Asphalt-polymer compositions, process for making same and uses thereof
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Mar 16, 1995
filing date -
Sep 9, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An asphalt-polymer composition containing: a) at least 25 to 97 wt % of an asphalt, b) at least 1 to 25 wt % of a polymer, and c) at least 2 to 50 wt % of aromatic compound(s), wherein the aromatic compound(s) is present in an amount greater than 2 wt %, the at least one aromatic compound(s) and the polymer are present in amounts such that the ratio of amount present of aromatic compound to amount present of polymer is from 0.5 to 10, and the composition has a FRAASS point of less than or equal to -13.degree. C. and a storage stability defined by a '.DELTA. ring-and-ball' and a '.DELTA. penetrability' of less than or equal to 5. Also a process for preparing such asphalt-polymer composition including mixing the asphalt, the polymer and the aromatic compound at a temperature from 190.degree. to 300.degree. C. for a period of time preferably exceeding 30 minutes. The asphalt-polymer composition can be used as a road asphalt, emulsion or surface coating.
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Cited Art Landscape
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