A process for producing an aromatic polyketone which comprises polymerizing an appropriate monomer or monomers by a Friedel-Crafts polymerization reaction using a Lewis acid catalyst . The reaction is conducted under specified conditions depending on the monomer system to control the reaction to obtain melt-­processable, high molecular weight, substantially linear polymers, for example poly(carbonyl-p-phenylene-oxy-p-­phenylene),

poly(carbonyl-p-phenylene-oxy-p-phenylene-oxy-p-phenylene), and the like. Copolymers containing up to 30% by weight of an aromatic sulfonyl halide comonomer can also advan­tageously be produced by this process.

The preparation of poly(arylene ketones) and in particular all para-linked poly(arylene ether ketones) by Friedel-Crafts polymerization in the presence of a Lewis acid generally results in an intractible reaction product difficult to remove from the reaction vessel and difficult to purify. The addition of a liquefaction agent, such as a hydrogen halide and in particular hydrogen chloride, to the reaction mixture, results in a tractible gel or a liquid which can be readily handled. The hydrogen halide is preferably under pressure and a diluent may also be added along with the hydrogen halide.

1. Novel copolymers of sulphur dioxide with ethene and, optionally also carbon monoxide and/or one or more olefinically unsaturated hydrocarbons with less than 20 carbon atoms (A), which copolymers

• a) have a linear structure,
• b) consist of units -Z-(C₂H₄)- and optionally also of units -Z-(A), the latter occurring in random distribution over the copolymer chain, wherein Z represents an SO₂ or CO group with the proviso that at least part of the units Z are SO₂ groups.

The preparation of poly(arylene ketones) and in particular all para-linked poly(arylene ether ketones) by Friedel-Crafts polymerization in the presence of a Lewis acid generally results in an intractible reaction product difficult to remove from the reaction vessel and difficult to purify. The addition of a liquefaction agent, such as a hydrogen halide and in particular hydrogen chloride, to the reaction mixture, results in a tractible gel or a liquid which can be readily handled. The hydrogen halide is preferably under pressure and a diluent may also be added along with the hydrogen halide.

Die vorliegende Erfindung betrifft Polyketonformmassen auf Basis von teilkristallinen, aliphatischen Polyketonen. Insbesondere betrifft sie faserverstärkte Formmassen auf Basis aliphatischer Polyketone, die bevorzugtermaßen geringe Mengen an Phosphinsäure oder deren Salze enthalten. Die Formmassen zeichnen sich durch verbesserte mechanische Eigenschaften und einer guten Verarbeitbarkeit im Spritzguss aus. Diese Formmassen eignen sich zur Herstellung von insbesondere dünnwandigen Formkörpern für die Elektro- und Elektronik-Industrie wie beispielsweise Gehäusen, Gehäusekomponenten oder Konnektoren.