POLYESTER-KETONE SYNTHESIS METHOD Russian patent published in 2010 - IPC C08G65/00 C07C43/275 C07C43/285 C07C43/295 C08G65/40 C08G65/42 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing high-molecular compounds, particularly methods of producing aromatic polyesters through high-temperature polycondensation. Aromatic polyester-ketones are obtained by reacting dioxy-compounds with potassium hydroxide and distillation of an azeotropic mixture of water and chlorobenzene. At the first step synthesis is carried out between phenolate and 4,4'-dichlorobenzophenone for 3 hours at 220-250°C in diphenylsulfone. At the second step, synthesis is carried out between oligoketone with condensation degree n=20 and 4,4'-difluorobenzophenone for 6 hours at 250-270°C in an inert medium.

EFFECT: invention reduces cost of aromatic polyester-ketones by more than 10 times due to use of relatively cheap 4,4'-dichlorobenzophenone.

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