Polyurethane foam, its production and use process, process for reducing the thermal conductivity of polyurethane foams and use of polyether -siloxane copolymers of formula I for the production of polyurethane foams

摘要

The present invention refers to a process for the production of polyurethane foam by reacting to at least one polyol component with at least one isocyanate component in the presence of at least one expansion agent and one or more catalysts, which catalyse the isocia reactions Polyol -nate and /or isocyanate -water and /or trimerisation of isocyanate, the reaction being performed in the presence of substituted polyether -siloxane copolymers.