METHOD OF OBTAINING POLYESTERPOLYOLS WITH TERMINAL SECONDARY HYDROXYL GROUPS Russian patent published in 2015 - IPC C08G18/42 C08G63/18 C08G63/66 C08G63/87 C08G63/91 

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining polyesterpolyols with terminal secondary hydroxyl groups, including stage of interaction of polyester, containing terminal carboxyl groups of polyester with epoxide of general formula (1), in which R1 stands for alkyl or aryl residue, and interaction is carried out in presence of catalyst with at least one nitrogen atom in molecule, where polyester containing terminal carboxyl groups, which possesses acid number from ≥ 25 to ≤ 400 mg KOH/g and hydroxyl number ≤ 5 mg KOH/g, is obtained with application of from ≥ 1.03 to ≤ 1.90 mol of carboxyl groups or equivalents of carboxyl groups of acid component per mole of alcohol hydroxyl groups.

EFFECT: invention relates to polyesterpolyols with terminal secondary hydroxyl groups and to composition based on polyesterpolyol, intended for obtaining polyuretanes, as well as to polyurethane polymer, obtained by conversion of poly-isocyanate with polyesterpolyol or composition based on complex polyesterpolyols.

14 cl, 4 tbl, 2 ex