Process for preparing mono and polyaspartates

US5821326A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerald Kurek · Leverkusen, DE
• Josef Pedain · Cologne, DE
• Reinhard Halpaap · Odenthal, DE
• Michael Sonntag · Odenthal, DE

Key dates

• Filing date: Jun 25, 1997
• Grant date: Oct 13, 1998
• Expiry date: Jun 25, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a new process for preparing mono and polyaspartates from primary mono and polyamines and maleates in presence of five-membered aromatic ring compounds containing nitrogen atoms in the ring structure as catalysts and use of these mono and polyaspartates as reactive components for polyisocyanates in two-component polyurethane coating compositions and for preparing polyurethane prepolymers.