Title:
タイヤ用ゴム組成物及び空気入りタイヤ
Document Type and Number:
Japanese Patent JP7069688
Kind Code:
B2
Abstract:
Provided is a rubber composition for tires which contains: a rubber component including an aromatic vinyl-conjugated diene copolymer that contains aromatic vinyl units and conjugated diene units, a high-cis polybutadiene rubber having a cis microstructure content of 95% by mass or higher, and an isoprene-based rubber; carbon black; and a silica having a NSA of 40 m/g or more, the copolymer containing at least 80% of isolated aromatic vinyl units based on the total aromatic vinyl units, the copolymer having a ΔTg of more than 10°C but less than 20°C as determined by DSC, the rubber component including, based on 100% by mass thereof, 1-45% by mass of the copolymer, 20-64% by mass of the high-cis polybutadiene rubber, and 35-60% by mass of the isoprene-based rubber, the rubber composition containing 5 parts by mass or more of the silica per 100 parts by mass of the rubber component.
Inventors:
Sachiko Mori
Takahiro Mabuchi
Daisuke Sato
Takahiro Mabuchi
Daisuke Sato
Application Number:
JP2017241695A
Publication Date:
May 18, 2022
Filing Date:
December 18, 2017
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
C08L9/00; B60C1/00; C08K3/04; C08K3/36; C08K5/3477; C08K5/548; C08K9/02; C08L15/00; C08L19/00; C08L101/00
Domestic Patent References:
| JP6240732B2 | ||||
| JP2016125017A | ||||
| JP62220536A | ||||
| JP63030502A | ||||
| JP2011256373A | ||||
| JP2012255099A | ||||
| JP2016003269A |
Foreign References:
| WO2017057758A1 |
Attorney, Agent or Firm:
Patent Business Corporation Yasutomi International Patent Office