Ethynyl terminated imidothioethers and resins therefrom

US4861882A · kind A · utility

Assignee

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

Inventors

• Paul M. Hergenrother · Yorktown, US
• John W. Connell · Newport News, US
• R. Gerald Bass · Richmond, US

Key dates

• Filing date: Jul 14, 1988
• Grant date: Aug 29, 1989
• Expiry date: Jul 14, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/128
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Ethynyl terminated imidothioethers (ETIs) are prepared by the reaction of a dimercaptan, such as 4,4'-dimercaptodiphenyl ether, and an ethynyl containing maleimide, such as N-(3-ethynylphenyl)maleimide. Blends of thse ETIs and ethynyl terminated polymeric materials, such as ethynyl terminated sulfones and ethynyl terminated arylene ethers, are also prepared. These resin blends exhibit excellent processability, and the cured blends show excellent fracture toughness and solvent resistance, as well as excellent adhesive and composite properties.