Preparation of polyarylene ether ketones

Details Preparation of polyarylene ether ketones Preparation of polyarylene ether ketones

C - Chemistry, Metallurgy

08

G

C08G 61/12 (2006.01) B01J 19/24 (2006.01)

Patent

CA 2129789

Abstract of the Disclosure: For the preparation of polyarylene ether ketones by Friedel-Crafts polycondensa- tion, a reaction mixture consisting of A. a monomer system, B. a Lewis acid, C. if required, a Lewis base and D. an inert solvent is subjected to polycondensation in two reaction zones, discharged from the second reaction zone with plug flow and compounded. The reaction mixture is subjected to polycondensation in the first reaction zone while stir- ring to a viscosity of about 2,000 mPa.s, is transferred to the second reaction zone and is discharged therefrom by means of an inert solvent or of an inert gas saturated with the solvent, under from about 6 to 65, preferably from 10 to 25, bar, the transport pressure being reduced in at least two stages and the pressure reduction in the first stage being not more than 60%.

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