Coarse-cell polyurethane elastomers

US8642670B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Nils Mohmeyer · Mannheim, DE
• Ralf Fritz · Bohmte, DE
• Annika Habicht · Bohmte, DE
• Daniela Tepe · Dinklage, DE
• Frank Prissok · Bohmte, DE
• Michael Harms · Bohmte, DE
• Bernd Bruchmann · Ludwigshafen, DE
• Daniel Schoenfelder · Brussels, BE
• Daniel Freidank · Shanghai, CN
• Andreas Emge · Bohmte, DE
• Andrea Eisenhardt · Vechta, DE

Key dates

• Filing date: Mar 13, 2009
• Grant date: Feb 4, 2014
• Expiry date: May 4, 2030

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 an open-cell polyurethane foam comprising polyester and polyether structures and having a density of 70 to 300 g/L, 1 to 20 cells/cm, a rebound intensity greater than 30%, an elongation at break of greater than 200%, a tear propagation resistance of greater than 1.2 N/mm and a tensile strength of greater than 200 kPa. The present invention further relates to a process for producing inventive open-cell polyurethane sponges and to the use thereof as a pipe cleaning sponge.