Herbicidal Composition Using Organic Solvents for Stability
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Solution Overview
Problem
Current herbicide formulations, particularly those containing imidazolinone-based ALS inhibitors like imazethapyr and pyrimidinedione-based PPO inhibitors such as saflufenacil, face challenges with low water solubility and stability, leading to reduced efficacy and stability issues when used in agricultural applications.
Innovation Solution
A non-aqueous herbicidal composition is developed using imidazolinone-based ALS inhibitors dissolved in organic solvents like benzyl alcohol, combined with additional herbicides such as VLCFA and PPO inhibitors, forming a stable and effective single liquid formulation for weed control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If imidazolinone-based ALS inhibitors and pyrimidinedione-based PPO inhibitors are formulated in water-based systems, then application convenience is improved, but chemical stability and physical stability deteriorate due to hydrolysis and uncontrolled interconversion of crystalline modifications
Solution Approach 1:
The patent changes the fundamental parameter of the formulation medium from aqueous to non-aqueous (oil-based carrier). This parameter change eliminates water-induced hydrolysis of the N-amino-sulfonylcarboxamide side chain and prevents uncontrolled interconversion of saflufenacil's crystalline modifications, thereby resolving the stability issues while maintaining application convenience through proper formulation design
Solution Approach 2:
The patent creates a composite formulation system combining saflufenacil (PPO inhibitor) with imidazolinone-based ALS inhibitors in a non-aqueous oil-based carrier. This composite approach allows both herbicides to be formulated together without water-induced degradation, achieving enhanced stability while maintaining ease of application through a single mixed formulation
2Ease of operation
If saflufenacil is formulated in aqueous media, then ease of application is improved, but dilution properties deteriorate due to coarse particle separation from diluted formulation
Solution Approach 1:
The patent changes the formulation medium from water-based to oil-based, which fundamentally alters the solubility and dispersion characteristics of saflufenacil. In the non-aqueous medium, saflufenacil remains finely dispersed and stable, preventing particle coarsening and separation during storage and dilution, thereby ensuring reliable dilution properties while maintaining ease of application
Solution Approach 2:
The patent introduces an oil-based carrier as an intermediary medium that mediates between saflufenacil and the aqueous application environment. This intermediary carrier allows saflufenacil to be transported and applied conveniently while maintaining its fine particle state, and ensures uniform dispersion when diluted with water during application
3Device complexity
If single herbicide is used, then formulation simplicity is improved, but weed control spectrum and duration deteriorate
Solution Approach 1:
The patent merges two herbicides with different modes of action (saflufenacil as PPO inhibitor and imidazolinone-based ALS inhibitor) into a single non-aqueous formulation. This combining approach expands the weed control spectrum to cover both broadleaf and grassy weeds, provides longer residual control duration, and maintains formulation simplicity through a single mixed product rather than requiring separate applications
Solution Approach 2:
The patent creates a universal herbicidal formulation that performs multiple functions: it controls both broadleaf weeds (via saflufenacil) and grassy weeds (via imidazolinone-based ALS inhibitor), provides both contact and residual control, and can be applied conveniently as a single formulation. This multi-functionality is achieved while maintaining formulation simplicity through the non-aqueous carrier system
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 demonstrates equivalent or superior efficacy to traditional tank mixes in controlling various weeds, offering improved stability and convenience for agricultural use by dissolving imidazolinone-based herbicides in organic solvents like benzyl alcohol, enhancing their stability and application efficiency.
Implementation Method 1
imidazolinone-based ALS inhibitors dissolved in a particular organic solvent
Data Source
AI summary
The present invention provides an herbicidal composition useful in controlling weed, comprising an imidazolinone-based acetolactate synthase (ALS) inhibitor dissolved in a particular organic solvent, and optionally one or more additional herbicides such as a very long chain fatty acid (VLCFA) inhibitor and a protoporpyrinogen oxidase (PPO) inhibitor.