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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11052570 B1

PDFFull Text
Date of Patent:
Jul. 06, 2021

Filed:

Feb. 09, 2016

Process for producing foams based on thermoplastic polyurethanes

Applicant:

Basf SE, Ludwigshafen, DE;

Inventors:

Hans Rudolph, Bad Essen, DE;

Etsuhiro Yamamoto, Yatomi, JP;

Eiji Negishi, Funabashi, JP;

Akira Nomura, Singapore, SG;

Tatsuro Tomata, Fuji, JP;

Assignee:

BASF SE, Ludwigshafen, DE;

Attorney:

Grüneberg and Myers PLLC

Primary Examiner:

Matthew J Daniels

Assistant Examiner:

Wayne K Swier

Int. Cl.
CPC ...
B29B 7/88 (2006.01); B29C 48/05 (2019.01); B29C 48/00 (2019.01); B29C 48/345 (2019.01); B29C 48/385 (2019.01); B29B 9/06 (2006.01); B29C 44/34 (2006.01); C08J 9/12 (2006.01); B29B 9/12 (2006.01); C08J 9/34 (2006.01); C08J 9/16 (2006.01); C08J 9/236 (2006.01); C08J 9/18 (2006.01); B29K 75/00 (2006.01); B29K 101/12 (2006.01); B29C 48/04 (2019.01); B29K 105/04 (2006.01);
U.S. Cl.
CPC ...
B29B 7/88 (2013.01); B29B 9/065 (2013.01); B29B 9/12 (2013.01); B29C 44/3446 (2013.01); B29C 44/3461 (2013.01); B29C 48/0012 (2019.02); B29C 48/0022 (2019.02); B29C 48/05 (2019.02); B29C 48/345 (2019.02); B29C 48/385 (2019.02); C08J 9/122 (2013.01); C08J 9/16 (2013.01); C08J 9/18 (2013.01); C08J 9/236 (2013.01); C08J 9/34 (2013.01); B29C 48/04 (2019.02); B29K 2075/00 (2013.01); B29K 2101/12 (2013.01); B29K 2105/04 (2013.01); B29K 2995/0063 (2013.01); C08J 2201/026 (2013.01); C08J 2201/03 (2013.01); C08J 2203/06 (2013.01); C08J 2203/182 (2013.01); C08J 2300/22 (2013.01); C08J 2300/26 (2013.01); C08J 2375/04 (2013.01);
Abstract

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.

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