Polyimides containing pendent siloxane groups

US5304627A · kind A · utility

Assignee

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

Inventors

• John W. Connell · Newport News, US
• Terry L. St. Clair · Poquoson, US
• Paul M. Hergenrother · Yorktown, US

Key dates

• Filing date: Nov 2, 1992
• Grant date: Apr 19, 1994
• Expiry date: Nov 2, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/1046
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Novel polyimides containing pendent siloxane groups (PISOX) were prepared by the reaction of functionalized siloxane compounds with hydroxy containing polyimides (PIOH). The pendent siloxane groups on the polyimide backbone offer distinct advantages such as lowering the dielectric constant and moisture resistance and enhanced atomic oxygen resistance. The siloxane containing polyimides are potentially useful as protective silicon oxide coatings and are useful for a variety of applications where atomic oxygen resistance is needed.