Rubber composition for tire tread, and studless tire
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United States of America Patent
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Aug 7, 2018
Grant Date -
Mar 15, 2018
app pub date -
Apr 12, 2016
filing date -
Apr 13, 2015
priority date (Note) -
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Abstract
The present invention is to provide a rubber composition for a tire tread, which can produce a studless tire having both excellent performance on ice and excellent wear resistance, and to provide a studless tire using the rubber composition. The rubber composition for a tire tread of the present invention contains 100 parts by mass of a diene rubber (A) containing a modified butadiene rubber and from 0.5 to 25 parts by mass of thermally expandable microcapsules (B). The modified butadiene rubber is obtained by modifying an unmodified butadiene rubber with a carboxy group-containing nitrone compound. The content of the modified butadiene rubber in the diene rubber (A) is from 20 to 65 mass %.
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