Polyether and methods for preparing polyether for polyurethane synthesis

The invention relates to polyether alcohols, a process for preparing polyether alcohols by reaction of alkylene oxides with at least one saturated, optionally already reacted with an alkylene oxide OH component in the presence of a double metal cyanide (DMC) catalyst, wherein an antioxidant is added before or during the reaction, and the further processing of the polyether alcohols to form polyurethanes.