| 摘要 |
<p>An ethylene/α-olefin/unconjugated polyene copolymer rubber which is obtained from ethylene, a C3-20 α-olefin, and an unconjugated polyene and has the following properties; and a sealing rubber composition and a sealing molded rubber both containing the copolymer rubber. (i) The intrinsic viscosity [θ] as measured in a 135°C decalin solvent is 1.5 to 5.0 dl/g. (ii) The value gθ* or g' as defined in the description is 0.6 to 0.9. (iii) The Mw/Mn is from 3.0 to 50. (iv) The iodine value is 10 to 40. (v) The molar ratio of ethylene to the C3-20 α-olefin is from 40/60 to 95/5. (vi) The ratio D of Tαβ intensity to Tαα intensity in a 13C-NMR spectrum is 0.5 or lower.</p> |
