Bis[4-(3,4-dimethylenepyrrolidyl)phenyl]methane

US4851544A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventor

• Raphael Ottenbrite · Midlothian, US

Key dates

• Filing date: Jul 19, 1988
• Grant date: Jul 25, 1989
• Expiry date: Jul 19, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A polyimide composition consisting essentially of recurring units having the following structural formula: ##STR1## is produced by the copolymerization of a bismaleimide and bis[4-(3,4-dimethylenepyrrolidyl)phenyl]methane.