METHOD FOR PRODUCING POLYOLS AND THEIR APPLICATION FOR PRODUCING POLYURETHANES

摘要

1. The method of producing polyols of base-catalyzed addition of alkylene oxides containing at least 10 wt.% Ethylene oxide to multifunctional initiating compounds with hydrogen atoms active in the Cerevitin reaction in the presence of catalysts based on alkali metal hydroxides, alkali metal hydrides, alkaline earth metal hydrides, alkaline carboxylates metals, alkaline earth metal carboxylates or alkaline earth metal hydroxides, the concentration of which is from 0.004 to 0.5 wt.% in in terms of the amount of the final product, and the neutralization of the alkaline polymerization centers of the crude alkylene oxide addition product is carried out by the supply of sulfuric acid, which is implemented in such a way that to neutralize the amount of catalyst contained in the crude polymer, 66 to 100 mol% of the acid used in only the first stage of dissociation is used. ! 2. The method according to claim 1, wherein before or during the addition of alkylene oxides, 10 to 80 wt.% Triglycerides are added, calculated on the amount of the final product. ! 3. The use of polyols, which can be obtained according to claim 1 or 2, for the synthesis of polyurethanes.