E. I. du Pont de Nemours and Company
MODIFIED ASPHALT USING EPOXIDE-CONTAINING POLYMERS

Abstract:

A polymer-modified asphalt composition comprises or is produced from asphalt and a high-melt flow index ethylene co/terpolymer comprising copolymerized units derived from ethylene, an epoxy-containing comonomers, and optionally a third monomer selected from the group consisting of acrylates, methacrylates, vinyl esters, and the like. The modified asphalt composition may further comprise a nonreactive polymer, such as a styrene/conjugated-diene block copolymer, and a co-reactant, such as an acid or an acid anhydride. Further provided are processes for producing the polymer-modified asphalt composition, and paving and roofing materials that comprise the polymer-modified asphalt composition.