| 摘要 |
PROBLEM TO BE SOLVED: To obtain polyurethane foam having integral skin by using water as a foaming agent and using a particular polyol component.SOLUTION: Polyoxyalkylene polyol having a hydroxyl value at 20 to 80, a hydroxyl number at 2 to 8, and a CPR value at 5 to 200, a chain extender, and a polyisocyanate compound are reacted under the presence of a catalyst and a foaming agent to manufacture polyurethane foam with skin. It is preferable that the CPR value of polyoxyalkylene polyol be 10 to 150, the hydroxyl value of polyoxyalkylene polyol be 20 to 60, and the hydroxyl number be 2 to 4. |
