STABLE EMULSION FORMULATION HINDERING INTERACTION ACROSS THE WATER-OIL INTERFACE
Interactions between components in the internal oil phase and components in the continuous aqueous phase of an oil-in-water emulsion are hindered by the addition of a mixture of polymeric surfactants, which reduces chemical and/or physical instabilities, and improves compatibilities of components in formulations.
1 - 5 . (canceled)
6 . A stable oil-in-water emulsion which comprises:
a) a discrete oil phase comprising an oil-soluble ester herbicide;
b) a continuous aqueous phase comprising water, and water soluble or water dispersible ingredients;
c) a first polymeric surfactant comprising an ABA block copolymer having a hydrophilic portion of polyethylene oxide (PEG) and a hydrophobic portion of 12-hydroxystearic acid in an amount from 1 g/L to 200 g/L, and a second polymeric surfactant comprising a polyalkylene glycol ether in an amount from 1 g/L to 200 g/L; and
d) optionally, other inert formulation ingredients.
7 . The emulsion of claim 1 which comprises:
a) a discontinuous oil phase comprising from 1 g/L to 700 g/L of triclopyr butoxyethyl ester;
b) a continuous aqueous phase comprising from 100 g/L to 990 g/L of water and from 1 g/L to 300 g/L of a salt of aminopyralid;
c) from 1 g/L to 200 g/L of a first polymeric surfactant comprising an ABA block copolymer having a hydrophilic portion of polyethylene oxide (PEG) and a hydrophobic portion of 12-hydroxystearic acid, and from 1 g/L to 200 g/L of a second polymeric surfactant comprising a polyalkylene glycol ether; and
d) optionally, other inert formulation ingredients.