US 11,945,953 B2
Ground tire rubber density modification using elastomeric polymers
Eric W. Cochran, Ames, IA (US); Nacu Hernandez, Ames, IA (US); and Ronald Christopher Williams, Ames, IA (US)
Assigned to IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Ames, IA (US)
Filed by Iowa State University Research Foundation, Inc., Ames, IA (US)
Filed on May 25, 2023, as Appl. No. 18/323,643.
Application 18/323,643 is a continuation of application No. 17/562,548, filed on Dec. 27, 2021, granted, now 11,702,544.
Application 17/562,548 is a continuation of application No. 16/445,866, filed on Jun. 19, 2019, granted, now 11,242,459, issued on Feb. 8, 2022.
Claims priority of provisional application 62/688,604, filed on Jun. 22, 2018.
Prior Publication US 2023/0312928 A1, Oct. 5, 2023
Int. Cl. C08L 95/00 (2006.01); C08L 9/06 (2006.01); C08L 23/22 (2006.01); C08L 91/00 (2006.01)
CPC C08L 95/00 (2013.01) [C08L 9/06 (2013.01); C08L 23/22 (2013.01); C08L 91/00 (2013.01); C08L 2555/34 (2013.01); C08L 2555/72 (2013.01); C08L 2555/84 (2013.01)] 7 Claims
 
1. An asphalt product comprising:
a wax;
an asphalt component; and
a plurality of pellets mixed with the asphalt component and comprising a mixture of:
a ground tire rubber (“GTR”); and
an elastomeric polymer, wherein the asphalt component and the plurality of pellets have a difference in density of less than 10%,
wherein the GTR is modified with the elastomeric polymer such that the modified GTR has a density below the density of the asphalt component.