HALOGEN-CONTAINING AROMATIC COPOLYESTER SULFIDE SULFONES Russian patent published in 2022 - IPC C08G65/40 C08G75/23 

FIELD: material engineering.

SUBSTANCE: present invention relates to unsaturated halogen-containing aromatic polyester sulfide sulfones, which can be used as structural and film materials in electronics, electrical engineering, aviation, space, automotive and other industries. Halogen-containing aromatic copolyester sulfide sulfones have the formula

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These copolyester sulfide sulfones were obtained by the interaction of 4,4'-dichlorodiphenylsulfone with a mixture of 1,1-dichloro-2,2-di-(4-oxyphenyl)ethylene (C-2) and Na₂S*9H₂O (sodium sulfide nanohydrate) in a medium of N,N-dimethylacetamide at a temperature of 160-165°C in the presence of an alkaline agent. The molar ratio of C-2 and Na₂S*9H₂O is from 99:1 to 1:99. The values of n, m and z are such that the resulting reduced viscosity of halogen-containing aromatic copolyester sulfide sulfones is 0.5-0.7 dg/g.

EFFECT: creation of new polyesters with increased thermal and mechanical characteristics, as well as fire resistance, resistant to various external conditions.

1 cl, 1 tbl, 7 ex