METHOD OF PRODUCING POLYESTER KETONES Russian patent published in 2014 - IPC C08G65/34 C08G65/40 

FIELD: chemistry.

SUBSTANCE: described is a method of producing aromatic polyester ketones based on dioxy compounds and dihalogen benzophenones, which involves reacting dioxy compounds with potassium hydroxide or sodium hydroxide, distilling the water-toluene azeotropic mixture, the method being characterised by that synthesis is carried out in two steps: at the first step synthesis is carried out between diphenolate and 4,4'-dichlorobenzophenone for 3 hours at 160-170°C in dimethylsulphoxide, and at the second step synthesis is carried out between the formed oligoketone and 4,4'-difluorobenzophenone for 3 hours at 160-170°C in a mixture of dimethylsulphoxide and N,N-dimethylacetamide in volume ratio of 1:5.

EFFECT: simple and cheap method of producing high-molecular weight polyester ketones.

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