FIELD: chemistry.
SUBSTANCE: invention relates to chemistry, particularly polyetherurethane compositions based on polyethers and can be successfully used to insulate inner surfaces of drill pipes from asphalt-gum, paraffin and salt deposits during oil and gas extraction. The polyetherurethane is obtained by mixing a hydroxyl-containing fatty-aromatic polyether with terminal hydroxyl groups and molecular weight of 1002, modified by vinyl links with a polyfunctional isocyanate and an additional cross-linking component - bis-monotetrapropanol-2-urea, obtained through direct oxypropylation of carbamide, with the following ratio of components, pts.wt: fatty-aromatic modified polyether 100, bifunctional polyisocyanate 22-25 and bis-monotetrapropanol-2-urea 2.5-3.0.
EFFECT: low level of toxicity, high hydrolytic stability and shorter time for coating.
2 cl, 2 ex
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