Polymers and their use in asphalt compositions and asphalt concretes
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United States of America Patent
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N/A
Issued Date -
Apr 6, 2006
app pub date -
Aug 10, 2005
filing date -
Oct 2, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A modified asphalt composition comprising a naphthenic asphalt, and a high-vinyl block copolymer is presented. The modified asphalt composition is prepared by combining a naphthenic asphalt and a high-vinyl block copolymer. Further an asphalt concrete is presented, such concrete comprises an asphalt, a functionalized block copolymer, and a siliceous aggregate. A diblock copolymer is presented, such copolymer comprises a vinyl block comprising conjugated vinyl aromatic units, a diene block comprising conjugated diene units and substantially devoid of a tapered block section between the vinyl block and the diene block wherein the diblock copolymer comprises a vinyl content of at least about 20%, and a molecular weight of at least about 50,000.
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