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

FIELD: chemistry.

SUBSTANCE: invention relates to aromatic copolyester-sulphone ketones (ACPESK) of the following formulas, which can be used as heat- and heat-resistant structural polymer materials, as well as to a method of producing aromatic copolyester-sulphone ketones. Aromatic copolyester-sulphone ketones have the formulas given below, in which the numbers of monomer links correspond to a, b, c, d=1.0–9.0. Method of producing aromatic copolyester-sulphone ketones involves high-temperature polycondensation of 3,3'5,5'-tetramethyl diphenylol propane, diphenylol propane, 4,4'-dichlorodiphenylsulphone and 4,4'-difluorobenzophenone, or 3,3'5,5'-tetramethyl diphenylol propane, phenolphthalein, 4,4'-dichlorodiphenylsulphone and 4,4'-difluorobenzophenone, or 4,4'-dioxydiphenyl, 3'3'5,5'-tetramethyldiphenylol propane, 4,4'-dichlorodiphenylsulphone and 4,4'-difluorobenzophenone. Reaction is carried out in N,N-dimethylacetamide medium at temperature of 170 °C. Then hexafluorobenzene is added to the reaction mixture as a blocker of terminal phenoxy groups and a substance which increases solubility of copolymers in organic solvents.

EFFECT: invention enables to obtain copolymers with high heat and heat resistance, physical and mechanical properties, high solubility in organic solvents.

2 cl, 1 tbl, 21 ex