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Patent Searching and Data


Title:
HEAVY-DUTY PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2010/134523
Kind Code:
A9
Abstract:
A heavy-duty pneumatic tire is provided in which it is possible to prevent cracks (including cracks generating from the joint) from generating in the rubber portions that come into contact with the rim flanges during the period from no load to a high load when the tire has been inflated to a proper air pressure, and which can hence have greatly improved durability. The heavy-duty pneumatic tire has a rubber chafer (8) disposed in at least the area of each bead portion (1) which comes into contact with the rim, and is configured so that the rubber chafer (8) is formed from a rubber composition comprising: 100 parts by mass of a rubber component comprising 45-55 parts by mass of butadiene rubber having 10-30 parts by mass of polybutadiene rubber containing a syndiotactic 1,2-structure and 45-55 parts by mass of natural rubber; and 50-60 parts by mass, excluding 50 and 60 parts by mass, of carbon black having a DBP of 85-115 mL/100 g and an N2SA of 50-100 m2/g.

Inventors:
KATSUBE Yoshihiro (3-1-1 Ogawahigashi-cho, Kodaira-sh, Tokyo 31, 〒1878531, JP)
Application Number:
JP2010/058359
Publication Date:
December 22, 2011
Filing Date:
May 18, 2010
Export Citation:
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Assignee:
BRIDGESTONE CORPORATION (10-1, Kyobashi 1-chome Chuo-k, Tokyo 40, 〒1048340, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋1丁目10番1号 Tokyo, 〒1048340, JP)
International Classes:
B60C15/06; B60C1/00; C08K3/04; C08L7/00; C08L9/00
Attorney, Agent or Firm:
FUJIMOTO Eisuke et al. (KA111 Building 5F 1-1, Kandaawaji-cho 1-chome, Chiyoda-k, Tokyo 63, 〒1010063, JP)
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Claims: