AROMATIC COPOLYESTER-SULPHONE KETONES AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC C08G65/40 C08G75/20 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of producing aromatic copolyester-sulphone ketones used as thermo- and heat-resistant structural polymer materials. Method of producing aromatic copolyester-sulphone ketones involves high-temperature polycondensation of diols and dihaloid derivatives of arenes at their molar ratio of 0.1 to 0.9 and 0.9 to 0.1. Reaction is carried out in medium of N,N-dimethylacetamide with stepwise loading of dihalide derivatives of arenes. Order of dihalidearenes introduction into the reaction medium corresponds to their activity in nucleophilic substitution reactions. At the end of the process, the reaction mixture is diluted with N,N-dimethylacetamide, distilled during synthesis. Method for producing copolyestersulphon ketone I is hydroquinone, diphenylol propane, 4,4'-dichlorodiphenylsulphone, and 4,4'-difluorobenzophenone. Copolyestersulfone ketone II is prepared by hydroquinone, phenolphthalein, 4,4'-dichlorodiphenylsulphone and 4,4'-difluorobenzophenone. Copolyestersulfone ketone III is prepared by 4,4’-dioxydiphenyl, phenolphthalein, 4,4'-dichlorodiphenylsulphone and 4,4'-difluorobenzophenone.

EFFECT: invention increases physical and chemical properties of copolyester-sulphone ketones.

1 cl, 1 tbl, 22 ex