FIELD: chemistry.
SUBSTANCE: copolyether contains an acid component (A) and at least one diol component (B). The acid component consists of 1) 50-60 mol % aromatic polyfunctional acid and 2) 40-50 mol % aliphatic acid, where 90 mol % comprises a natural long-chain dicarboxylic acid selected from azelaic acid, sebacic acid, brassilic acid or mixtures thereof. The invention enables to obtain biodegradable polyether which has over 70% biodegradability after 90 days, density equal to or less than 1.2 g/cm3, average molecular weight 40000-140000, characteristic viscosity 0.8-1.5.
EFFECT: improved characteristics of polyethers.
23 cl, 4 tbl, 9 ex
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