Rubber composition and method for producing same
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United States of America Patent
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Sep 22, 2015
Grant Date -
Jan 8, 2015
app pub date -
Dec 6, 2012
filing date -
Mar 23, 2012
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Abstract
A rubber composition obtained by dry-mixing a natural rubber wet master batch yielded by mixing at least a natural rubber latex and a carbon-black-containing slurry solution with each other in a liquid phase and drying the resultant mixture, a dry rubber made mainly of a polybutadiene rubber, and an oil, wherein when the total amount of rubber components in the rubber composition is regarded as 100 parts by mass, the natural rubber is contained in an amount of 50 parts or more by mass, and the polybutadiene rubber is contained in an amount of 20 to 50 parts by mass, and the oil has a pour point of −10 C or lower, and an aniline point of 90 C or higher, and the blend amount of the oil is from 15 to 40 parts by mass for 100 parts by mass of the rubber components.
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