Process for the preparation of copolymers

摘要

It is herein disclosed a process for the preparation of copolymers of carbon monoxide and one or more ethylenically unsaturated compounds by reacting the monomers under polymerization conditions in the presence of a catalyst system consisting essentially of: a) a source of cations of one or more metals of Group VIII of the Periodic Table; b) a bidentate ligand; c) a source of anions; and in the further presence of a diluent in which the copolymers are insoluble or virtually insoluble, and of an acid, wherein the molar ratio between the acid and the metal(s) of Group VIII, at least during the initial stage of the polymerization is at least 5.1. Copolymers prepared according to the inventive process have and exhibit improved bulk density, and shaped articles of manufacture can be manufactured by utilizing such copolymers.