Bis[4-(3,4-dimethylene-pyrrolidyl)phenyl] methane

US4895915A · 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: Feb 16, 1989
• Grant date: Jan 23, 1990
• Expiry date: Feb 16, 2009

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.