HALOGEN-FREE RESIN MIXTURE, A SELF-EXTINGUISHING PREPREG CONTAINING THIS MIXTURE AND THE USE OF SUCH A PREPREG

摘要

Described is a halogen-free resin mixture consisting of: (a) 20-60 % by wt. of epoxy resin, (b) 20-60 % by wt. of phenolic novolak hardener, (c) 5-65 % by wt. of zinc borate used as fireproofing agent, (d) 0-30 % by wt. of additives. Also described is a self-extinguishing prepreg with 40-200 % of resin coating and manufactured by applying this resin mixture to flat substrates. This self-extinguishing prepreg is particularly suitable for use as an insulating material for electric machines and transformers.