PEROXIDE-FREE GRAFTING OF HOMOPOLYMERS AND COPOLYMERS OF ETHYLENE HAVING DENSITIES EQUAL TO OR GREATER THAN 0.930 G/CM_, AND USE OF THE GRAFT COPOLYMERS FOR THE PREPARATION OF IONOMERS OR ADHESION PROMOTERS

摘要

In a process for the peroxide-free grafting of ethylenically unsaturated carboxylic acids, carboxylic anhydrides and/or their derivatives to a homopolymer or copolymer of ethylene having a density equal to or greater than 0.930 g/cm3, the monomers to be grafted are used in a concentration of from 0.01 to 0.5% by weight and the grafting reaction is carried out at from 210 to 300.degree.C in a conventional extruder or mixer in the absence of a free radical initiator. The graft copolymers are used for the preparation of ionomers and adhesion promoters.