| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane foam that has a low density, is good in hardness and thermoformability, can suppress discoloration and excels in water repellency. SOLUTION: The polyurethane foam is obtained by reacting a polyurethane foam raw material containing a polyol, a polyisocyanate, a foaming agent and a catalyst, and foaming and curing it. The polyol comprises a polymer polyol obtained by the graft polymerization of a vinyl monomer onto a polyether polyol, a polyether polyol with a mol.wt. of 400-1,000 obtained by the addition polymerization of an aklylene oxide to a polyhydric alcohol, and a polyol derived from vegetable oil. Further, the polyurethane foam raw material contains a hydrate of an inorganic compound. It is preferable that the polyol further contains a polyether polyol with a mol.wt. of 2,000-4,000 obtained by the addition polymerization of an alkylene oxide to a polyhydric alcohol. COPYRIGHT: (C)2008,JPO&INPIT |
