申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20140206811A1
公开(公告)日:2014-07-24
A conjugated diene polymer rubber is provided that includes component (A) and component (B) below, component (A) having a content, with the total amount of component (A) and component (B) as 100% by weight, of from 5% to 90% by weight, and component (B) having a content of from 95% to 10% by weight,
Component (A): a conjugated diene polymer rubber component modified with a carbonyl group- and substituted amino group-containing compound
Component (B): a conjugated diene polymer rubber component modified with a compound represented by formula (IIa) below
(R
21
O)
m
Si(R
22
A)
n
R
23
4-m-n
(IIa)
wherein m denotes a number from 1 to 3, n denotes a number from 1 to 3, m+n is from 2 to 4, R
21
and R
23
denote a hydrocarbyl group, R
22
denotes a hydrocarbylene group, A denotes a substituted amino group or an optionally substituted hydrocarbyloxy group, when there are a plurality of R
21
s the plurality of R
21
s may be identical to or different from each other, when there are a plurality of R
22
s the plurality of R
22
s may be identical to or different from each other, when there are a plurality of R
23
s the plurality of R
23
s may be identical to or different from each other, and when there are a plurality of As the plurality of As may be identical to or different from each other.