Patent ID: 7642302
Filing Date: 2010-01-05
Classification: C08L

Abstract:
1. A process for preparing a modified asphalt binder composition, the process comprising: mixing asphalt binder, unsaturated polymer, and phosphorus pentasulfide to form a modified asphalt composition, where the amount of polymer is from about 0.5 to about 10 parts by weight per 100 parts by weight asphalt, where the amount of phosphorus pentasulfide is from about 0.001 to about 10 parts by weight per 100 parts by weight asphalt, and where the unsaturated polymer and phosphorus pentasulfide are added directly to the asphalt binder prior to any premixing or pre-blending of the unsaturated polymer and phosphorus pentasulfide, and where the phosphorus pentasulfide includes a blend of P