| 摘要 |
PURPOSE:To improve the heat fusibility, by using a mixed polyol of a specific high-molecular weight polyol and specific low-molecular weight polyol in a specified proportion as a polyol in obtaining a nonrigid polyurethane foam from the polyol and a polyisocyanate compound. CONSTITUTION:A mixed polyol consisting of 70-98wt%, preferably 80-97wt% high-molecular weight polyol, preferably a polyether polyol (modified polyether polyol) having 30-70, preferably 35-60 hydroxyl number, preferably polyoxypropylene triol and 2-30wt%, preferably 3-20wt% polyhydric alcohol-(epsilon- caprolactone) adduct based, preferably trimethylolpropane-(epsilon-caprolactone)adduct based or polyhydric phenol-(alkylene oxide) adduct based, preferably bisphenol A-(propylene oxide) adduct based low-molecular weight polyol having 150-600, preferably 250-600 hydroxyl number is reacted with a polyisocyanate compound, preferably tolylene diisocyanate, in the presence of a catalyst, foaming agent or foam stabilizer to afford the aimed polyurethane foam.
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