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.:
Date of Patent:
Aug. 13, 2013
Filed:
Apr. 11, 2007
Oliver Steffen Henze, Bremen, DE;
Ruediger Krech, Diepholz, DE;
Frank Prissok, Lemfoerde, DE;
Karin Scheffer, Lemfoerde, DE;
Frank Schaefer, Stemwede, DE;
Heinrich Niermann, Brockum, DE;
Oliver Steffen Henze, Bremen, DE;
Ruediger Krech, Diepholz, DE;
Frank Prissok, Lemfoerde, DE;
Karin Scheffer, Lemfoerde, DE;
Frank Schaefer, Stemwede, DE;
Heinrich Niermann, Brockum, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for the preparation of thermoplastic polyurethane by reacting (a) isocyanates with (b) compounds reactive toward isocyanates and having a molecular weight (M) of from 500 to 10 000 g/mol and (c) chain extenders having a molecular weight of from 50 to 499 g/mol, if appropriate in the presence of (d) catalysts and/or (e) conventional additives, wherein the chain extender mixture consisting of a main chain extender (c1) and one or more co-chain extenders (c2) is used and the thermoplastic polyurethane prepared has a rigid phase fraction of greater than 0.40, the rigid phase fraction being defined by the following formula: