Akzo Nobel N.v.

Steven R Leijenaar

Andrzej M Piotrowski

Paul K Hanna

Gerrit Hoentjen

Bert J Lommerts

Copolymers comprising carbon monoxide and ethylene contain at least one type of ketal structure and possess enhanced thermal stability so as to be useful in the melt processing of fibers. These novel copolymers, as well as known polyketones with ketal structures, can be formed by treating a copolymer of carbon monoxide and at least one olefin with a mixture of acid, such as a sulfonic acid, which acts as a catalyst or catalyst/reagent, and alcohol, such as a lower alkanol.

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Arnhem, Netherlands

Steven R Leijenaar