Patent ID: 9562132
Date: 2017-02-07
CPC Classifications: B29B,B29K,C08G,C08L,Y02W

Claim:
1. A material resulting from the hardening of a thermosetting resin, the thermosetting resin formed by contacting: a composition comprising at least one thermosetting resin precursor, wherein the thermosetting resin precursor comprises hydroxyl functions and/or epoxy groups, and optionally ester functions, with a composition comprising at least one hardener chosen from acid anhydrides, in the presence of at least one transesterification catalyst whose total molar amount is between 5% and 25% of the total molar amount of hydroxyl and epoxy contained in the thermosetting resin precursor, wherein the catalyst is dissolved in the composition comprising the thermosetting resin precursor or in the composition comprising the hardener, wherein the amount of hardener is such that the resin is in the form of a network, and wherein: N N N wherein the material has a storage modulus between 5×10 wherein the material is thermoformed by applying a mechanical constraint at a temperature above the glass transition temperature of the material.