Thermoplastic polyurethanes and their preparation

US5908894A · kind A · utility

Assignee

• BASF SE

Inventors

• Manfred Genz · Ostercappeln, DE
• Frank Prissok · Bohmte, DE
• Peter Horn · Heidelberg, DE
• Ruediger Krech · Diepholz, DE
• Gerhard Lehr · Schwegenheim, DE
• Horst King · Schifferstadt, DE

Key dates

• Filing date: Nov 13, 1997
• Grant date: Jun 1, 1999
• Expiry date: Nov 13, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Thermoplastic polyurethanes are prepared by reacting (a) isocyanates with (b) compounds reactive toward isocyanates, in the presence or absence of (c) chain extenders, (d) catalysts and (e) customary auxiliaries and additives and adding crosslinked polyurethanes in comminuted form before, during and/or after the reaction.