Treatment of rubber to form bituminous compositions
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United States of America Patent
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Feb 17, 1998
Grant Date -
N/A
app pub date -
Sep 12, 1995
filing date -
Dec 29, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides a procedure for at least partial dissociation of crumb rubber vulcanate network, including automobile tires, and for the incorporation of this treated rubber into stable bitumen compositions. The at least partially dissociated rubber vulcanate network may be used independently as a bitumen modifier, or a stabilizing agent for ground vulcanate rubber dispersions in bitumen or as a steric stabilizer in dispersion of polyolefins in bitumen. The at least partially dissociated rubber vulcanate network materials are produced in situ in bitumen or produced separately and subsequently incorporated into bitumen and the bituminous compositions are useful materials for a variety of applications. Modifications are possible within the scope of this invention.
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