Terminal-modified conjugated diene polymer, rubber composition and rubber article
AssigneeBridgestone Corporation
InventorsYusuke Yamagata, Shojiro Kaita, Shigenaga Takano
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Abstract
An object of the present disclosure is to provide a terminal-modified conjugated dime polymer capable of improving fracture resistance of a rubber article. Specifically, a terminal-modified conjugated diene polymer is characterized in that a content of catalyst residue therein derived from a catalyst used in polymerization is less than 60 ppm.
Claims10
A terminal-modified conjugated diene polymer, wherein a content of catalyst residue therein derived from a catalyst used in polymerization is less than 30 ppm,
- wherein the catalyst is a polymerization catalyst composition and
- (1) the polymerization catalyst composition includes tris[N,N-bis(trimethylsilyl)amide]gadolinium (III) and 1-benzylindene;
- or
- (2) the polymerization catalyst composition includes bis(2-phenylindenyl)gadolinium bis(dimethylsilyl amide).
The terminal-modified conjugated diene polymer of claim wherein the polymerization catalyst composition further includes, as component (C), two or more types of a compound represented by the following general formula (X):
- AlR31R32R33 (X)
- wherein R31 and R32 represent a hydrogen atom or a C1-10 hydrocarbon group, R33 represents a C1-10 hydrocarbon group, R31, R32 and R33 may be of either the same type or different types.
Dependencies are inferred from the claim text.