| 摘要 |
A polybutadiene having a hydroxyl group at a terminal end thereof is reacted with a lactone compound such as an µ-caprolactone to obtain a polymer polyol represented by formula (I): HO-X 1 -Y-X 2 -OH (wherein X 1 and X 2 each independently represents a polyester component and Y represents a polybutadiene component), the polymer polyol is reacted with an unsymmetric diisocyanate to obtain a urethane prepolymer, and then the urethane prepolymer is reacted with a chain extender to obtain a polyurethane. |
