POLYESTERPOLYOLS HAVING SECONDARY ALCOHOL GROUPS AND USE THEREOF IN SYNTHESIS OF POLYURETHANES, SUCH AS FLEXIBLE FOAMED POLYURETHANES Russian patent published in 2011 - IPC C08G63/664 C08G63/685 C08G18/68 C08G101/00 C08J9/06 

FIELD: chemistry.

SUBSTANCE: invention relates to polyesters which are used in synthesis of flexible foamed polyurethanes. Copolyester - a liquid at 50°C - has (a) an initiator segment which is a polyether with molecular weight between 300 and 1500 and at least two hydroxyl groups, and (b) at least three ester links per molecule of copolyester on average, where the said links are from a hydroxyl-containing fatty acid which contains 7 or more carbon atoms, or a mixture of two or more of the said fatty acids. The fatty acids contain a secondary hydroxyl which lies at least five carbon atoms from the carbonyl carbon atom of the acid group of the fatty acid and a primary hydroxyl with one or more hydroxymethyl groups. The copolyester contains 3.5-10 ester links per total number of hydroxyl, primary amine and secondary amine groups of the initiator compound.

EFFECT: invention enables to obtain a polyester with high functionality and low sensitivity to the level of an organotin catalyst used in synthesis of foamed polyurethane.

9 cl, 4 tbl, 17 ex