Patents Assigned to Mathy Construction Company
  • Acid-reacted polymer-modified asphalt compositions and preparation thereof
    Patent number: 6399680
    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 G″ viscous component of complex modulus, and low temperature creep stiffness and “m” values.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: June 4, 2002
    Assignee: Mathy Construction Company
    Inventors: Steven L. Engber, Gerald H. Reinke
  • Acid-reacted polymer-modified asphalt compositions and preparation thereof
    Patent number: 6117926
    Abstract: An acid-reacted polymer-modified asphalt composition including (i) 80 weight percent asphalt, (ii) 0.2 to 15 weight percent polymer containing available epoxy groups, and (iii) 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 G" viscous component of the complex modulus, low temperature creep stiffness and "m" values of the composition.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: September 12, 2000
    Assignee: Mathy Construction Company
    Inventors: Steven L. Engber, Gerald H. Reinke