Claims
- 1. A herbicidal concentrated oil in water emulsion composition consisting essentially of, on a weight basis, about 5% to 40% pendimethalin; 5% to 40% of a water immiscible solvent; 0.5% to 5.0% of an alkylphenol polyethylene oxide condensate; 0.5% to 5.0% of an ethylene oxide/propylene oxide block copolymer; 0% to 5.0% of an anionic dispersant; and sufficient water to total 100%; wherein said water immiscible solvent consists essentially of xylene or an aromatic hydrocarbon mixture having a distillation range in a temperature range of about 183.degree. C. to about 305.degree. C.
- 2. The composition according to claim 1 wherein the alkylphenol polyethylene oxide condensate is a nonylphenol ethoxylate with 9 to 10 mols of ethylene oxide; the ethylene oxide/propylene oxide block copolymer is a butyl-omega-hydroxypoly(oxypropylene)block copolymer with poly(oxyethylene) having a molecular weight in a range of 2,400 to 3,500; the anionic dispersing agent is an alkali metal salt of fatty acid tauride or fatty acid alkyltauride or a free acid of an alkylphenol ethoxylate phosphate ester or a dialkylphenol ethoxylate phosphate ester.
- 3. The composition according to claim 2 wherein the dispersed organic phase has an average droplet size of less than 2 microns.
- 4. The composition according to claim 3 wherein the composition contains alpha-butyl-omega-hydroxy-ethylene oxide propylene oxide block copolymer having an HLB of 12 and a viscosity at 25.degree. C. of 2,000 CPS, nonylphenol ethoxylate (9 to 10 mols of ethylene oxide), and the dispersing agent is sodium N-methyl-N-oleoyltaurate or nonylphenol ethoxylate phosphate ester (6 mols EO), or dinonylphenol ethoxylate phosphate ester (14 mols EO).
- 5. The composition according to claim 4 consisting essentially of, on a weight basis, 20% to 35% pendimethalin; 25% to 35% water immiscible solvent; 1.5% to 2.5% alpha-butyl-omega-hydroxyethylene oxide propylene oxide block copolymer having an HLB of 12 and a viscosity at 25.degree. C. of 2,000 CPS; 1.5% to 2.5% nonylphenol ethoxylate (9 to 10 mols of ethylene oxide); 1.5% to 2.5% dispersing agent; and a sufficient amount of water to total 100%.
- 6. A herbicidal concentrated oil in water emulsion composition consisting essentially of 5% to 40% pendimethalin, 5% to 40% of a water immiscible solvent, alkylphenol polyethylene oxide condensate and ethylene oxide/propylene oxide block copolymer emulsifying agents, an anionic dispersant, and water, the emulsifying agents and dispersant being present in an amount resulting in a physically and chemically stable concentrated oil in water emulsion; wherein said water immiscible solvent consists essentially of xylene or an aromatic hydrocarbon mixture having a distillation range in a temperature range of about 183.degree. C. to about 305.degree. C.
Parent Case Info
This is a continuation of application, Ser. No. 007,066, filed Jan. 27, 1987, now U.S. Pat. No. 4,810,279.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0978766 |
Dec 1975 |
CAX |
Continuations (1)
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Number |
Date |
Country |
Parent |
7066 |
Jan 1987 |
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