process for preparing rigid polyurethane foams or rigid polyisocyanurate foams, rigid polyurethane or polyisocyanurate foam, use of rigid polyurethane or polyisocyanurate foam, and polyol component

摘要

1/1 summary “process for preparing rigid polyurethane foams or rigid polyisocyanurate foams, rigid polyurethane or polyisocyanurate foam, use of rigid polyurethane or polyisocyanurate foam, and The polyol component of the present invention relates to a process for producing rigid polyurethane foams or rigid polyisocyanurate foams using certain polyether ester esters (b) based on aromatic dicarboxylic acids, optionally additional polyester polyols (c), other than component (b) polyols, and polyester (d) polyols, wherein the mass ratio of the sum of components (b) and, if applicable, (c) for component (d) is less than 1.6. The present invention also relates to the rigid foams obtainable in this manner and the use thereof to produce sandwich elements with rigid or flexible cover layers. The present invention additionally relates to basic polyol components.