Preparation of aromatic polymers

Details Preparation of aromatic polymers Preparation of aromatic polymers

C - Chemistry, Metallurgy

08

G

402/302, 402/33

C08G 61/12 (2006.01) C08G 67/00 (2006.01) C08G 75/23 (2006.01)

Patent

CA 1244996

ABSTRACT OF THE DISCLOSURE 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. A controlling agent such as a Lewis base may be added to the reaction medium and/or the reaction is conducted under specified conditions to control the reaction. The reaction medium comprises, for example, aluminum trichloride as the Lewis acid, an organic Lewis base such as N,N-dimethylformamide or an inorganic Lewis base such as sodium or lithium chloride, and a diluent such as methylene chloride or dichloroethane. The amount of Lewis acid, the amount of Lewis base, the temperature of the reaction and the monomer to diluent ratio are varied depending on the monomer system to obtain melt-processable, high molecular weight, substantially linear polymers, for example poly (carbonyl-p-phenylene-p-oxy-p-phenylene), poly(carbonyl-p- phenylene-p-oxy-p-phenylene-p-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.

450962

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