| abstract |
(57) [Summary] [Constitution] A specific medium molecular weight ethylene / α-olefin / polyene copolymer (A) having an intrinsic viscosity of 0.9 to 2.0 dl / g and an intrinsic viscosity of 0.03 dl. Specific low-molecular weight ethylene / α-olefin copolymer (B) of not less than / g and less than 0.9 dl / g, or homo-low molecular weight polymer or low-molecular weight copolymer of α-olefin having 6 to 18 carbon atoms or The intrinsic viscosity of these hydrogenated products is 0.03 dl / g or more and contains a specific low molecular weight (co) polymer (C) of less than 0.9 dl / g, and contains (A) component and (B) or Weight ratio with component (C) [(A) / (B) or (C)] 95 / 5-40 / 60, and a high-fluidity rubber composition for injection molding or molding (foam). [Effect] The above rubber composition can provide a molded article (foam) excellent in vulcanization physical properties such as heat resistance, weather resistance, ozone resistance, and tear strength, and further, transfer molding, injection molding, etc. In the injection molding and mold molding, there is an effect of being excellent in precision moldability and productivity. |