Basf Se Corporation

Hans Rudolph

Oliver Steffen Henze

Oliver Muehren

Alfons Bertels

Thomas Flug

Sabine Conrad

Christian Beckmann

Dietmar Meier

Klaus Hahn

Frank Prissok

Peter Gutmann

Bernhard Schmied

Jürgen Ahlers

Elke Marten

Torben Kaminsky

Christian Däschlein

Etsuhiro Yamamoto

Akira Nomura

Sabine Moeller

Dirk Rosenbohm

Eiji Negishi

Bernd Lohaus

Rainer Klostermann

Aleksandra Lehmann

Tatsuro Tomata

Oliver MÜHREN

Sabine MÖLLER

A process for producing foamed thermoplastic polyurethane particles comprises the steps of a) melting a thermoplastic polyurethane in a first extruder (E), b) injecting a gaseous blowing agent in a second extruder (E), c) impregnating the gaseous blowing agent homogeneously into the thermoplastic polyurethane melt in a third extruder (E), d) extruding the impregnated thermoplastic polyurethane melt through a die plate and granulating the melt in an underwater granulation device under temperature and pressure conditions to form foamed thermoplastic polyurethane particles.

Process for producing foams based on thermoplastic polyurethanes

The present invention relates to compositions comprising at least one thermoplastic polyurethane, at least melamine cyanurate, at least one first phosphorus-containing flame retardant (F1) selected from the group consisting of derivatives of phosphoric acid and derivatives of phosphonic acid and at least one further phosphorus-containing flame retardant (F2) selected from the group consisting of derivatives of phosphinic acid, and to the use of such a composition for production of cable sheaths.

Flame-retardant thermoplastic polyurethane

The present invention relates to compositions comprising at least one thermoplastic polyurethane TPU-1 based on an aliphatic diisocyanate, at least one metal hydroxide and at least one phosphorus-containing flame retardant, especially those compositions which further comprise at least one thermoplastic polyurethane TPU-2 based on an aromatic diisocyanate. The present invention further relates to the use of such compositions for production of cable sheaths.

The invention relates to a process for production of expanded pellets from a polymer melt comprising a blowing agent, said process comprising the steps of:

Method for producing expanded granules

The invention relates to a flame-retardant thermoplastic polyurethane based on at least one diisocyanate and on at least one substance reactive toward isocyanate, and preferably on at least one chain extender, and also optionally on at least one catalyst, and comprising at least one flame retardant, and also optionally additives and/or auxiliaries, where one flame retardant is a metal hydroxide at least to some extent surrounded by a coating, the material comprises, as further flame retardant, at least one phosphorus-containing flame retardant which is a derivative of phosphoric acid, phosphonic acid, and/or phosphinic acid and the material further comprises hydrotalcite and/or phyllosilicate, and also to an associated production process and the use.

Flame-retardant thermoplastic polyurethane comprising coated metal hydroxides, phosphorus-containing flame retardants and/or hydrotalcite or phyllosilicate

The invention relates to a flame-retardant thermoplastic polyurethane based on at least one diisocyanate and on at least one substance reactive toward isocyanate, and preferably on at least one chain extender, and also optionally on at least one catalyst, and comprising at least one flame retardant, and also optionally additives and/or auxiliaries, where one flame retardant is a metal hydroxide at least to some extent surrounded by a coating, and the metal hydroxide is aluminum hydroxide, aluminum oxide hydroxide, or a mixture of said hydroxides, and also to an associated production process and use.

Flame-retardant thermoplastic polyurethane comprising coated metal hydroxides based on aluminum

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Bad Essen, Germany

Hans Rudolph