Epoxy Resin Compositions Cured with Dianhydrides of Tetracarboxylic Acids

Abstract

Curing of epoxy resin compositions with tetracarboxylic dianhydrides in the presence of BF₃ aromatic amines as initiators is presented. The presence of boron trifluoride amine complexes enables to crosslink the epoxy resin at room temperature. It was shown that the reactivity of the complex may be controlled by the nature of the amine. The influence of the initiator concentration and curing conditions on the mechanical and thermal properties of the epoxy resin is also presented. The epoxy resins cured at room temperature exhibit good mechanical properties and high thermal resistance. The deflection temperature of the composition was higher than 180°C and after postcuring heating the deflection temperature exceeded 220°C.

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