Microcellular urea-containing polyurethane elastomer

US6063824A · kind A · utility

Assignee

• BASF SE

Inventors

• Ruediger Krech · Diepholz, DE
• Udo Rotermund · Ortrand, DE
• Heinz Bollmann · Alfhausen, DE
• Renate Hempel · Ruhland, DE
• Wolfgang Scholz · Beverly, US
• Manfred Genz · Ostercappeln, DE

Key dates

• Filing date: Nov 18, 1998
• Grant date: May 16, 2000
• Expiry date: Nov 18, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2350/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A microcellular PU elastomer having improved dynamic-mechanical properties and based on an isocyanate component consisting essentially of 4,4'-MDI and also further customary constituents has, after heating at from 100 to 120.degree. C. for from 8 to 24 hours, a melting range of from 130.degree. C. as the minimum lower limit to 230.degree. C. as a minimum upper limit, measured by differential scanning calorimetry (DSC) at a heating rate of 20.degree. C./min, and a urea content of from 14 to 18% by weight. A process is also provided for preparing such a microcellular PU elastomer having improved dynamic mechanical properties. The microcellular PU elastomers can be used for producing damping elements.