| abstract |
A composition is disclosed for preparing rigid polyurethane foams comprising at least one isocyanate component, a polyol component, optionally a catalyst catalyzing the formation of urethane or isocyanurate linkages, wherein the composition is a blowing agent 3, 4 or hydrocarbons having 5 carbon atoms, hydrofluorocarbons, hydrofluoroolefins (HFOs), hydrohaloolefins, oxygen-containing blowing agents and/or chlorohydrocarbons, and also acrylates and/or as foam stabilizers or a methacrylate copolymer. |