PROCESS FOR PREPARING HIGHER MOLECULAR WEIGHT POLYEPOXIDE PRODUCTS BY REACTING A POLYEPOXIDE WITH A PHENOL IN PRESENCE OF TETRAALKYLAMMONIUM HALIDES

摘要

A process for the preparation of a polyepoxy product by condensation of a polyvalent phenol at a temperature of 120-200ºC with a polyepoxy starting material having a lower molecular weight than that of the polyepoxy product, which is below 3,500 in the presence of 0 at 1% by weight, based on the polyepoxy starting material, of an inert solvent which has a boiling point at atmospheric pressure of at least 140ºC and which is miscible with the polyepoxy product and the reagents, and being below 1 : 1.05 the initial ratio of phenolic hydroxyl groups to epoxy group, in which said condensation is carried out in the presence of 0.05 to 2 milliequivalents of a quaternary ammonium halide catalyst per 100 g of polyepoxy starting material. (Machine-translation by Google Translate, not legally binding)