| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preparing soling polyurethane foams having sufficient strength, hardness and flexing resistance and, in addition, excellent in dimensional stability, solvent resistance and external appearance. SOLUTION: A method for preparing a soling polyurethane foam having a density of its molded product of 0.2-1.0 g/cm3 and a C hardness of 35-90 comprises reacting (A) a polyol composition containing a polyol component of a polyoxypropylene glycol A having a degree of unsaturation of not less than 0.6 meq/g which is obtained by using a compound having two hydroxyl groups as the starting material and a polyoxypropylene polyol B which is obtained by using a compound having three or more hydroxyl groups as the starting material at a weight ratio (polyoxypropylene glycol (A) to polyoxypropylene polyol (B) of 4-100, a catalyst and water with (B) a polyisocyanate compound. |
