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