Reduction of monomer content and stabilization of polyaziridines

US6974874B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Lanny D. Venham · Paden City, US
• Myron W. Shaffer · Irving, US
• Karsten Danielmeier · Solingen, DE
• Karen Henderson · Dorpsstraat, US

Key dates

• Filing date: Oct 31, 2002
• Grant date: Dec 13, 2005
• Expiry date: Jun 9, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for reducing the monomeric aziridine content in a polyaziridine forming reaction mixture by adding to the polyaziridine forming reaction mixture an excess of a carbodiimide scavenger wherein the excess is based on the equivalent ratio of scavenger to monomeric aziridine, and to a product obtained by this process and to a coating composition containing the product obtained by the process.