PROCEDE DE PREPARATION DE COPOLYMERES OLEFINIQUES MODIFIES CONTENANT DES ESTERS VINYLIQUES

摘要

A process for producing modified olefin-vinyl ester copolymers, e.g. EVA, by reaction of the copolymers with alcoholic metal alcoholates or solutions of metal alcoholates in the corresponding alcohol at melting points of 343 to 493 DEG K, to effect predetermined partial or total cross-linked products in which ester groups are replaced, in 5 to 95% alcoholysis, by hydroxyl groups, in which process the alcoholysis reactions and cross-linking reactions take place together and are effected by removal of a proportion of alcohol amounting to 5 to 98 % by mass from the reaction mixture after the plastic melt has remained in the processing machine for 15 to 95% of the total time for which the said melt remains in the said machine.