Phthalocyanine polymers

US4499260A · 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: Nov 10, 1982
• Grant date: Feb 12, 1985
• Expiry date: Nov 10, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method of forming 4,4',4",4'"-tetraamino phthalocyanines by reducing 4,4',4",4'"-tetranitro phthalocyanines, polymerization of the metal tetraamino phthalocyanines with a tetracarboxylic dianhydride (preferably aromatic) or copolymerization with a tetracarboxylic dianhydride and a diamine (preferably also aromatic) to produce amic acids which are then dehydrocyclized to imides. Thermally and oxidatively stable polymers result which form tough, flexible films, etc.