| 摘要 |
<p>A process for preparing rigid polyurethane foam in which the major ingredients are a polyisocyanate, a polyol having more than three hydroxy groups and a hydroxyl value greater than 100, and blowing agents, comprising adjusting the ratio of the chemical equivalent of polyisocyanate to the polyol and blowing agent which react with the polyisocyanate to the range between 2 : 1 and 1 : 1, and adding a polymer of glucose and/or a derivative thereof in the form of a powder in the amount exceeding 5% by weight.</p> |
