PROCESS FOR PRODUCING A RIGID POLYURETHANE-POLYISOCYANURATE FOAM

摘要

The invention provides a process for producing rigid polyurethane-polyisocyanurate foams using polyols having a high proportion of secondary hydroxyl end groups. The invention further relates to the rigid polyurethane-polyisocyanurate foams thus obtainable and to the use thereof in the production of composite elements from the rigid polyurethane-polyisocyanurate foams and suitable outer layers. The invention further provides the composite elements thus obtainable.