{HEAD ~ A process} of preparing a polymer modified asphalt comprising mixing a predetermined amount of a polymer asphalt master batch with a predetermined amount of {TAIL ~ an asphalt cross} linking agent blend 
{ HEAD ~ A process } of preparing a polymer modified asphalt comprising mixing a predetermined amount of a polymer asphalt master batch with a predetermined amount of { TAIL ~ an asphalt cross } linking agent blend
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH