| 摘要 |
<p>Provided is a railroad rail track pad obtained by crosslinking a composition containing an ethylene / alpha-olefin / non-conjugated polyene random copolymer which includes structural units of ethylene [A], C3-20alpha-olefin [B], and a non-conjugated polyene [C-1] containing one of the structures of formulae (I) and (II) [formula (I) is partial structure of a cyclic olefin], and a non-conjugated polyene [C-2] containing two or more of structures of formulae (I) and (II), and which fulfills (1) [B] is a 10-50 mol%, (2) the total of [C-1] and [C-2] is 1.0-6.0 mol%, (3) [C-1]/[C-2] is 75/25 to 99.5/0.5, (4) ML1+4(100°C) is 10-90, (5) the iodine value of [C-2] is 0.1-3.0g/100g, and (6) 50 > flow activation energy (Ea) > 35.</p> |
