Covestro Deutschland Ag

Bayer Materialscience Ag

Bayer Aktiengesellschaft

Bayer Intellectual Property Gmbh

Bundesdruckerei Gmbh

Covestro Intellectual Property Gmbh & Co. Kg

Jörg Büchner

Dirk Achten

Otto Ganster

Wolfgang Fischer

Klaus Konig

Hans-Josef Laas

Harald Blum

Heinz Pudleiner

Christoph Gürtler

Thomas Fäcke

Harald Kraus

Walter Meckel

Klaus Meyer

Martin Melchiors

Roland Wagner

Thomas Büsgen

Nicolas Degiorgio

Wolfgang Arndt

Pantea Nazaran

Heinz-Werner Lucas

Sebastian Dörr

Wolfgang Henning

Michael Ludewig

Dirk Dijkstra

Peter Reichert

Levent Akbas

Eduard Hansel

Joachim Wagner

Holger Mundstock

Gunter Arend

Matthias Wintermantel

Dirk Pophusen

Raul Pires

Michael Grahl

Bettina Mettmann

Evgeny Avtomonov

Jens Ehreke

Michael Knebel

Mehmet-Cengiz Yesildag

Jörg Tillack

Werner Jenninger

Fabian Schuster

Ting Liu

Cengiz Yesildag

Per Krüger

Takahiko Ohwada

Reinhard Löwe

Thomas Bernert

Andreas Nübler

Jonas Künzel

Ralf Rott

Reinhard LÖWE

A process for manufacturing an article comprises the steps of: I) applying a filament of an at least partially fused construction material to a support so as to obtain a layer of the construction material which corresponds to a first selected cross-section of the article; II) applying a filament of the at least partially fused construction material to a previously applied layer of the construction material so as to obtain a further layer of the construction material which corresponds to a further selected cross-section of the article and which is bonded to the previously applied layer; and III) repeating step II) until the article is formed. At least steps II) and III) are carried out in a chamber and the construction material comprises a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of &#x2265;20&#xb0; C. to &#x2264;100&#xb0; C. The fusible polymer further has a complex viscosity |&#x3b7;*| (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100&#xb0; C. and a shear rate of l/s) of &#x2265;10 Pas to &#x2264;1000000 Pas. Finally, the temperature inside the chamber is &#x2264;50&#xb0; C. The invention also relates to an article manufactured by the process according to the invention, to an article having a substrate and to an article bonded to the substrate, the article being in the form of an adhesive joint or varnish region, and to the use of a particular polyurethane in fused deposition modeling-based additive manufacturing processes.

Fused deposition modeling-based additive manufacturing process at low temperatures

A process for manufacturing an article comprises the steps of: applying a layer that consists of particles to a target area; allowing, in a chamber, energy to act on a selected portion of the layer, according to a cross-section of the article, so that the particles in the selected portion are bonded, and repeating the steps of applying and allowing energy to act for a plurality of layers so that the bonded portions of the adjacent layers are bonded to form the article, at least part of the particles comprising a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of &#x2265;20&#xb0; C. to &#x2264;100&#xb0; C. The fusible polymer further has a complex viscosity \&#x3b7;*\ (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100&#xb0; C. and a shear rate of 1/s) of &#x2265;10 Pas to &#x2264;1000000 Pas. Finally, the temperature inside the chamber is &#x2264;50&#xb0; C. The invention also relates to an article manufactured by the process according to the invention, to an article having a substrate and to an article bonded to the substrate, the article being in the form of an adhesive joint or varnish region, and to the use of a particular polyurethane in powder-based additive manufacturing processes.

Powder-based additive manufacturing process at low temperatures

The present invention relates to aqueous dispersions containing hydrophilized polycarbodiimides, methods for producing the aqueous dispersions according to the invention, their use as a constituent of binders in adhesives, lacquers, paints, paper coating compounds or in fiber nonwovens and articles made of wood, metal, textile, leather or plastic, which are treated with the aqueous dispersion according to the invention.

Carbodiimidation method

Method for the production of adhesive-coated articles, articles obtainable thereby and their use A method for the production of adhesive-coated articles comprises the steps of: (I) providing a substrate; (II) applying a first polyurethane and/or polyurethane-polyurea polymer onto the substrate, the first polyurethane and/or polyurethane-polyurea polymer being capable of attaining an at least partially crystalline state with a final degree of crystallinity and wherein during and/or after the application the first polyurethane and/or polyurethane-polyurea polymer is present in a non-crystalline state. The method further comprises the steps: (III) applying onto the first polyurethane and/or polyurethane-polyurea polymer of step (II) a composition comprising a mixture of a second polyurethane and/or polyurethane-polyurea polymer and furthermore an acrylate polymer, wherein the application is performed while the degree of crystallinity of the first polyurethane-polyurea polymer is lower than its final degree of crystallinity; and (IV) cooling the article obtained to a temperature below the glass transition temperature of the acrylate polymer.

Method for the production of adhesive-coated articles, articles obtainable thereby and their use

The present invention relates to a process for overlaying a base substance with a multilayer decorative film in a vacuum forming, a multilayer decorative film for a secondary decoration used in such a vacuum forming process, to a multilayer decorative film excellent in adhesiveness, workability, and secondary physical properties such as heat resistance and hydrolysis resistance after forming and the use of such multilayer decorative film in a vacuum forming process.

Multilayer decorative film

The invention relates to an aqueous adhesive composition containing at least one acrylate polymer with a glass transition temperature Tg&#x3e;50&#xb0; C. and at least one amorphous polyurethane or polyurethane-polyurea polymer with a glass transition temperature Tg&#x3c;+10&#xb0; C., the use of the adhesive compositions for the manufacture of heat-activated adhesive layers, and planar formations containing adhesive layers based on the adhesive composition.

Linerless label

Latent-reactively glued TPU/PC layer materials

The present invention relates to aqueous compositions based on crystalline or semicrystalline polyurethane polymers, processes for the preparation thereof and adhesive systems comprising these aqueous compositions and the use thereof.

Aqueous formulations based on crystalline or semicrystalline polyurethane polymers

The present invention relates to a method for producing an electromechanical, for example piezoelectric, transducer in which a first polymer layer comprising cutouts is applied to a first continuous polymer layer by means of a printing and/or coating method, a cover is applied to the first polymer layer comprising cutouts in such a way that the cutouts of the first polymer layer comprising cutouts are closed off with the formation of cavities, and the cover is connected to the first polymer layer comprising cutouts. The invention also relates to electromechanical transducers produced by the method according to the invention, and the use of said electromechanical transducers.

Process for the producing of an electromechanical transducer

Preparations of surface-deactivated solid isocyanates which are dispersed in finely particulate manner, with aqueous isocyanate-reactive polymer dispersions that include

Adhesives

The invention relates to aqueous crosslinking polymer dispersions which are characterized in that they consist of

Aqueous crosslinking polymer dispersions and their use for the

The present invention relates to solvent-free two-component polyurethane adhesive systems with high initial strengths and low levels of migration derived from a select reactants comprising a hydroxyl polyester and an isocyanate containing prepolymer.

Solvent-free, two-component polyurethane adhesive systems

Disclosed herein is a transparent adhesive containing isocyanate groups based on at least one polyol and at least one polyisocyanate, characterized in that the adhesive contains urea groups.

Adhesives based on polyols and polyisocyanates

Growing community of inventors

Bergisch Gladbach, Germany

Jörg Büchner