Herbicidal Oil Dispersion Stabilizer for Chemical Retention
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Solution Overview
Problem
Herbicidal formulations face chemical stability challenges due to interactions among active chemicals like amicarbazone, mesotrione, and nicosulfuron, especially at varying temperatures, which affects their efficacy and longevity in aqueous oil-in-water emulsions.
Innovation Solution
Incorporating a stabilizer mixture of phosphoric acid and/or its derivatives with urea or urea derivatives into the herbicidal oil dispersion, which includes triazolinone, 4-hydroxyphenylpyruvate dioxygenase inhibitors, and sulfonylureas, enhances chemical and physical stability, maintaining high retention rates of active ingredients across different temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If aqueous oil-in-water emulsion formulations are used to reduce solvent issues, then environmental and health safety improves, but chemical stability of active ingredients deteriorates due to interactions at varying temperatures
Solution Approach 1:
The patent introduces phosphoric acid and urea as intermediary substances that mediate between the conflicting active ingredients (amicarbazone, mesotrione, nicosulfuron) in the aqueous formulation. These stabilizers act as chemical buffers that prevent direct harmful interactions between the herbicides while maintaining the benefits of water-based formulation, thereby resolving the contradiction between environmental safety and chemical stability.
Solution Approach 2:
The patent modifies the chemical parameters of the formulation by adding phosphoric acid (providing acidic environment) and urea (providing buffering capacity). This parameter change creates a stabilized chemical environment that prevents degradation of active ingredients at varying temperatures, while maintaining the aqueous nature of the formulation for environmental safety.
2Adaptability or versatility
If multiple effective herbicides are combined to broaden weed control spectrum, then weed control efficacy improves, but chemical stability deteriorates due to interactions among active chemicals
Solution Approach 1:
The phosphoric acid-urea stabilizer system acts as a chemical intermediary that兼容 (compatibilizes) the three different herbicide modes of action (amicarbazone, mesotrione, nicosulfuron). This mediator prevents chemical interactions between the active ingredients while allowing them to maintain their individual herbicidal activities, thus achieving broad spectrum control without sacrificing stability.
Solution Approach 2:
The patent creates a composite herbicidal formulation where phosphoric acid and urea form a stabilizing matrix that holds together the three different active ingredients. This composite structure allows multiple chemicals with different properties to coexist stably, enabling broad weed control spectrum while maintaining formulation integrity.
3Ease of operation
If herbicides are stored at elevated temperatures to maintain liquidity, then ease of application improves, but chemical retention deteriorates due to accelerated degradation
Solution Approach 1:
The phosphoric acid-urea stabilizer system provides beforehand cushioning against thermal degradation. By pre-establishing a buffered chemical environment, the formulation is cushioned against the harmful effects of elevated storage temperatures, allowing it to be stored and applied conveniently while maintaining high chemical retention of active ingredients.
Solution Approach 2:
The addition of phosphoric acid and urea changes the thermal stability parameters of the formulation. This parameter modification allows the herbicide to maintain liquidity at elevated temperatures for ease of application while the stabilizer system prevents degradation, thus resolving the contradiction between operational ease and chemical retention.
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 stabilizer mixture ensures chemical retention of amicarbazone, mesotrione, and nicosulfuron above 95% for extended periods at various temperatures, improving weed control spectrum and formulation stability, with enhanced retention of nicosulfuron at 93% or higher for two weeks at 54°C and above 95% for eight weeks at 40°C.
Implementation Method 1
Incorporating a stabilizer mixture of phosphoric acid and/or its derivatives with urea or urea derivatives into the herbicidal oil dispersion... maintains high retention rates of active ingredients across different temperatures
Data Source
AI summary
An herbicidal composition and method. An oil dispersion is described including one or more base oils; an herbicide composition comprising an herbicide composition comprising a triazolinone, a 4-hydroxyphenylpyruvate dioxygenase inhibitor, and a sulfonylurea; and a stabilizer comprising a phosphoric acid and/or a phosphoric acid derivative, and/or a mixture of phosphoric acid and/or phosphoric acid derivative with urea and/or a urea derivative; the dispersion demonstrating an enhanced spectrum of weed control and enhanced stability. A method of preparing an herbicidal composition and a method of controlling weeds are also described.