Process for preparing aspartates

US6911501B1 · kind B1 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Karsten Danielmeier · Solingen, DE
• Charles A. Gambino · Berkvam Road, US
• Rolf Gertzmann · Leverkusen, DE
• Richard R. Roesler · Wexford, US
• Terrell D. Wayt · Moundsville, US
• Michele E. Vargo · Pittsburgh, US
• Edward P. Squiller · Pittsburgh, US
• Karen Henderson · Dorpsstraat, US

Key dates

• Filing date: Jan 21, 2004
• Grant date: Jun 28, 2005
• Expiry date: Jan 21, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to novel aspartates, their method of production and the use of these aspartates as reactive components for polyisocyanates in two-component polyurethane coating compositions and for preparing polyurethane prepolymers. The aspartates are prepared by first reacting a di- or polyamine with an unsaturated ester and then reacting the resultant product with a maleimide.