abstract |
The present invention relates to a process for the production of at least one polyol component which comprises reacting at least one isocyanate component with at least one blowing agent and at least one catalyst which catalyzes isocyanate-polyol and / or isocyanate-water reaction and / or isocyanate trimerization Wherein the reaction is carried out in the presence of a selected polyether-siloxane copolymer. |