Shell Oil Comapny

Johan M Beyen

Johannes L Syrier

Antonius A Broekhuis

Franciscus C Groenland

Dirk A Borger

Polyketone polymer composition comprising a major amount of an alternating copolymer of carbon monoxide and an olefinically unsaturated compound and a minor amount of at least one additive, selected from: (a) the acid amides of monocarboxylic or polycarboxylic acids having from 5 to 30 carbon atoms and being optionally N-monosubstituted or N,N-disubstituted with C.sub.1 to C.sub.4 alkyl groups, and (b) aluminum compounds of formula Al(OX).sub.3, in which X stands for a hydrogen atom or a C.sub.1 to C.sub.4 alkyl group.

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Amsterdam, Netherlands

Johan M Beyen