POLYISOCYANATE COMPOSITION FOR RIGID POLYURETHANE FOAM MADE BY FOAMING USING CYCLOPENTANE, AND METHOD FOR PRODUCING RIGID POLYURETHANE FOAM BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a rigid polyurethane foam by using a raw material having excellent storage stability, suitable for a foaming system using cyclopentane and water, which is friendly to the global environment, and providing the rigid polyurethane foam having good thermal conductivity characteristics.;SOLUTION: The polyisocyanate composition for the cyclopentane-foamed rigid polyurethane foam contains an isocyanate group-containing prepolymer formed by reacting a polymeric MDI (A1) with a low-molecular weight polyol (A2) having a side-chain alkyl group and ≥4 number of the whole carbons of the side chain.;COPYRIGHT: (C)2009,JPO&INPIT