US 12,342,813 B2
Amine and amine oxide surfactants for controlling herbicide spray drift
Brandon Matthew Downer, Lebanon, IN (US); Mei Li, Westfield, IN (US); Lei Liu, Carmel, IN (US); Kuide Qin, Chapel Hill, NC (US); Holger Tank, Indianapolis, IN (US); Stephen L. Wilson, Zionsville, IN (US); and Hong Zhang, Carmel, IN (US)
Assigned to CORTEVA AGRISCIENCE LLC, Indianapolis, IN (US)
Filed by CORTEVA AGRISCIENCE LLC, Indianapolis, IN (US)
Filed on Sep. 14, 2017, as Appl. No. 15/704,113.
Application 15/704,113 is a continuation of application No. 13/232,377, filed on Sep. 14, 2011, abandoned.
Claims priority of provisional application 61/383,074, filed on Sep. 15, 2010.
Prior Publication US 2018/0168146 A1, Jun. 21, 2018
Int. Cl. A01N 25/06 (2006.01); A01N 25/24 (2006.01); A01N 25/30 (2006.01); A01N 37/40 (2006.01); A01N 57/20 (2006.01)
CPC A01N 25/24 (2013.01) [A01N 25/06 (2013.01); A01N 25/30 (2013.01); A01N 37/40 (2013.01); A01N 57/20 (2013.01)] 19 Claims
 
1. A method of reducing spray drift of an aqueous herbicidal spray mixture, comprising:
formulating an aqueous herbicidal spray mixture comprising:
glyphosate;
an auxinic herbicide; and
from about 0.02 to about 2 weight percent of a tertiary amine surfactant of the formula:

OG Complex Work Unit Chemistry
wherein R1 represents a straight or branched chain (C12-C18) alkyl and R2 and R3 independently represent a straight or branched chain (C1-C18) alkyl, and
wherein the aqueous herbicidal spray mixture comprises a plurality of spray droplets having a volume mean diameter greater than 165 μm.
 
10. A reduced spray drift aqueous herbicidal spray formulation, comprising:
a plurality of spray droplets having a volume mean diameter greater than 165 μm comprising:
glyphosate;
an auxinic berbicide; and
from about 0.02 to about 2 weight percent of a tertiary amine surfactant of the formula:

OG Complex Work Unit Chemistry
wherein R1 represents a straight or branched chain (C12-C18) alkyl and R2 and R3 independently represent a straight or branched chain (C1-C18) alkyl.
 
19. A method of reducing spray drift of an aqueous herbicidal spray mixture, comprising:
formulating an aqueous herbicidal spray mixture comprising:
glyphosate;
an auxinic herbicide; and
from about 0.02 to about 2 weight percent of a tertiary amine surfactant of the formula:

OG Complex Work Unit Chemistry
wherein R1 represents a straight or branched chain (C12-C18) alkyl and R2 and R3 independently represent a straight or branched chain (C1-C18) alkyl, and
wherein the aqueous herbicidal spray mixture comprises a plurality of spray droplets having a volume mean diameter greater than 165 μm; and
spraying the formulation with a flat fan nozzle at 40 psi.