Liquid-melt aliphatic dicarboxylic acids

US5405936A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Salih Mumcu · Marl, DE
• Franz-Erich Baumann · Schneverdingen, DE

Key dates

• Filing date: Mar 4, 1994
• Grant date: Apr 11, 1995
• Expiry date: Mar 4, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Liquid-melt aliphatic dicarboxylic acids tend to undergo undesirable discoloration during prolonged storage. The discoloration can be avoided by an addition of 0.1 to 3.0% by weight of a primary amine.