Basf Se Corporation

Sebastian Richter

Heinz-Dieter Lutter

Zeljko Tomovic

Johannes Poppenberg

Elmar Poeselt

Markus Schuette

Frank Schaefer

Rajan Hollmann

Christian Koenig

Hendrik Wagner

Johann Martin Szeifert

Sebastian Alexander Weisse

Udo Hadick

Kathrin Cohen

Frank Thielbeer

Steffen Mayer

Markus Susoff

Amir Doroodian

Martin Hufnagel

Achim Besser

The present invention is directed to a method for preparing a thermoplastic polyurethane having a low glass transition temperature. The process according to the present invention comprises the steps of providing at least one polyol composition (P) comprising a poly-ε-caprolactone polyol (P1), and a second polyol (P2) which is different from the first polyol (P1), and reacting the at least one polyol composition (P) with at least one polyisocyanate (P1) and at least one low molecular weight diol (CE) optionally in the presence of at least one catalyst (CA) and/or at least one additive (AD) to obtain a thermoplastic polyurethane. The present invention is also directed to the thermoplastic polyurethane obtained according to the process of the present invention and the use thereof in extruded articles and injection molded articles.

Method for preparing a thermoplastic polyurethane having a low glass transition temperature

Described herein is a process for preparing a foam (FA) with a Poisson's ratio in the range of from &#x2212;0.5 to 0.3, the method including the steps of providing a foam (F1) with a flow resistance in the range of from 3000 to 8000 Pas/m, determined according to DIN EN 29053, and subjecting the foam (F1) to thermoforming including triaxial compression, wherein the foam (F1) is not reticulated prior to step (ii). Also described herein is the foam obtained or obtainable according to the process and the use of the foam as, for example, an energy absorbing device, preferably in protective gear, furniture, cushions, in cleaning devices with improved rinse-out behavior, in shoe soles, or as sealing, insulating or anchorage providing material for example used in earphones, ear plugs or dowels, or as acoustic material.

Auxetic polyurethane and melamine foams by triaxial compression

A graft macromer, comprising the reaction product of at least one macromer being at least one molecule which comprises in its structure one or more hydroxyl-terminated polyether and/or polyester chains, with at least one grafting compound which comprises in its structure at least one at least monoalkoxylated or at least monohalogenated silyl group and at least one alkyl, cycloalkyl or aryl containing group which is reactive towards the hydroxyl group of the macromer, is used for dispersing e.g. SiOin a polyol.

Oxidic silicon particle dispersion in polyol

The present invention relates to a thermoplastic polyurethane obtainable or obtained by reacting a polyisocyanate composition, a chain extender, and a polyol composition, wherein the polyol composition comprises a polyol (P1) which has a molecular weight Mw in the range from 1500 to 2500 g/mol and has at least one aromatic polyester block (B1). The present invention further relates to a process for producing a shaped body comprising such a thermoplastic polyurethane, and to shaped bodies obtainable or obtained by a process of the invention.

Polyurethane with improved tear strength

The present invention relates to a thermoplastic polyurethane obtainable or obtained by converting a polyisocyanate composition, a one chain extender, and a polyol composition, wherein the polyol composition comprises a polyol (P1) which has a molecular weight Mw in the range from 500 to 2000 g/mol and has at least one aromatic polyester block (B1), wherein the hard segment content in the thermoplastic polyurethane is &#x3c;75%. The present invention further relates to a process for producing a shaped body comprising such a thermoplastic polyurethane, and to shaped bodies obtainable or obtained by a process of the invention.

Hard transparent thermoplastic polyurethane

A method for producing a shaped body, containing: producing the shaped body from a composition by a powder-based layer construction process, wherein the composition contains a thermoplastic polyurethane, obtained by reacting a polyisocyanate composition and a polyol composition, the thermoplastic polyurethane is solid at least in a temperature region below 50&#xb0; C. and has end groups selected from the group consisting of first end groups and second end groups, wherein the first end groups are optionally eliminated at a first temperature, and the second end groups are optionally eliminated at a second temperature, to form reactive groups on the thermoplastic polyurethane that optionally enter into a reaction with functional groups of the thermoplastic polyurethane or functional groups of a further component of the composition, and wherein the first temperature and the second temperature are each greater than or equal to 60&#xb0; C.

Reactive thermoplastic polyurethane based on blocked isocyanates

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Lemfoerde, Germany

Sebastian Richter