| abstract |
The invention relates to a process for the preparation of polyetherols by catalyzed addition of alkylene oxides to starting substances, with at least one tertiary amine catalyst in an amount of 0.1 to 5% by weight, based on that, for the reaction of the starting substances with alkylene oxides as catalysts Total weight of the polyetherol, and at least one basic catalyst based on alkali / alkaline earth metals in an amount of 0.01 to 0.25% by weight, based on the total weight of the polyetherol, are used, the weight ratio of the tertiary amine catalysts used the basic catalysts based on alkali / alkaline earth metals is 1 to 0.002 to 1 to 2.5. The invention further relates to the polyetherols themselves and their use for the production of polyurethanes. |