Mixing procedure for obtaining filled rubber vulcanizates containing aromatic furazan oxides
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United States of America Patent
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Feb 18, 1986
Grant Date -
N/A
app pub date -
Sep 21, 1984
filing date -
Sep 21, 1984
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Expired
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Abstract
Filled rubber vulcanizates containing aromatic furazan oxides exhibit many improved properties such as increased filler-rubber interaction and decreased hysteresis. Useful furazan oxides have both carbons of the furazan ring as part of a fused aromatic ring. Typical examples are benzofurazan oxide and its methyl and methoxy analogs. Tires made from the inventive vulcanizates show lower running temperatures and improved rolling resistance. The desirable effects of the aromatic furazan oxides may be improved by mixing the rubber, filler and furazan oxide in a conventional mechanical compounding device at specific temperatures and time periods such as about 200.degree.-400.degree. F. for 2-20 minutes.
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