| 摘要 |
PROBLEM TO BE SOLVED: To provide a soft polyurethane foam excellent in discoloration resistance, moldability, curability and mechanical properties, and scarcely deteriorating the work environment.SOLUTION: The soft polyurethane foam is obtained by reacting, foaming and curing a mixed liquid of (A) an organic polyisocyanate, (B) a polyol, (C) a catalyst, (D) a foaming agent and (E) a foam stabilizer, wherein: the organic polyisocyanate component (A) is a mixture of an allophanate-modified organic polyisocyanate composition (A1) composed of a monool and an aliphatic and/or alicyclic diisocyanate, and an allophanate-modified organic polyisocyanate composition (A2) composed of an alcohol containing two or more hydroxyl groups and an aliphatic and/or alicyclic diisocyanate; and the number of average functional groups of the isocyanate component is 2.8 to 4.3. |
