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Materials comprising thermoset resins and composites that can be processed hot, these compositions resulting from bringing at least one thermosetting resin precursor, having hydroxyl functional groups and/or epoxy groups, and optionally ester functional groups, into contact with at least one hardener chosen from carboxylic acids, in the presence of at least one transesterification catalyst, the total molar content of which is between 5 and 25% of the total molar content of hydroxyl and epoxy groups that are contained in the thermosetting resin precursor.

Estas composiciones resultan de poner en contacto al menos un precursor de resina termoestable, este precursor de resina termoestable que comprende funciones hidroxilo y/o grupos epoxi, y opcionalmente funciones éster, con al menos un endurecedor seleccionado de ácidos carboxílicos, en la presencia de al menos un catalizador de transesterificación del cual la cantidad molar total está entre 5% y 25% de la cantidad molar total de hidroxilo y epoxi contenida en el precursor de resma termoestable.