Heavy duty vehicle pneumatic tires

Details Heavy duty vehicle pneumatic tires Heavy duty vehicle pneumatic tires

1993-09-21

1995-05-30

Seccuro, Jr., Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525236, 525237, 525192, 525194, 152209R, C08L 700, C08L 900, B60C 100

Patent

active

054201934

ABSTRACT:
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.degree. to 170.degree. C., an average particle diameter of not more than 100 .mu.m, 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%.

REFERENCES:
patent: 4220564 (1980-09-01), Tanimoto et al.
patent: 4274462 (1981-06-01), Ogawa et al.
patent: 4396052 (1983-08-01), Ahagon et al.
patent: 4721749 (1988-01-01), Odar et al.
patent: 4790365 (1988-12-01), Sandstrom et al.
patent: 4914147 (1990-04-01), Mouri et al.

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