EP0774479A3 — Process for the preparation of copolymers based on carbon monoxide and at least one compound containing an alkenyl unsaturation

USPTO Abstract

An improved process is described for the preparation of alternating linear copolymers based on carbon monoxide and at least one compound containing an alkenyl unsaturation which comprises reacting in a liquid solvent under the operating conditions, a mixture of carbon monoxide and one or more compounds containing an alkenyl unsaturation in the presence of: (i) a catalyst having general formula (I) [Pd(chel)(chel')] ++ [A - ] 2 wherein chel and chel', the same or different, represent a nitrogenated or phosphorated bidentate chelating agent, and A - represents an essentially non-coordinating, non esterifiable and non labile anion of an acid with pKa less than 2; and (ii) a cocatalyst having general formula (II) [chel''H + ][A' - ] wherein A' - , the same as or different from A - , has the same meaning defined above and chel'' represents a nitrogenated bidentate chelating agent the same as or different from chel and chel'.