SIMPLE POLYESTERS OF COMPLEX POLYEFIRPOLIOLS AND THEIR APPLICATION FOR OBTAINING HARD POLYURETHANES Russian patent published in 2017 - IPC C08G18/28 C08G18/48 C08G18/72 

FIELD: chemistry.

SUBSTANCE: polyester of a polyester polyol is described, it has a reaction product of a1) between 20 and 50 wt % of one or more polyols with an average functionality of 2.5 to 8, a2) 5 to 30 wt % of one or more monoesters of fatty acids, a3) 35 to 50 wt % of one or more alkylene oxides having from 2 to 4 carbon atoms, characterized in that the polyols of component a1) are selected from the group consisting of sugars, pentaerythritol, sorbitol, trimethylolpropane, glycerol, ethylene glycol, propylene glycol and water; fatty acid monoester of component a2) is selected from the group consisting of monoesters of oleic acid, stearic acid, palmitic acid and linolenic acid; and the polyether polyester polyol has an OH number of 200 to 700 mg KOH/g. A process of preparation of rigid polyurethane foams in the presence of the above polyether of polyester polyol is also described. A polyol mixture is described for the preparation of rigid polyurethane foams comprising the above polyester of polyester polyol.

EFFECT: preparation of a polyol component for the production of rigid polyurethane foams having high solubility for physical foaming agents and being phase-stable.

11 cl, 2 tbl, 11 ex