| abstract |
The present invention relates to a rigid polyurethane foam for a discontinuous production process and a polyurethane composite panel, as well as use of the rigid polyurethane foam in insulation. The rigid polyurethane foam is made from a reaction system comprising an isocyanate component and a polyol component, wherein the polyol component includes at least one long-chain polyether polyol having a functionality of 2 and a number average molecular weight of 1800 to 4000, blowing agents, catalysts etc.. The polyurethane foam of the present invention has unexpectedly satisfactory dimensional stability and adhesion strength, as well as other good physical properties. |