Patent ID: 8722581

Claim:
A stable aqueous liquid herbicidal concentrate comprising an ammonium salt of glyphosate and containing at least about 360 g/L glyphosate a.e., ammonium ion in a molar ratio to glyphosate between about 0.8 and about 2.5, at least one alkoxylated quaternary alkylammonium salt surfactant corresponding to the formula: RR′N (+) AB where R is a straight chain or branched chain, saturated or unsaturated alkyl group having from 8 to 22 carbon atoms, R′ is a straight or branched chain, saturated or unsaturated alkyl group having from 1 to 4 carbon atoms, A is (R 2 O) p (R 3 O) q (R 4 O) z R 8 and B is (R 5 O) p′ (R 6 O) q′ (R 7 O) z′ R 9 where each of R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 is independently selected from the group consisting of ethylene and isopropylene, each of R 8 and R 9 is independently selected from the group consisting of hydrogen, methyl and ethyl, and each of p, q, p′, q′, z and z′ is independently an integer between 0 and 30 and the sum of p+p′+q+q′+z+z′ is at least about 2, and at least one polyalkylene oxide alkyl ether surfactant, the weight ratio of the sum of said alkoxylated quaternary alkylammonium salt surfactant(s) to polyalkylene oxide alkyl ether surfactant(s) being greater than 4.5:1, and wherein the concentrate is a stable, single-phase homogenous mixture.