METHOD OF PRODUCING POLYOLS AND USE THEREOF IN PRODUCING POLYURETHANES Russian patent published in 2013 - IPC C08G65/26 C08G65/28 C08G65/46 C08G18/42 C08G18/44 C08G18/48 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polyols used in synthesis of polyurethanes. The method involves reacting alkylene oxides, which contain at least 10 wt % ethylene oxide, with multifunctional initiating compounds with hydrogen atoms that are active in a Zerewitinoff reaction in the presence of a catalyst, concentration of which ranges from 0.004 to 0.5 wt %, with respect to the amount of the end product. The catalyst used is in form of catalysts based on alkali metal hydroxides, alkali metal hydrides, alkali-earth metal hydrides, alkali metal carboxylates, alkali-earth metal carboxylates or alkali-earth metal hydroxides. Neutralisation of alkaline polymerisation-active centres of the raw product of alkylene oxide addition is carried out by adding sulphuric acid in such a manner that the amount of catalyst contained in the raw polymer is neutralised by 66-100 mol % of the used acid of only the first dissociation step.

EFFECT: providing a method of producing polyols used in synthesis of polyurethanes.

3 cl, 1 tbl, 13 ex