Process for producing foams based on thermoplastic polyurethanes

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United States of America Patent

PATENT NO 11052570
APP PUB NO 20180066122A1
SERIAL NO

15551314

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Abstract

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A process for producing foamed thermoplastic polyurethane particles comprises the steps of a) melting a thermoplastic polyurethane in a first extruder (E1), b) injecting a gaseous blowing agent in a second extruder (E2), c) impregnating the gaseous blowing agent homogeneously into the thermoplastic polyurethane melt in a third extruder (E3), 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.

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Patent Owner(s)

  • BASF SE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Negishi, Eiji Funabashi, JP 3 0
Nomura, Akira Singapore, SG 19 110
Rudolph, Hans Bad Essen, DE 58 665
Tomata, Tatsuro Fuji, JP 1 0
Yamamoto, Etsuhiro Yatomi, JP 4 9

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