HALOGEN CONTAINING OLIGOESTER SULPHONES AND METHOD OF OBTAINING THEM Russian patent published in 2008 - IPC C08G75/23 C07C315/04 C07C317/22 

FIELD: chemistry.

SUBSTANCE: invention pertains to aromatic oligoester sulphones , where n= 1-20, as well as to the method of obtaining them through converting bisphenol 1,1 - dichloro-2,2-di(3,5-dibromo-n-oxyphenyl)ethylene to a disodium salt by reaction with an alkaline solution, distillation of water with toluol at 140°C, reaction on the second stage with 4,4'-dichlorodiphenylsulphone in an aprotonic dipolar solvent - dimethylsulfoxide at 130-140°C for 2 hours.

EFFECT: wider assortment of oligomers for obtaining soluble block-copolyestersulphones with high viscosity and fire-resistance.

2 cl, 4 ex