Compsns. are based on (a) a liq. unmodified epoxy resin; (b) methyl hexahydrophthalic anhydride (I) as cross linking agent; (c) 2,4,6-tri-(dimethylaminomethyl)-phenol as accelerator (II) and (d) opt. fillers and pigments. The compsns. are esp. useful for the injection moulding of electrical insulation components. They contain no components which detract from the excellent mechanical, electrical and chemical resistant properties of the epoxy resin. The compsns. cure 4-5 times more rapidly than prior art epoxy resins. A 5-10 kg pressure injected bisphenol-A epoxy resin-based moulding gels in 2-3 mins. at 3-5 atmos. pressure and 165 degrees C.
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