Polyurethane elastomers which exhibit improved stability to hydrolysis

US6737471B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Lorenz · Worms, DE
• Marc Schütze · Dortmund, DE
• Erhard Michels · Neunburg vorm Wald, DE
• Alexander Eckhardt · Recklinghausen, DE

Key dates

• Filing date: Dec 14, 2001
• Grant date: May 18, 2004
• Expiry date: Dec 14, 2021

Classification

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

Abstract

A solid and/or cellular polyurethane elastomers which are produced using polyester polyols are disclosed. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one esters of monobasic carboxylic acid or polybasic carboxylic acids, the (first) dissociation constant (pK) of which is 0.5 to 4.