Patent ID: 8952101
Filing Date: 2015-02-10
Classification: B60C,C08C,C08L

Abstract:
1. A conjugated diene rubber comprising: such a structure that not less than 3 conjugated diene polymer chains are bound to each other via a denaturing agent, an amount of the structure in the conjugated diene rubber being not less than 5% by weight, the structure being obtained by causing the not less than 3 conjugated diene polymer chains and the denaturing agent to be reacted with each other, each of the not less than 3 conjugated diene polymer chains having (i) at least one of terminals which is an isoprene block having not less than 70% by weight of an isoprene monomer unit, (ii) the other one of terminals which is an active terminal, and (iii) a part other than the isoprene block having 0% by weight or more but less than 70% by weight of an isoprene monomer unit, each of the not less than 3 conjugated diene polymer chains being such that the part other than the isoprene block is a homopolymer chain of a conjugated diene monomer, or a copolymer chain of a conjugated diene monomer and an aromatic vinyl monomer, wherein a weight ratio of a conjugated diene monomer unit to an aromatic vinyl monomer unit (the conjugated diene monomer unit: the aromatic vinyl monomer unit) is in a range of 100:0 to 50:50, and a polymerization type of the copolymer chain of the conjugated diene monomer and the aromatic vinyl monomer is a random type, the denaturing agent (I) having, per molecule, at least one of (1) one or more epoxy groups and (2) one or more hydrocarbyloxysilyl groups, and (II) being such that a total number of the number of the one or more epoxy groups per molecule and the number of hydrocarbyloxy groups in the one or more hydrocarbyloxysilyl groups per molecule is not less than 3.