TETRABROMOXYLYLENE DIACRYLATES AND SUBSTITUTED ACRYLATES

摘要

Tetrahaloxylylene diesters having the general formulae: (I) (II) wherein R represents hydrogen or a methyl group and X is bromine or chlorine, with the proviso that, when X is chlorine, there is no more than one chlorine atom per molecule, are obtained by converting acrylic acid or methacrylic acid in a polar solvent into an alkali salt thereof, and reacting m- or o- tetrabromoxylylene dichloride with a stoichiometric excess of from 1 to 10 mole % of the alkali salt obtained, in the presence of a polymerisation inhibitor at 50 to 150.degree.C. These diesters are particularly useful as reactive crosslinkers for unsaturated compounds and fire-retarding additives to polymers.