Mesotrione Solid Composition Base Stabilization
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Solution Overview
Problem
Mesotrione in solid herbicidal compositions exhibits poor chemical stability, necessitating an improvement to maintain effectiveness in weed control applications.
Innovation Solution
Incorporating a base into the solid composition to create a stable environment for mesotrione, shifting the pH to a range of 7.5 to 12 upon dilution, thereby enhancing the chemical stability of mesotrione.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesotrione is formulated in solid herbicidal compositions without additional stabilizing agents, then the formulation is simple and cost-effective, but the chemical stability of mesotrione deteriorates due to decomposition
Solution Approach 1:
The patent changes the pH parameter of the formulation by introducing a base (such as calcium carbonate, magnesium oxide, or potassium hydroxide) to shift the environment from acidic to basic. This parameter change stabilizes mesotrione by preventing its decomposition, which occurs in acidic conditions. The base maintains pH above 7, thereby improving chemical stability without requiring complex stabilizing agents.
Solution Approach 2:
The patent introduces a base as an intermediary substance that mediates between mesotrione and the acidic environment that would otherwise cause decomposition. The base acts as a buffer and pH regulator, creating a stable chemical environment for mesotrione. This intermediary approach simplifies the formulation compared to using multiple specialized stabilizing agents, as the base simultaneously controls pH and prevents decomposition.
2Reliability
If acidifying agents are used to stabilize mesotrione as taught by prior art, then chemical stability may be improved, but the formulation complexity increases and cost rises
Solution Approach 1:
Instead of following the prior art approach of using acidifying agents to stabilize mesotrione, the patent inverts the approach by using a base to achieve stability. This inversion reveals that mesotrione is actually unstable in acidic conditions and becomes stable in basic conditions. This counterintuitive approach simplifies manufacturing by using common basic materials rather than specialized acidifying agents, thereby improving ease of manufacture while maintaining chemical stability.
3Productivity
If mesotrione is stored in solid composition without base, then the composition remains simple, but decomposition occurs reducing herbicidal efficacy
Solution Approach 1:
The patent changes the pH parameter by incorporating a base to prevent mesotrione decomposition during storage. This parameter change ensures that mesotrione maintains its herbicidal efficacy over time. The base creates a stable chemical environment that preserves the active ingredient's effectiveness, thereby maintaining productivity without requiring complex formulation strategies.
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 inclusion of a base significantly reduces mesotrione decomposition, improving its stability and maintaining herbicidal efficacy in solid formulations.
Implementation Method 1
shifting the pH to a range of 7.5 to 12 upon dilution, thereby enhancing the chemical stability of mesotrione
Implementation Method 2
the inclusion of a base can significantly reduce the decomposition of the mesotrione in a solid herbicidal composition
Data Source
AI summary
A solid herbicidal composition is provided, the composition comprising: i) mesotrione; and ii) a base. A method of controlling plant growth using the composition or a diluted form thereof is also disclosed.