US 11,981,817 B2
Hydrogen sulfide scavengers for asphalt
Xiaowei Tong, Sugar Land, TX (US); Jennifer L. Sorrells, Houston, TX (US); Elizabeth Balapitiya, Missouri City, TX (US); and Ravindranath Mukkamala, Sugar Land, TX (US)
Assigned to ECOLAB USA Inc., St. Paul, MN (US)
Filed by ECOLAB USA INC., St. Paul, MN (US)
Filed on Feb. 26, 2020, as Appl. No. 16/801,726.
Claims priority of provisional application 62/812,108, filed on Feb. 28, 2019.
Prior Publication US 2020/0277498 A1, Sep. 3, 2020
Int. Cl. C08J 3/20 (2006.01); C08L 95/00 (2006.01)
CPC C08L 95/00 (2013.01) [C08J 3/203 (2013.01); C08J 2395/00 (2013.01); C08L 2555/32 (2013.01); C08L 2555/50 (2013.01); C08L 2555/60 (2013.01)] 19 Claims
 
1. A composition for reducing hydrogen sulfide emission from asphalt, comprising:
(a) a metal-containing compound comprising a member selected from the group consisting of a metal carboxylate, a metal carbonate, and any combination thereof; and
(b) a sulfide-scavenging agent selected from the group consisting of hexamethylenetetramine and a 1,3,5-triazine derivative of Formula I:

OG Complex Work Unit Chemistry
wherein each of R1, R2, and R3 is independently selected at each occurrence from hydrogen, straight or branched C1-C30 alkyl, hydroxyl substituted straight or branched C1-C30 alkyl, and straight or branched C1-C30 alkyl substituted with straight or branched C1-C30 alkoxy, wherein the metal-containing compound does not comprise zinc.