A METHOD FOR PRODUCING LOW UNSATURATION LEVEL OXYALKYLATES, AN OXYALKYLATE, A USE THEREOF AND A POLYURETHANE FOAM

A method for producing low unsaturation level oxyalkylates, characterised in that it comprises the steps of:a. preparation of an initial feed containing the first starter and a double metal cyanide type (DMC) catalyst, wherein the initial feed is dried and heated to a reaction temperature from 115 to 145 °C;b. activation of the DMC catalyst by dosing to the initial feed an alkylene oxide or alkylene oxides mixture in an amount from 5 to 20% by weight of the initial feed;c. polyaddition of alkylene oxide or alkylene oxides mixture to a first starter in the presence of an activated DMC catalyst, wherein a low molecular weight second starter with a functionality lower than the first starter is simultaneously dosed together with the alkylene oxide stream or alkylene oxides mixture; wherein under the reaction conditions the polyaddition of the alkylene oxide or alkylene oxides mixture occurs simultaneously to the first starter from the initial feed and to the low molecular weight second starter;d. heating the mixture of oxyalkylates at reaction temperature until constant pressure is achieved, and subsequently conducting degassing process to remove volatiles.