Patent ID: 8039565

Claim:
A copolymer of at least one conjugated diene and at least one alpha-olefin having from 3 to 18 carbon atoms, wherein said copolymer fulfils the following conditions: the number-average molecular mass of said copolymer is greater than 60,000 g/mol, said copolymer comprises units resulting from said conjugated diene(s) in a molar content of greater than 40% and less than or equal to 90%, and units resulting from said alpha-olefin(s) in a molar content of less than 60% and greater than or equal to 10%, said units resulting from said conjugated diene(s) have a trans-1,4 linkage content of greater than 70%, said copolymer is devoid of cyclic units, and said copolymer is such that each unit resulting from said alpha-olefin(s) is inserted in the chain of said copolymer between two units resulting from said or each conjugated diene.