COPOLYMER OF CONJUGATED DIENE COMPOUNDS AND NON-CONJUGATED OLEFINS, RUBBER COMPOSITION, CROSS-LINKED RUBBER COMPOSITION, AND TYRE

In a copolymer of a conjugated diene compound and a non-conjugated olefin, the conjugated diene unit has a cis-1,4 bond content of greater than 70.5 % and the non-conjugated olefin is contained in an amount of 10 mol% or more.