Tire tread base containing syndiotactic-1,2-polybutadiene with diverse carbon blacks
AssigneeThe Goodyear Tire & Rubber Company
InventorsClaude Schweitzer, Junling Zhao, Marc Weydert
Life of this patent
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Abstract
The invention relates to a pneumatic tire having a cap/base configuration comprised of an outer tread cap rubber layer, with a tread running surface, and an underlying tread base rubber layer, where the base rubber layer contains syndiotactic polybutadiene with a diverse blend of carbon blacks.
Claims11
A pneumatic rubber tire having a circumferential tread of a cap/base configuration comprised of an outer tread cap rubber layer and an internal tread rubber layer underlying said outer tread cap rubber layer, wherein said internal tread rubber layer rubber composition is comprised of, based upon parts by weight per 100 parts by weight rubber (phr):
- (A) rubber(s) comprised of:
- (1) about 2 to about 100 phr of syndiotactic-1,2-polybutadiene, and
- (2) from zero to about 98 phr of at least one additional elastomer comprised of at least one of polymers and copolymers of at least one of isoprene and 1,3-butadiene and copolymers of styrene and at least one of isoprene and 1,3-butadiene,
- (B) from about 20 to about 70 phr of rubber reinforcing carbon blacks comprised of:
- (1) about 10 to about 40 phr of a first rubber reinforcing carbon black having an Iodine absorption value (ASTM D2515) in a range of from about 6 to about 50 g/kg and a dibutylthalate (DBP) absorption value (ASTM D2414) in a range of from about 30 to about 200 cc/100 g,
- (2) about 10 to about 40 phr of a second rubber reinforcing carbon black having an Iodine absorption value (ASTM D2515) in a range of from about 100 to about 1000 g/kg (ASTM D2515) and a dibutylthalate (DBP) absorption value (ASTM D2414) in a range of from about 95 to about 135 cc/100 g.
Dependencies are inferred from the claim text.