Process for preparing phthalocyanine polymer from imide containing bisphthalonitrile

US4649189A · kind A · utility

Assignee

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

Inventors

• Bappalige N. Achar · Mumbai, IN
• George M. Fohlen · Millbrae, US
• John A. Parker · Los Altos, US

Key dates

• Filing date: Jul 12, 1985
• Grant date: Mar 10, 1987
• Expiry date: Jul 12, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/1003
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Imide-linked bisphthalonitrile compounds are prepared by combining a dicyano aromatic diamine and an organic dianhydride to produce an amic acid linked bisphthalonitrile copound. The amic acid linked bisphthalonitrile compound is dehydrocyclized to produce the imide-linked bisphthalonitrile compounds. The imide-linked bisphthalonitrile compounds may be polymerized to produce a phthalocyanine polymer by heating the imide-linked bisphthalonitrile compound, either alone or in the presence of a metal powder or a metal salt. These compounds are useful in the coating, laminating and molding arts. The polymers are useful in composite matrix resins where increased fire resistance, toughness and resistance to moisture are required, particularly as secondary structures in aircraft and spacecraft.