Patent · US Active

Thermoplastic polyurethanes

US8507633B2 · kind B2 · utility

4Cited by

5References

10Claims

0Family size

Assignee

BASF SE

Inventors

Oliver Steffen Henze · Bohmte, DE
Ruediger Krech · Diepholz, DE
Frank Prissok · Bohmte, DE
Karin Scheffer · Bohmte, DE
Frank Schaefer · Lörrach, DE
Heinrich Niermann · Brockum, DE

Key dates

Filing date	Apr 11, 2007
Grant date	Aug 13, 2013
Priority date	—
Expiry date	Jun 24, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2120/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of thermoplastic polyurethane by reacting (a) isocyanates with (b) compounds reactive toward isocyanates and having a molecular weight (Mw) 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:

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.