Abstract: The invention relates to the process for the preparation of liquid reaction products of cycloaliphatic epoxides with mono- or multifunctional hydroxy compounds. The process comprises reacting a polyfunctional cycloaliphatic epoxy resin with a mono- or multifunctional hydroxy compound in the presence of a heterogeneous surface-active catalyst. The invention also relates to curable compositions containing the product obtained by the process.

Abstract: The invention relates to flame-retarded compositions comprisingA) an epoxy resin mixture consisting ofA1) 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 D.sub.50 20-25 .mu.m as determined by sieving,A3) 0-20% by weight of at least one further filler andA4) 0-5% by weight of at least one conventional additiveandB) at least one carboxylic acid anhydrideora cycloaliphatic diamine of the formula I or II ##STR1## in which the radicals R.sub.1 to R.sub.4 independently of one another are hydrogen or C.sub.1 -C.sub.4 alkyl and Z is a direct bond, --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --S--, --O--, --SO.sub.2 -- 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.

Abstract: Compositions comprising(a) a liquid epoxy resin,(b) a filler containing at least 50% by weight of quartz flour,(c) a polyether polyol, and(d) an organically modified sheet silicate,show a constant viscosity under thermal and mechanical stress and are suitable for applications in vacuum casting technology, especially as encapsulating material for electrical and electronic components.

Abstract: Orthocarbonates of the formula I ##STR1## in which R is C.sub.1 -C.sub.4 alkyl, x is zero, 1 or 2, and A is a trivalent radical derived from an aliphatic triol by omitting the hydroxyl groups, the hydroxyl groups of the triol being bonded to different carbon atoms, are suitable as cocomponents in the curing of epoxy resins in that they limit the reduction in volume occurring during curing of epoxy resins. In addition, the cured resins are distinguished by increased flexural strength and impact strength.

Abstract: Curable mixtures, containing,(a) at least one bisphenol diglycidyl ether based on bisphenol A, hydrogenated bisphenol A or bisphenol F,(b) as a curing catalyst, a colorless or slightly yellow solution of a metal complex compound of the formula I]Me(H.sub.2 O).sub.x (Lm).sub.y ].sup.2+ (A.sup..crclbar.).sub.2 (I),in whichMe is a divalent metal from the group comprising Zn, Cd, Sn, Pb, Ca or Mg,Lm is a saturated cyclic ether having 5 to 7 ring atoms, a linear or cyclic saturated aliphatic ether compound or a mixture of the ether and the ether compound, the ether and the ether compound having a boiling point of at least 60.degree. C., andA is an anion of the formula BF.sub.4.sup..crclbar., PF.sub.6.sup..crclbar., AsF.sub.6.sup..crclbar. or SbF.sub.6 .sup..crclbar.