Tire tread rubber
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United States of America Patent
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Jun 15, 1993
Grant Date -
N/A
app pub date -
Jul 10, 1991
filing date -
Jul 10, 1991
priority date (Note) -
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Abstract
An all season tire tread rubber blend comprises about 30 to 50 parts per hundred low vinyl polybutadiene; about 25 to 60 parts per hundred natural rubber and/or synthetic polyisoprene; and about 10 to 25 parts per hundred high styrene styrene/butadiene rubber and/or other diene polymer having a glass transition temperature of about -5.degree. to about -20.degree. C. A preferred embodiment comprises about 40 parts per hundred low vinyl solution polybutadiene, about 40 parts per hundred natural rubber, and about 20 parts per hundred high styrene solution styrene/butadiene. Tires employing the tire tread rubber of this invention exhibit improved wet and winter traction and superior abrasion resistance and treadwear without increased rolling resistance.
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