Imide/arylene ether copolymers

US5112923A · kind A · utility

Assignee

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

Inventors

• Brian J. Jensen · Williamsburg, US
• Paul M. Hergenrother · Yorktown, US
• Robert G. Bass · Richmond, US

Key dates

• Filing date: Nov 21, 1989
• Grant date: May 12, 1992
• Expiry date: Nov 21, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L79/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Imide/arylene ether block copolymers are prepared by reacting anhydride terminated poly(amic acids) with amine terminated poly(arylene ethers) in polar aprotic solvents and chemically or thermally cyclodehydrating the resulting intermediate poly(amic acids). The resulting block copolymers have one glass transition temperature or two, depending upon the particular structure and/or the compatibility of the block units. Most of these block copolymers form tough, solvent resistant films with high tensile properties.