Centre National De La Recherche Scientifique

Rhodia Operations

Universite Claude Bernard – Lyon1

Institut National Des Sciences Appliquees De Lyon

Université Jean Monnet Saint-Étienne

René Rossin

Stéphane Jeol

Françoise Fenouillot-Rimlinger

Vincent Mollet

Benjamin Paci

Alain Rousseau

The invention relates to a process for producing aromatic polyimides, comprising the following steps: (a) preparation of one or more solid salt(s) by reacting one or more aromatic tetracarboxylic acid(s) and one or more diamine(s) according to a mole ratio ranging from 0.95 to 1.05; (b) drying of the solid salt(s), (c) addition, to the dry salt resulting from step (b), of one or more compound(s) (C) comprising one or more group(s) chosen from a carboxylic acid group, an anhydride group, an ester group and an acyl chloride group; (d) solid-state polymerization of said solid salt(s) in the presence of the compound(s) (C).

Process for producing aromatic polyimides

Growing community of inventors

Francheville, France

René Rossin