| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rigid polyurethane foam composition capable of forming fine cells with improved heat insulation property suppressing radiation of the foam even by an application of a foaming agent with very little environmental destruction. <P>SOLUTION: The rigid polyurethane foam composition is composed of at least a polyisocyanate (a), a polyol (b) and a foaming agent, wherein the polyol (b) contains at least a polyester polyol and prepared by addition of 0.05-10 pts.wt. of an organic modified montmorillonite to 100 pts.wt. of the polyol (b). Thus, numerous fine cells can be formed by suppressing increase of the cell size and coalescence of cells. The resultant rigid polyurethane foam becomes fine cells without change of another raw material, facility or the like and gives excellent insulation property by improving a coefficient of thermal conductivity through suppressing radiation. <P>COPYRIGHT: (C)2011,JPO&INPIT |
