Basf Aktiengesellschaft

Basf Se Corporation

Basfaktiengesellschaft

Basf Se (Ellwanger & Baier Patentanwälte)

Franz-Josef Dietzen

Klaus Hahn

Karl Kolter

Gunnar Schornick

Ulrike Licht

Gerd Ehrmann

Dietrich Scherzer

Christian Maletzko

Frank Braun

Gerhard Alicke

Isidor De Grave

Jan Holoch

Reinhold Weber

Markus Allmendinger

Joachim Ruch

Bernardo Wolff

Tim Diehlmann

Carsten Sandner

Martin Jochen Klatt

Isidoor De Grave

Hans D Zettler

Heinz Weber

Joachim Queisser

Uwe Keppeler

Guiscard Gl&uuml;ck

Bernhard Schmied

Martin Laun

Ingo Bellin

Jens Rieger

Manfred Weilbacher

Hans-Joachim H&auml;hnle

Joachim Fischer

Achim Datko

Gerhard Turznik

Eckhard Neufeld

Angelika Maschke

Eckhard Nintz

R&uuml;diger Funk

Peter Merkel

Hartmut Heinen

Swen Rück

Serguei Evsioukov

Thomas Kiciak

Julien N Callens

Alfons J Van Biesen

Manfred Hahn

Thorsten Schmeller

Herbert Schall

Maria-Kristin Sommer

Hanns-Jörg Krautschneider

Wolfgang Kratzmüller

Karlheinz Braun

Christoph Hahn

Andreas DAIß

Gregor Haverkemper

Christoph Oliver Hahn

Cathrin Schröder

Michael Gehde

The invention relates to a process for the production of at least two-layer thermoplastic sheets via thermal welding of at least one thinner thermoplastic sheet with density (D1) and of at least one second thinner thermoplastic sheet with density (D2), where the density (D1) of the first thinner thermoplastic sheet is smaller than the density (D2) of the second thinner thermoplastic sheet. The process introduces at least one first heating element and at least one second heating element along mutually offset planes between the two thinner thermoplastic sheets, where the surfaces of the thinner thermoplastic sheets do not touch the surfaces of the heating elements. The first heating element transfers a quantity of energy (E1) to the surface of the first thinner thermoplastic sheet, and the second heating element transfers a quantity of energy (E2) to the surface of the second thinner thermoplastic sheet, where the quantity of energy (E1) is smaller than the quantity of energy (E2).

Method for producing multi-layered thermoplastic plates by means of thermal welding of different plates

The present invention relates to a process for the production of at least two-layer thermoplastic foam sheets via thermal welding of at least two thinner thermoplastic foam sheets. In the process of the invention, at least two heating elements are conducted on mutually offset planes between the surfaces to be welded of the thinner thermoplastic foam sheets, and the foam sheets here do not touch the heating elements. The number of layers of the thermoplastic foam sheet is per se a result of the number of thinner thermoplastic foam sheets that are thermally welded to one another. If by way of example three thinner thermoplastic foam sheets are thermally welded to one another, a three-layer thermoplastic foam sheet is per se obtained, and if there are four thinner thermoplastic foam sheets the result is accordingly per se a four-layer thermoplastic foam sheet.

Method for producing thermoplastic foam panels by means of at least two heating elements offset in parallel with each other

Expandable pelletized styrene polymer materials with at least bi- or multimodal molecular weight distribution, to a process for their preparation, and to use for producing moldable-foam moldings.

Expandable polystyrene granulates with a bi- or multi-modal molecular-weight distribution

A process for the preparation of expandable styrene polymers having a molecular weight Mof greater than 170,000 g/mol, which comprises conveying a blowing agent-containing styrene polymer melt having a temperature of at least 120&#xb0; C. through a die plate with holes whose diameter at the die exit is at most 1.5 mm, and subsequently granulating the extrudate, and expandable styrene polymers (EPS) having a molecular weight Mof more than 170,000 g/mol with 0.05 to 1.5% by weight of internal water.

Method for producing expandable polystyrene

The present invention relates to an open-cell foam, and to a process for producing this open-cell foam by melting a thermoplastic, or a mixture comprising a thermo-plastic, giving a melt, mixing the melt with at least one blowing agent under pressure, and foaming the melt comprising the blowing agent via extrusion into the free atmosphere, the temperature of the melt during the foaming process being greater than the melt temperature at which a closed-cell foam is formed, and/or adding a pulverulent solid, and/or adding a foreign polymer. The present invention further relates to the use of the foam of the invention for sound deadening or for producing materials by sound deadening.

Open-cell foam composed of high-melting point plastics

The invention relates to a process for producing foam webs by foam extrusion of a mixture of a polysulfone or polyether sulfone and a volatile blowing agent, where the blowing agent is water or a mixture of water with an inert gas or organic liquid, e.g. an alcohol or a ketone.

Production of foam webs from high-temperature-resistant polysulfones or polyether sulfones

A process prepares expandable propylene polymer beads by mixing propylene polymer melt with a volatile organic blowing agent and with a nucleating agent in an extruder, whereupon the extrusion and pelletization of the extruded takes place in a water bath under conditions of temperature and pressure at which practically no foaming of the pellets takes place.

Preparation of expandable propylene polymer beads

Flexible open-celled microcellular foams based on thermoplastic polymers are useful for fluid-absorbent hygiene articles.

Flexible open-celled microcellular polymer foams

Open-cell moldable foams are based on a thermoplastic matrix which comprises A. from 99 to 50% by weight of a styrene polymer and B. from 1 to 50% by weight of a polymer of low compatibility with the styrene polymer.

Open-cell particulate foams

The invention relates to expandable olefin bead polymers which comprise a blowing agent with a boiling point of from &minus;5 to 150&deg; C., selected from the group consisting of alkanes, alkanols, ketones, ethers and esters. The particles are unfoamed and have a bulk density above 500 g/l, and can be foamed to a bulk density below 200 g/l after storage for one hour at room temperature in free contact with the atmosphere. They are prepared by impregnating polyolefin pellets in suspension in a pressure vessel with the blowing agent, cooling the batch below 100&deg; C., reducing the pressure and isolating the particles.

Expandable olefin bead polymers

A process for preparing expandable particulate styrene polymers wherein from 5 to 50% by weight of expanded graphite and also, if desired, from 2 to 20% by weight of a phosphorus compound, are present as flame retardants, by suspension polymerization of styrene in the presence of the flame retardants.

Method for producing expandable polystyrene particles

Flame-retardant foam slabs are based on styrene polymers wherein from 1 to 12% by weight of expanded graphite and also, if desired, from 1 to 12% by weight of a phosphorus compound are present as flame retardants.

Flame-proofed polystyrene foamed materials

Prefoamed polyolefin beads produced by extrusion

Foam boards produced using halogen-free blowing agents

Growing community of inventors

Hassloch, Germany

Franz-Josef Dietzen