Patent ID: 7339005

Claim:
A process for producing a both end-modified diene polymer rubber comprising the steps of: (1) polymerizing a conjugated diene monomer or a combination thereof with an aromatic vinyl monomer in the presence of a compound represented by the following formula (1) to produce an alkali metal end-carrying active polymer, and (2) reacting the alkali metal end-carrying active polymer with an amine compound, a ketone compound, an acrylamide compound or a silyl compound represented by the following formulas (2), (3), (4) and (6), respectively, R—(CH 2 ) n —X-M (1) wherein, in the formula (1), R is a functional group containing a substituent group-carrying nitrogen atom, X is a saturated or unsaturated hydrocarbon group comprising from 0 to 10 conjugated diene monomer units or aromatic vinyl monomer units, n is an integer of from 1 to 10, and M is an alkali metal; in the formula (2), each of R 1 , R 2 and R 3 is independently of each other an alkyl group having from 1 to 8 carbon atoms, R 4 is an alkoxy or alkyl group having from 1 to 8 carbon atoms, and a is an integer of from 1 to 8; in the formula (3), R 5 is selected from the group consisting of methyl, ethyl, propyl, and butyl, and R 6 is selected from the group consisting of morpholino, imidazolyl, pyrazolyl, oxazolyl, thiazolyl, pyridinyl, pyrimidinyl, and pyrazinyl; in the formula (4), R 7 is hydrogen or a methyl group, each of R 8 and R 9 is independently of each other an alkyl group, and p is an integer of from 1 to 10; and, in the formula (6), R 11 is an alkyl group having from 1 to 4 carbon atoms, a cycloalkyl group, a phenyl group or a benzyl group, each of R 12 and R 13 is independently of each other an alkyl group having from 1 to 4 carbon atoms, an alkoxy group, an alkoxyalkyl group, a cycloalkyl group, a phenyl group or a benzyl group, q is an integer of from 0 to 1, r is an integer of from 1 to 5, and Z is a halogen or a vinyl group.