| abstract |
(57) Abstract: A rubber composition, in which fracture characteristics, abrasion resistance and low heat build-up are simultaneously maintained at a high level, a polymer used for the rubber composition, And a method for producing the same. A conjugated diene monomer is polymerized or copolymerized in a hydrocarbon solvent by using an organolithium compound as an initiator, and the polymerized active terminal is represented by the formula (1). A method for producing a modified diene polymer characterized by reacting a cyclic amine compound containing an amidino group derivative, a resulting polymer, and a rubber composition using the polymer. |