Thermosetting polymers from a polyimide and ammonia

US3954711A · kind A · utility

Assignee

• Rhone-Poulenc Sante · FR

Inventors

• Max Gruffaz · La Mulatière, FR
• Pierre Ledru · Lyon, FR

Key dates

• Filing date: Mar 4, 1974
• Grant date: May 4, 1976
• Expiry date: Mar 4, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermosetting polymers, both prepolymers and cured resins, are produced by reacting ammonia with a polyimide of the formula: ##EQU1## IN WHICH A IS A NUMBER FROM 2 TO 4, Y represents an organic radical of valency a, and A and T, which may be identical or different, each represent hydrogen, chlorine or methyl, the proportions of polyimide and ammonia being such that there are at least 2 imide groups per mol of ammonia. These polymers find utility in the production of materials liable to undergo severe heat stresses.