Foamed polyurethanes having improved flexing endurance properties

US9109077B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Nils Mohmeyer · Mannheim, DE
• Daniel Freidank · Shanghai, CN
• Sibylle Schoeps · Munster, DE
• Andreas Emge · Bohmte, DE
• Achim Loeffler · Puming, CN
• Marco Ortalda · Torino, IT

Key dates

• Filing date: Nov 13, 2008
• Grant date: Aug 18, 2015
• Expiry date: Dec 24, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2410/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to foamed polyurethane obtainable by mixing a) polyisocyanates, b) relatively high molecular weight compounds having groups reactive toward isocyanate groups, c) solid particles, d) blowing agents, e) if appropriate, chain extender, crosslinking agent or mixtures thereof, f) if appropriate, catalyst and g) if appropriate, other additives to give a reaction mixture and allowing the reaction mixture to react to completion, the propotion of chain extender being less than 6% by weight, based on the total weight of the components a) to f), the content of solid particles being greater than 15% by weight, based on the total weight of the components a) to f), and the average functionality of the relatively high molecular weight compounds having groups reactive toward isocyanate groups being less 2.5. The present invention furthermore relates to a molding comprising a foamed polyurethane according to the invention, a process for the preparation of the foamed polyurethane according to the invention and the use of a molding according to the invention as a shoe sole.