| abstract |
The invention relates to flame-retarded compositions comprising A) an epoxy resin mixture consisting of A1) 15-35% by weight of at least one liquid epoxy resin, A2) 55-85% by weight of aluminum oxide trihydrate having a particle size of D50 20-25 mu m as determined by sieving, A3) 0-20% by weight of at least one further filler and A4) 0-5% by weight of at least one conventional additive and B) at least one carboxylic acid anhydride or a cycloaliphatic diamine of the formula I or II <IMAGE> (I) <IMAGE> (II) in which the radicals R1 to R4 independently of one another are hydrogen or C1-C4alkyl and Z is a direct bond, -CH2-, -C(CH3)2-, -S-, -O-, -SO2- or -CO-, in an amount sufficient to cure component A, the content of components A2 and A3 together being 63-80% by weight, with respect to the total weight of the composition. These compositions are suitable for use in high voltage components, such as flyback transformers. |