| 摘要 |
PURPOSE:To obtain a polyurethane useful for rigid polyurethane foams excellent in packability, thermal insulation and low-temperature dimensional stability, by using a polyisocyanate component and a specific tertiary aminoalcohol as part of a polyol component. CONSTITUTION:The objective polyurethane can be obtained by using (A) a polyisocyanate component such as tolylene diisocyanate and (B) a polyol component such as polyester polyol. In this case, as at least part of the component B, pref. 1-50wt.% of a tertiary aminoalcohol of the formula (R1 is 2-24C alkylene, cycloalkylene, arylene, aralkylene, etc.; R2 is 1-9C alkylene; R3 and R4 are each 1-4C alkyl; n is 1-50) is used. |
