Modification Of Asphalt Formulations Containing Recycled Materials With Polymers Derived From Depolymerized Plastics

Abstract

Asphalt formulations containing ground tire rubber and/or plastics can be modified by polymers, oligomers, and waxes made from polymeric material. The addition of polymer, oligomer, or wax can improve stability of ground tire rubber and/or plastic in the asphalt leading to lower formulation costs for polymer modified asphalt producers. In addition, these stable formulations can reduce risk of rutting, and cracking in asphalt roads. The polymer, oligomer, or wax can be made by catalytic depolymerization and/or thermal degradation of polymeric material. The polymeric material can be polystyrene, polypropylene, polyethylene, a combination of polypropylene and polyethylene or recycled plastics.

Dependencies are inferred from the claim text.