Crop oil concentrate adjuvants containing amine surfactants
In agricultural practice it is known to use emulsifiable oils (commonly referred to a Crop Oil Concentrates, COC) as bioefficacy enhancers for pesticides, especially herbicides. Cationic surfactants are widely known to be particularly effective bio-active enhancers for herbicides, especially for glyphosate-type herbicides. The present invention includes two novel aspects: 1) While the vast majority of COCs are petroleum-based paraffinic oils or esterified seed oils, this invention embodies a new oil phase, a hydrocarbon oil such exemplified by EXXON-MOBIL'S D-130, which when combined with the surfactants described herein, exhibits surprising enhancement of herbicidal activity in field tests; and 2) COC's are designed to form stable emulsions in water. The combination of cationic surfactants and phosphate esters in this invention not only form very stable emulsions in water, but, surprisingly, also form extremely stable emulsions in concentrated liquid fertilizers, including 32-0-0 fertilizer.
1. A microemulsion comprising:
(a) a crop oil concentrate (COC) comprising:
from 8 w/w % to 10 w/w % of one or more alkoxylated amine surfactant components;
from 28 w/w % to 30 w/w % of a phosphate ester component; and
60 w/w % of a dearomatized hydrocarbon oil component;
(b) water; and
(c) at least one agriculturally-active material.
2. The microemulsion of claim 1 , wherein the surfactant is an alkyl amine alkoxylate.
3. The microemulsion of claim 2 , wherein the surfactant is a tallow amine ethoxylate.
4. The microemulsion of claim 1 , wherein the surfactant is a polyetheramine alkoxylate.
5. The microemulsion of claim 1 , wherein the surfactant is an alkyl diamine alkoxylate.
6. The microemulsion of claim 1 , wherein the alkoxylated amine surfactant component has a w/w % of 10 %.
7. The microemulsion of claim 6 , wherein the phosphate ester surfactant component has a w/w % of 30 %.
8. A microemulsion consisting of:
(a) a crop oil concentrate (COC) consisting of:
from 8 w/w % to 10 w/w % of one or more alkoxylated amine surfactant components;
from 28 w/w % to 30 w/w % of a phosphate ester component; and
60 w/w % of a dearomatized hydrocarbon oil component,
(b) water; and
(c) at least one agriculturally-active material.
9. The microemulsion of claim 8 , wherein the alkoxylated amine surfactant component has a w/w % of 10 %.
10. The microemulsion of claim 9 , wherein the phosphate ester surfactant component has a w/w % of 30 %.
11. A method of controlling weeds, comprising:
diluting a composition into a spray tank with one or more pesticides, wherein the composition comprises:
a crop oil concentrate (COC) comprising:
from 8 w/w % to 10 w/w % of one or more alkoxylated amine surfactant components;
from 28 w/w % to 30 w/w % of a phosphate ester component; and
60 w/w % of a dearomatized hydrocarbon oil component, and then applying the composition to a plant.
12. The method of claim 11 , wherein the COC comprises:
10 w/w % of the one or more alkoxylated amine surfactants; and
from 28 w/w % to 30 w/w % of the phosphate ester surfactant.