One-component epoxy resin system for trickle impregnation and hot dip rolling

摘要

The present invention relates to a process for preparing resin impregnated wire windings by trickling an impregnating resin onto a heated rotating winding or by dipping the heated rotating winding in a bath filled with an impregnating resin. The impregnating resin comprises an epoxy resin and an initiator for the polymerization of the epoxy resin. The initiator is either a selected compound that is activated by ultraviolet irradiation, a heat-activatible initiator, or a mixture thereof. The heat-activatible initiator is a mixture comprising at least one quarternary ammonium salt and at least one thermal radical former.