申请人:Morita Hiroyuki
                            
                            
                                公开号:US20140357784A1
                            
                            
                                公开(公告)日:2014-12-04
                            
                            A modified conjugated diene polymer, which can be used as a raw material of a cross-linked polymer for automobile tires, is prepared by a method including a step of polymerizing a monomer having a conjugated diene compound etc. in the presence of a compound of formula (1) or (2) and an alkali metal compound to obtain a conjugated diene polymer, and a step of reacting the polymer and a compound of formula (3).
In formulae (1) and (2), R
1
is hydrocarbylene; Q is —N(-A
1
)- etc.; A
1
is hydrocarbyl without active hydrogen atom and may have substituent(s).
In formula (3), E is a functional group etc. which has no active hydrogen atom and is bound to R
4
by an atom of N; R
2
and R
3
are hydrocarbyl groups; R
4
is a hydrocarbylene group; and n is an integer of 0 to 2.