| abstract |
(57) [Summary] [PROBLEMS] To have high hardness, and even with high hardness, excellent kneading workability, extrusion workability, roll workability, and also excellent tensile strength, compression set, etc. To provide an ethylene-α-olefin-non-conjugated diene copolymer composition. SOLUTION: (A) Ethylene-α-olefin having a weight ratio of ethylene / α-olefin of 40/60 to 70/30, an iodine value of 1 to 50, a Mooney viscosity of 0 to 160, and a weight average molecular weight of 10,000 to 1,000,000. A non-conjugated diene copolymer, (B) Weight ratio of ethylene / α-olefin 70 / 30- 90/10, iodine value 1-50, Mooney viscosity 0-16 0, ethylene-α having a weight average molecular weight of 10,000 to 1,000,000 An olefin-non-conjugated diene copolymer, (A) / (B) weight ratio 30 / 70-70 / 30, ethylene / α-olefin weight ratio 50 / 50-70 / 3 0, the melting point of the crystalline portion composed of ethylene chains measured by DSC is 30 ° C. or higher, the iodine value is 5 to 40, and the Mooney viscosity is 2. 0 to 150, an ethylene-α-olefin-nonconjugated diene copolymer composition. |