| 摘要 |
PURPOSE:To obtain the subject foaming composition for producing polyurethane foam, excellent in stability by using a mixture composed of trichlorofluoromethane, an aliphatic hydrocarbon, dichlorotrifluoroethane, etc., as a foaming agent component and adding a specified stabilizer thereto. CONSTITUTION:The objective composition is obtained by using (A) a mixture composed of (i) 1 to 12wt.% (preferably 8 to 12wt.%) aliphatic hydrocarbon (preferably i-pentane) having 20 to 50 deg.C boiling point, (ii) 30 to 60wt.% (preferably 40 to 50wt.%) dichlorotrifluoroethane or dichloromonofluoroethane (preferably 1,1-dichloro-2,2,2-trifluoroethane) and (iii) trichlorofluoromethane as the remainder component as a foaming agent component and adding (B) 0.1 to 5wt.% alkenyl-containing compound (preferably isopropenyltoluene) having one or more double bonds thereto. |
