Oligo (2-alkenyl azlactones)

US5091489A · kind A · utility

Assignee

• Minnesota Mining and Manufacturing Company · US

Inventors

• Steven M. Heilmann · Afton, US
• Dean M. Moren · North St. Paul, US
• Jerald K. Rasmussen · Woodville, US
• Larry R. Krepski · White Bear Lake, US
• Sadanand V. Pathre · Maplewood, US

Key dates

• Filing date: Jul 24, 1991
• Grant date: Feb 25, 1992
• Expiry date: Jul 24, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D263/42
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This invention provides novel azlactone-functional oligomers of 2-alkenyl azlactones in which oligomerization has occurred predominantly via the 2-alkenyl group. Oligomerization of the 2-alkenyl group provides oligomers having 2 to 15 mer units with predominantly carbon-carbon backbone segments. Oligomerized in this fashion, the novel compositions possess azlactone groups which can be reacted with nucleophiles in the normal ring-opening sense. The oligomers are prepared by a novel process in which both Lewis and Bronsted acidic catalysts are effective. The reactive oligomers find utility as crosslinking agents for polymers containing azlactone-reactable nucleophilic groups.