Rubber composition
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United States of America Patent
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Apr 16, 1996
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N/A
app pub date -
Dec 29, 1994
filing date -
Dec 29, 1993
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Abstract
A rubber composition which comprises: a rubber material comprising a polymer which is selected from a conjugated diene polymer and a vinyl aromatic hydrocarbon-conjugated diene copolymer and contains a low molecular weight polymer component and a high molecular weight polymer component, and at least one of carbon black and white carbon. The low molecular weight polymer component and the high molecular weight polymer component each have a linear structure, a number-average molecular weight in respective specified range, and a molecular weight distribution in respective specified range. The polymer has a total molecular weight distribution in which at least two peaks are present. The low molecular weight polymer component and the high molecular weight polymer component are comprised in the polymer in specified amounts. The rubber composition is advantageously used as tire tread rubber and is excellent in low hysteresis loss property, fracture properties and processability.
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