Rubber composition for tire and pneumatic tire
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United States of America Patent
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Jan 16, 2018
Grant Date -
Jun 8, 2017
app pub date -
Nov 4, 2016
filing date -
Dec 4, 2015
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Abstract
An object of the present invention is to provide a rubber composition for tire which can improve initial grip performance and stable grip performance during running at a high level while maintaining sufficient abrasion resistance, and a pneumatic tire having a tread composed of this rubber composition for tire. The rubber composition for tire comprises 70 to 200 parts by mass of a filler and 60 to 250 parts by mass of a softener compounding 15 to 60 parts by mass of a predetermined tackifying resin with a softening point of not less than 110° C. based on 100 parts by mass of a diene rubber component comprising not less than 20% by mass of a SBRa having a glass transition temperature of −35 to 15° C., a styrene content of 35 to 48% by mass and a vinyl unit quantity in the butadiene component of 35 to 55%.
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