Inventors:
Steven L. Engber - Onalaska WI
Gerald H. Reinke - La Crosse WI
Assignee:
Mathy Construction Company - Onalaska WI
International Classification:
C08L 9500
US Classification:
524 59, 524 62, 524 69, 525 545
Abstract:
An acid-reacted polymer-modified asphalt composition comprising (1) at least about 80 weight percent, based upon the composition, of an asphalt; (ii) about 0. 2 to about 15 weight percent, based upon the composition, of a polymer containing available epoxy groups; and (iii) an amount of an acid effective for promoting chemical bonding between the asphalt and the polymer, wherein the composition exhibits substantially improved Dynamic Shear Rheometer stiffness values without an appreciable loss in the Gâ viscous component of complex modulus, and low temperature creep stiffness and âmâ values.