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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/163870
Kind Code:
A rubber composition including at least: a rubber component including at least a polyisoprene rubber; and syndiotactic 1, 2–polybutadiene. The rubber composition increases the crack growth resistance of a vulcanized rubber composition and is characterized by: having 2–50 parts by mass of syndiotactic 1, 2–polybutadiene relative to 100 parts by mass of rubber component; the weight-average molecular weight of the syndiotactic 1, 2–polybutadiene being 100,000–750,000; the syndiotacticity of the 1,2–bonds being at least 60%; and the crystallinity being 30%–80%.

TSUNODA, Katsuhiko (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
FUKUSHIMA, Yasuo (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
MAEDA, Ryosuke (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
ASAKURA, Takafumi (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
Application Number:
Publication Date:
August 29, 2019
Filing Date:
February 21, 2019
Export Citation:
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BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
C08L7/00; B60C1/00; B62D55/24; B63B59/02; B65G15/32; C08L9/00; F16F1/36; F16L11/04
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (Toranomon ES Bldg. 7F, 25-2 Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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