Rhone-poulenc Industries

Rhone-poulenc S.a.

Pierre Ledru

Max Gruffaz

Rene Angleraud

Maurice Ducloux

Multicellular materials having excellent heat-resistance are provided by preparing granules of

Process for the manufacture of heat resistant multicellular materials

A thermosetting composition is provided which comprises the reaction product of (a) at least one N,N'-bis-imide of an unsaturated dicarboxylic acid, of general formula ##STR1## in which T represents a divalent organic radical containing a carbon-carbon double bond and Q is a divalent organic radical of 2 to 30 carbon atoms, (b) at least one polyamine of general formula

Thermosetting bis-imide compositions

Thermosetting compositions are provided which are particularly suitable for use in the form of solutions, in making laminates. The compositions comprise (a) a prepolymer possessing imide groups derived from a polyimide and ammonia and (b) an unsaturated polyester.

Unsaturated polyester with polyimide-ammonia prepolymers as

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.

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Lyon, France

Pierre Ledru