| abstract |
The present invention provides a copolymer rubber having little impurities contained in the copolymer rubber, and having excellent kneading processability, extrusion processability, and shape retention property, and a rubber composition comprising the same, and obtained from the rubber composition, which have surface appearance, strength characteristics, It is to provide a rubber molded article having excellent heat aging resistance and weather resistance and small compression set. The copolymer rubber of the present invention has one double bond between adjacent carbon atoms polymerizable by ethylene [A], α-olefin [B] having 3 to 20 carbon atoms, and a metallocene catalyst in one molecule. It comprises a nonconjugated polyene [C] and a structural unit derived from the nonconjugated polyene [D] which has two said double bonds in 1 molecule, Comprising: It is characterized by satisfy | filling specific requirements (1)-(5). . |