Patent ID: 9266978
Filing Date: 2016-02-23
CPC Classification: C08F

Claim Text:
1. A method of manufacturing a copolymer, the method comprising copolymerizing a conjugated diene compound and an olefin other than the conjugated diene compound in the presence of a polymerization catalyst composition, the polymerization catalyst composition containing: component (A): a rare earth element compound or a reactant of the rare earth element compound and a Lewis base, with no bond formed between the rare earth element and carbon; and component (B): an aluminoxane (B-2), wherein as the component (A), the rare earth element compound or the reactant of the rare earth element compound and the Lewis base is represented by the following general formula (III): where M represents a lanthanoid element, scandium, or yttrium; X each independently represents a bistrialkylsilyl amide group; L represents a Lewis base; and w represents 0 to 3.