| 摘要 |
PROBLEM TO BE SOLVED: To provide a foam urethane rubber having a high rebound coefficient, further having low hardness and low tanδ, and also capable of exhibiting these characteristics to a low temperature region.SOLUTION: Provided is a foam urethane rubber made of a polymer having a part derived from di-isocyanate and a part derived from a polyether-based polyol, in which the atomic number composing the shortest coupling path between two NCO groups at least in a part of the diisocyanate is 11 or higher, and Mw of the polyether based polyol is 1,000 to 4,000. The foam urethane rubber satisfies at least any among (i) that the polyether based polyol includes at least any mutually different two kinds the Mw and oxyalkylene units, (ii) that the polyether based polyol includes two or more kinds of oxyalkylene units, and (iii) that the polymer further includes a part derived from 3 or more functional isocyanate. |
