Use of polyol mixtures in rigid and semi-rigid polyurethane foams

摘要

The present invention relates to a mixture of polyols for use in the preparation of polyurethane foam comprising: (i) 80-99% by weight of at least one polyether polyol and/or at least one polyester polyol; and (ii) 1-20% by weight of at least one polyolefin polyol. The invention further relates to a process for preparing polyurethane foams, using the said mixture of polyols; to polyurethane foams obtainable by such process; and to articles and composites containing the said polyurethane foams.