Patent ID: 6803004
Filing Date: 2004-10-12
Classification: B29C,C08G

Abstract:
A process for preparing an advanced epoxy material, comprising the steps of:continuously providing to an extruder: (i) an epoxy resin having an average of more than one vicinal epoxy group per molecule; (ii) a linking material having attached thereto an average of more than one moiety reactive with the vicinal epoxy group of the epoxy resin; and (iii) a catalytic amount of at least one iminium salt catalyst for promoting the reaction between the epoxy resin and the linking material; and operating the extruder at a temperature greater than 200Â° C. to cause a reaction between the epoxy resin and linking material for a sufficient residence time to produce an advanced epoxy resin; and continuously removing the produced advanced epoxy resin from the extruder.