Hydrophobic light stable polyurethane elastomer with improved mechanical properties

US6780957B1 · kind B1 · utility

Assignee

• Bayer Polymers LLC · US

Inventors

• Karl W. Haider · Wexford, US
• Jack C. Chan · Peachtree City, US
• E. Haakan Jonsson · Dorpsstraat, US
• Uli Franz · Solingen, DE
• Ronald P. Taylor · Charlottesville, US

Key dates

• Filing date: Dec 29, 1999
• Grant date: Aug 24, 2004
• Expiry date: Dec 29, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/69
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A hydrophobic polyurethane elastomer is disclosed comprising an isocyanate terminated prepolymer having an isocyanate content ranging from 4 to 12 wt. % NCO comprising the reaction product of: i) an OH terminated homopolymer of butadiene having molecular weight ranging from 1000 to 4000 and an OH functionality of from 1.9 to 2.1; ii) an aliphatic or cycloaliphatic diisocyanate; and a diol chain extender having a molecular weight ranging from 62 to 400.