Acid-reacted polymer-modified asphalt compositions and preparation thereof
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United States of America Patent
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Sep 12, 2000
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app pub date -
May 23, 1997
filing date -
Mar 13, 1995
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Abstract
An acid-reacted polymer-modified asphalt composition including (i) 80 weight percent asphalt, (ii) 0.2 to 15 weight percent polymer containing available epoxy groups, and (iii) an acid effective for promoting chemical bonding between the asphalt and the polymer, wherein the composition exhibits substantially improved Dynamic Shear Rheometer stiffness values, without an appreciable loss in the G' viscous component of the complex modulus, low temperature creep stiffness and 'm' values of the composition.
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