| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hard polyurethane foam which is low density and excellent in foam appearance, dimensional stability, and compressive strength in spite of using water as a blowing agent. <P>SOLUTION: By the production of a polyurethane under the conditions, wherein a specific amount of a specific polyol in a polyol component is used, a specific amount of water as a blowing agent is used, a specific amount of an interconnecting agent is used, even if not making density high, the hard polyurethane foam excellent in foam appearance, dimensional stability, and compressive strength can be produced. <P>COPYRIGHT: (C)2009,JPO&INPIT |
