Herbicidal Composition Emulsion Stability in Hard Water
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Solution Overview
Problem
Existing herbicidal compositions containing cyclohexanedione compounds face challenges in forming stable emulsions when diluted with hard water, which affects their efficacy and application efficiency.
Innovation Solution
A herbicidal composition comprising clethodim, a sulfonate surfactant, a polyoxyalkylene polyaryl ether, and an aromatic hydrocarbon, which forms a stable emulsion when diluted with both hard and normal water, enhancing its application and weed control efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing herbicidal compositions containing cyclohexanedione compounds are diluted with hard water, then the composition can be applied to weeds, but the emulsion becomes unstable and efficacy is reduced
Solution Approach 1:
The patent combines multiple surfactants (sulfonate surfactant and polyoxyalkylene polyaryl ether) with the herbicidal cyclohexanedione compound to create a composite formulation. This composite approach allows the composition to form stable emulsions in both hard and soft water by leveraging the synergistic effects of different surfactant types, thereby resolving the contradiction between emulsion stability and water type compatibility
Solution Approach 2:
The patent modifies the chemical composition parameters of the herbicidal formulation by incorporating specific ratios of sulfonate surfactants and polyoxyalkylene polyaryl ethers. These parameter changes in the formulation enable the composition to adapt to varying water hardness conditions while maintaining stable emulsion formation and consistent herbicidal efficacy
2Reliability
If the composition is formulated for optimal stability, then emulsion performance improves, but formulation complexity increases
Solution Approach 1:
The patent employs surfactants that serve multiple functions: the sulfonate surfactant and polyoxyalkylene polyaryl ether not only stabilize the emulsion but also enhance herbicidal activity and provide water adaptability. This multi-functionality reduces the need for additional separate additives, thereby maintaining formulation simplicity while achieving optimal stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition provides effective weed control across various weed species, including graminaceous and broad-leaf crops, with stable emulsion formation ensuring consistent performance regardless of water type, and adjustable formulation for optimal bioefficacy and stability.
Implementation Method 1
a sulfonate surfactant, a polyoxyalkylene polyaryl ether
Implementation Method 2
forms a stable emulsion when diluted with both hard and normal water
Data Source
AI summary
A herbicidal composition comprising i) clethodim, ii) a sulfonate surfactant such as calcium dodecylbenzenesulfonate, iii) a polyoxyalkylene polyaryl ether such as polyoxyethylene polyoxypropylene tristyryl phenyl ether and polyoxyalkylene distyryl phenyl ether, iv) an aromatic hydrocarbon, and optionally, v) an ester of fatty acid such as methyl oleate methyl palmitate, methyl laurate, isopropyl myristate, isopropyl palmitate, octyl laurate, octyl palmitate and butyl stearate gives good stability of the emulsion after it is diluted with water.