Patent ID: 8106130

Claim:
A modified conjugated diene polymer represented by the following general formula (1), (2), (3), or (4), comprising a modifying group based on a low molecular weight compound having two or more tertiary amino groups and one or more alkoxysilyl groups in a molecule which bonds to a conjugated diene polymer obtained by polymerization of a conjugated diene compound or a conjugated diene polymer obtained by copolymerization of a conjugated diene compound and an aromatic vinyl compound, wherein P represents the conjugated diene polymer; R 1 and R 2 , which may be the same or different from each other, represent a hydrocarbon group having 1 to 12 carbon atoms, which may contain an unsaturated bond; R 3 represents a hydrocarbon group having 1 to 20 carbon atoms, which may contain an unsaturated bond; R 4 , R 5 , R 6 , and R 7 , which may be the same or different from each other, represent a hydrocarbon group having 1 to 20 carbon atoms, which may be substituted with an organic group containing Si, O, or N and not containing an active hydrogen, and which may contain an unsaturated bond; f is an integer of 1 to 2, d is an integer of 1 to 2, and e is an integer of 0 to 1, provided that d+e+f=3, wherein P, R 1 , R 3 , R 4 , d, e, and f are the same as defined in the general formula (1), R 8 and R 9 , which may be the same or different from each other, represent an aliphatic hydrocarbon group having 1 to 6 carbon atoms, which may contain an unsaturated bond; and R 10 represents a hydrocarbon group having 1 to 20 carbon atoms, which may be substituted with an organic group containing Si, O, or N and not containing an active hydrogen, and which may contain an unsaturated bond, wherein P, R 3 , R 4 , R 7 , d, e, and f are the same as defined in the general formula (1); R 8 and R 10 are the same as defined in the general formula (2); and R 11 represents a hydrocarbon group having 1 to 6 carbon atoms, wherein P, R 3 , R 5 , and R 6 are the same as defined in the general formula (1); R 12 and R 13 , which may be the same or different from each other, represent a hydrocarbon group having 1 to 12 carbon atoms, which may contain an unsaturated bond; and R 14 and R 15 , which may be the same or different from each other, represent a hydrocarbon group having 1 to 20 carbon atoms, which may be substituted with an organic group containing Si, O, or N and not containing an active hydrogen, and which may contain an unsaturated bond.