Abstract: A gas phase process for the preparation of co-polymers comprising reacting carbon monoxide and an ethylenically unsaturated compound in the presence of a catalyst system based on(a) a source of cations of a metal of Group VIII of the Periodic Table;(b) a source of anions which comprise a plurality of boron atoms or a source of organic boron containing anions or an aluminoxane; and(c) a source of ligands.

Abstract: A process for the preparation of a copolymer of carbon monoxide with an olefinically unsaturated compound, comprising copolymerizing the monomers in the presence of a Group VIII metal containing catalyst composition and in the presence of an olefinically unsaturated compound (A) which contains in its molecular structure an organic group imparting steric hindrance on the vinyl group. A copolymer obtainable by the said process.

Abstract: A process for the preparation of copolymers by reacting carbon monoxide and one or more ethylenically unsaturated compounds under polymerizable conditions in the substantial absence of a liquid non-polymerizable diluent and in the presence of a catalyst system consisting essentially of:(a) a source of cations of one or more noble metals of Group VIII of the Periodic Table;(b) a source of anions of acids having a pKa of less than 4;(c) a source of cations of one of more metals selected from the group consisting of nickel, cobalt, manganese, lead, zinc, magnesium, iron (II), copper (II), lanthanum and neodymium and(d) a source of bidentate ligands.

Abstract: A catalyst composition useful in polymerizing carbon monoxide with one or more ethylenically unsaturated compounds is presented. The catalyst composition comprises a metal of Group VIII of the Periodic Table and an anion which is weakly or non-coordinating with the Group VIII metal and which includes an oxidant moiety in its molecular structure. A process for the preparation of copolymers catalyzed by this composition is also presented.