide and silicon, characterised in that a carbonisable shaped body having an organic matrix based on cellulose and reinforced with carbonisable textile structures has been carbonised to form a porous shaped body and the porous carbonised shaped body is then subjected to a liquid silicisation to give the carbon-ceramic shaped body. This method is performable in an economically advantageously manner without losing the beneficial properties achievable according to the prior art.

Method of producing a carbon-ceramic shaped body with an open porosity of from 15 to 60%

The present invention relates to a regenerated cellulose fiber which contains a hydrophobic substance selected from the group consisting of alkyl ketene dimers, alkenyl ketene dimers, alkyl succinic anhydrides, alkenyl succinic anhydrides, alkyl glutaric acid anhydrides, alkenyl glutaric acid anhydrides, alkyl isocyanates, alkenyl isocyanates, fatty acid anhydrides as well as mixtures thereof incorporated in the cellulose matrix.

Regenerated cellulose fiber

The invention relates to a process for producing carbon fibers from cellulosic fibers, characterized in that cellulosic fibers, which contain a sulfonic acid salt of formula (I), wherein Rrepresents a hydrocarbon group and Krepresents a cation, are converted into carbon fibers.

Method for producing carbon fibers from cellulose fibers treated with sulfonic acid salts

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 invention relates to a method for producing regenerated biopolymers in the form of carbohydrates, using a solvent system that contains the biopolymers dissolved therein. The solvent system is based on a melted ionic liquid and optionally a protic solvent or a mixture thereof. The biopolymers dissolved in the solvent system are precipitated in a coagulation medium, said medium comprising a protic coagulant or a mixture of protic coagulants. The method according to the invention is characterized in that the surface tension &#x3c3; of the coagulant or the mixture of coagulants is 99% to 30% of the surface tension &#x3c3; of water, the surface tension being measured according to ASTM D 1590-60 at a temperature of 50&#xb0; C. The method according to the invention is economical and flexible and leads to advantageous products, especially in the form of staple fibers which are especially not fibrillated and have an advantageous wet to dry strength ratio.

Method for producing regenerated biopolymers and regenerated products obtained by said method

A solution system for biopolymers in the form of carbohydrates based on a molten ionic liquid, additives optionally being contained in the solution system, is described. This solution system contains a protic solvent or a mixture of several protic solvents, and in the case where the protic solvent is solely water, this is present in the solution system in an amount of more than about 5 wt. %. Carbohydrates can be incorporated into the solution system, in particular in the form of starch, cellulose and derivatives thereof, and it can then be used for regeneration of the carbohydrates contained therein. A particularly advantageous process for the preparation of the solution system containing the carbohydrates and for the preparation of regenerated carbohydrates, in particular in the form of regenerated cellulose fibers, is moreover described. The invention accordingly also provides such spun fibers as are distinguished in that they are non-fibrillating. The invention offers in particular economic advantages over the systems of the prior art.

Method of forming regenerated carbohydrates with solvent systems based on molten ionic liquids

The invention relates to a method for reducing the caprolactam content of polyamide 6 obtained especially by hydrolytic polymerization of epsilon-caprolactam. The method is characterized by the use of an additive that forms isocyanuric acid under the influence of heat. The additive or the isocyanuric acid produced externally under the influence of heat is added (a) to the polymerization or (b) to a melt of polyamide 6. This enables the caprolactam content of the polyamide 6 to be reduced considerably compared to that of usual commercial polyamide 6. In particular, the resulting polyamide 6 shows good characteristics for reprocessing e.g. into fiber and molding masses by melt extension.

Method for reducing the caprolactam content of polyamide 6, a polyamide 6 and use thereof

Method for producing polyurethane elastomer fibers and fibers produced according to this method

The invention concerns a polyurethane elastomer containing structural units of type (a), in which: the group &mdash;O&mdash;R &mdash;O&mdash;is a macrodiol group with a molecular weight of approximately 500 to 10000, R is a bivalent aliphatic, cycloaliphatic and/or aliphatic-cycloaliphatic group; and X is a short-chain olefinically unsaturated group, Y is NH or O, n is an integer from 1 to 10 and m is an integer of at least 4. The invention also concerns a method of preparing this polyurethane elastomer which can be melt-spun to form fibres or melt-extruded to form foils. The fibres or foils can be exposed to energy-rich radiation such that crosslinking of the polyurethane occurs. Fibres according to the invention display superior properties in terms of textile-mechanical properties, in particular good tensile strength, elongation at tear, residual elongation and heat distortion temperature.

Polyurethane elastomers, method of producing them and their use

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Leonberg, Germany

Frank Hermanutz