Low temperature impact resistant, easily flowing, thermoplastic polyurethane elastomer compositions, a process for their preparation and their use

US5331044A · kind A · utility

Assignee

• BASF SE

Inventors

• Deitrich Lausberg · Ludwigshafen, DE
• Rolf Steinberger · Schifferstadt, DE
• Walter Heckmann · Weinheim, DE
• Harald Schulz · Kammeltal, DE

Key dates

• Filing date: Feb 7, 1990
• Grant date: Jul 19, 1994
• Expiry date: Feb 7, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention deals with low temperature impact resistant, easily flowing, thermoplastic polyurethane elastomer compositions, comprising: PA0 A) 5-95 parts by weight of at least one thermoplastic polyurethane elastomer (A) having a Shore A hardness less hah 95; and PA0 B) 95-5 parts by weight of at least one thermoplastic polyurethane elastomer (B) having a Shore A hardness greater than 98, whereby the parts by weight of (A) and (B) total 100 parts by weight; and PA0 C) 0-60 weight percent based on the weight of (A) and (B) of a reinforcing filler. The products are prepared by melting together polyurethane elastomers (A) and (B) at temperatures of from 140.degree.-250.degree. C., preferably in an extruder, and are most preferred for the preparation of ski boots and injection molded articles for motor vehicles.