タイヤトレッド用ゴム組成物

Japanese Patent JP5838760

B2

PROBLEM TO BE SOLVED: To provide a rubber composition for tire treads that improves abrasion resistance and driving stability while reducing rolling resistance by blending silica with a large particle diameter therewith.SOLUTION: The rubber composition for tire treads is obtained by blending 30-120 pts.wt. of a filler including 50 wt.% or more of silica with 100 pts.wt. of diene rubber including 30 wt.% or more of modified conjugated diene-based polymer rubber, wherein the CTAB specific surface area of the silica is 80-110 m/g, and a ratio of DBP absorption to the CTAB is 1.755 or more. Also, the modified conjugated diene-based polymer rubber has a terminal modified group which is obtained by reacting at least one compound having a functional group with an active conjugated diene-based polymer chain obtained by copolymerizing a conjugated diene-based monomer and an aromatic vinyl monomer. The terminal modified group includes a functional group having interaction with the silica. The modified conjugated diene-based polymer rubber has the content of the aromatic vinyl unit of 38-48 wt.% and the content of a vinyl unit of 20-35%, and has a weight-average molecular weight of 600,000-1,000,000.

JPS5682833	POLYMER BLEND COMPRISING PREBRIDGED POLYMER AND LINEAR POLYMER
JP2011021162	RUBBER COMPOSITION FOR PNEUMATIC TIRE
WO/2012/121216	ELASTOMER COMPOSITION

Kameda Yoshihiro
Makoto Ashiura
Maejima Keisuke
Takashi Shirokawa
Masaki Sato
Ayumi Naga

JP2011258144A

January 06, 2016

November 25, 2011

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THE YOKOHAMA RUBBER CO.,LTD.

C08L9/00; B60C1/00; C08C19/25; C08K3/36; C08L15/00

JP2005281621A

Seiryu International Patent Service Corporation
Takayoshi in the daytime
Shinichi Ogawa
Takashi Noguchi
Kenji Sato
Isao Hirai
Masao Sakaizawa
Kazuhiko Saishita

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