申请人:YAMAHA CORPORATION
公开号:EP2860208A1
公开(公告)日:2015-04-15
According to the present invention, a urethane foam rubber is constituted with a polymer having a moiety derived from a diisocyanate, and a moiety derived from a polyether polyol, number of atoms composing the shortest path along a bond intervening two NCO groups in at least a part of the diisocyanate is no less than 11, Mw of the polyether polyol is no less than 1,000 and no greater than 4,000, and the polymer exhibits at least one of the following features (i) to (iii): (i) having moieties derived from two or more types of the polyether polyols that are each different in terms of at least one of a weight average molecular weight and an oxyalkylene unit; (ii) having the moiety derived from the polyether polyol that includes two or more types of oxyalkylene units; and (iii) further having a moiety derived from a tri- or higher multi-functional isocyanate.
根据本发明,聚氨酯泡沫橡胶是由聚合物构成的,该聚合物具有衍生自二异氰酸酯的分子和衍生自聚醚多元醇的分子,构成二异氰酸酯至少一部分中两个 NCO 基团之间键的最短路径的原子数不小于 11,聚醚多元醇的 Mw 不小于 1,000 且不大于 4,000,并且该聚合物具有以下特征(i)至(iii)中的至少一个:(i) 具有衍生自两种或两种以上类型的聚醚多元醇的分子,这些聚醚多元醇在重量平均分子量和氧亚烷基单元中至少有一个是不同的;(ii) 具有衍生自聚醚多元醇的分子,该分子包括两种或两种以上类型的氧亚烷基单元;以及 (iii) 进一步具有衍生自三官能团或更高官能团异氰酸酯的分子。