Patent ID: 6846873

Claim:
An end-modified diene copolymer prepared from a conjugate diene polymer or a copolymer comprising at least one conjugate diene compound and a vinyl-substituted aromatic compound, the conjugate diene polymer or the copolymer being obtained by polymerization using an organic lithium initiator in the presence of a non-polar solvent, the end-modified diene copolymer being prepared by modifying the active end of the conjugate diene polymer or the copolymer with at least one polysiloxane compound represented by the following formula 1, Y—{C(R 3 )(R 4 )} c —Si(R 1 )(R 2 )—{O—Si(R 1 )(R 3 )} d —{C(R 3 )(R 4 )} c —Y, in which: Y represents (X) a (R) b Si, (X) a (R) b C or (X) e (R 1 ) f Bz-X; X represents a halogen atom selected from the group consisting of F, Cl, Br or I; R represents a lower alkyl group containing 1 to 20 carbon atoms, including a methyl group, an ethyl group or a propyl group; R 1 , R 3 and R 4 are same or different from one another and are selected from a hydrogen atom, a lower alkyl group 1 to 20 carbon atoms, a halogen-substituted alkyl group, or a halogen-substituted silane group; R 2 is the same as X or R 1 , or represents (X) g (R 3 ) h C—{C(R 3 )(R 4 )} c-1 ; a is 1 to 3; b is 0 to 2, wherein a+b=3; c is 1 to 1,000; d is 1 to 50,000; e and f are independently 0 to 4, wherein e+f=4; g and h are independently 0 to 3, wherein g+h=3; and Bz-X represents benzyl halogen.