Process for preparing crystalline aromatic polyetherketones

Details Process for preparing crystalline aromatic polyetherketones Process for preparing crystalline aromatic polyetherketones

C - Chemistry, Metallurgy

08

G

402/33, 402/37

C08G 65/40 (2006.01) C08G 65/38 (2006.01)

Patent

CA 1262000

ABSTRACT OF THE DISCLOSURE A process for preparing a crystalline aromatic polyetherketone having a reduced viscosity of 0.6 or more which comprises polycondensing an aromatic dihydroxy compound with a dihalogeno aromatic ketone in a solvent having the following general formula (I) or (II): Image (I) Image (II) wherein each of R1, R2 and R3 is independently a hydrogen atom, a C1-3 alkyl group or a phenyl group; X is an oxygen atom, a sulfur atom or a direct bond; Y is an oxygen atom or a ketone group; and n is O or l; in the presence of an alkali compound.

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