Heavy duty vehicle pneumatic tires

Details Heavy duty vehicle pneumatic tires Heavy duty vehicle pneumatic tires

B - Operations, Transporting

60

C

B60C 1/00 (2006.01) B60C 11/00 (2006.01) C08L 7/00 (2006.01) C08L 9/00 (2006.01) C08L 9/06 (2006.01)

Patent

CA 2106795

A heavy duty vehicle pneumatic tire comprising a tread, wherein the tread is composed of a diene-based rubber composition, and crystalline syndiotactic-1,2-polybutadiene is incorporated into said rubber composition in an amount of 5 to 60 parts by weight relative to 100 parts by weight of a diene-based rubber component of the rubber composition. The syndiotactic 1,2-polybutadiene has a melting point of 130 to 170°C, an average particle diameter of not more than 100 Vim, and a ratio of a major axis to a minor axis (L/D) being not more than 3. The content of 1,2-structural units in the syndiotactic-1,2 polybutadiene is not less than 75 % by weight, and a syndiotacticity of the 1,2-structural units is not less than 75 %.

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