With plastic modified, functionalized asphalt, and methods for its production

摘要

Disclosed in this invention are novel asphaltic compositionsand the method of making same. The compositions are made by combiningan asphalt that contains sulfonate or sulfonic acid groups, a polymerpreferably of butyl rubbers, styrene-butadiene linear diblock polymer,styrene-butadiene-styrene linear or radial triblock polymer and EPDMthat has been sulfonated, and mixtures thereof, and a basic neutralizingagent that contains cations having a valence from +1 to +3. Theamount of polymer is an amount less than 7 wt.% of total polymer-asphaltcomposition that is sufficient to produce an asphaltic compositionhaving a viscosity at 135°C in the range of from about 150 cPsto about 2000 cPs or from about 3000 cPs to about 8000 cPs. The novelasphaltic compositions have improved viscoelasticity, softening point,and storage stability. The compositions can be used as binders inroad paving applications.