Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Patricia K. Doolin0
Robert H. Wombles0
Roger E. Hayner0
Date of Patent
July 10, 2007
0Patent Application Number
109151760
Date Filed
August 10, 2004
0Patent Primary Examiner
Patent abstract
A method is provided for improving high temperature performance grade properties of polymer-modified, vulcanized asphalt by treating an asphalt cement under mild oxidizing conditions sufficient to provide a change in viscosity per hour as measured at 140° C. of less than about 500 poises per hour, of said asphalt cement, adding 1 wt. % to 10 wt. % of a polymer based on weight of said asphalt cement, and vulcanizing the polymer-containing asphalt cement. The invention further relates to asphalt compositions thus made and paving compositions containing these asphalt compositions.
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