Aqueous Herbicide Concentrate Stability via Nonionic Surfactants
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Solution Overview
Problem
Existing herbicidal formulations containing 4-benzoyl-substituted pyrazole compounds and benzoic acid compounds face stability and homogeneity issues when combined with adjuvants, leading to incompatibility and reduced effectiveness during storage and application.
Innovation Solution
Incorporating nonionic surfactants such as polyether compounds derived from ethylene oxide and alkyl polyglycosides, which stabilize the formulation, prevent solid separation, and enhance the herbicidal effect while reducing damage to agricultural crops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adjuvants are incorporated into herbicidal formulations containing 4-benzoyl-substituted pyrazole compounds and benzoic acid compounds, then the herbicidal effectiveness and selectivity are improved, but the formulation stability and homogeneity deteriorate due to incompatibility and solid separation during storage
Solution Approach 1:
The patent employs solubilizing agents and compatibility promoters as intermediary substances that mediate between the hydrophobic adjuvants and the aqueous herbicidal active ingredients. These intermediaries prevent direct incompatibility reactions while maintaining the stabilizing effect of adjuvants, thus resolving the contradiction between effectiveness enhancement and formulation stability
Solution Approach 2:
The invention creates a composite formulation system that integrates multiple components including herbicidal active ingredients, adjuvants, solubilizing agents, and compatibility promoters into a unified stable mixture. This composite approach allows the synergistic effects of adjuvants to be preserved while preventing separation and incompatibility through proper formulation design
2Reliability
If adjuvants are added to enhance herbicidal activity, then the selectivity towards harmful plants is improved, but the formulation becomes incompatible with other components leading to reduced practical applicability
Solution Approach 1:
The patent modifies formulation parameters by introducing solubilizing agents and compatibility promoters that change the physical and chemical properties of the mixture. These parameter changes enable the adjuvants to maintain their selectivity-enhancing properties while becoming compatible with other formulation components, thus improving practical applicability
3Duration of action of stationary object
If herbicidal formulations are stored for long periods, then the opportunity for extended use is improved, but incompatibility reactions occur between active ingredients and excipients reducing effectiveness
Solution Approach 1:
The patent applies beforehand cushioning by incorporating stability-enhancing excipients and compatibility promoters that preemptively protect against incompatibility reactions during storage. These protective agents cushion against potential degradation and separation, allowing the formulation to maintain its effectiveness throughout the intended storage period
4Reliability
If concentrations of adjuvants and benzoic acid compounds are increased to enhance herbicidal effect, then the absolute effectiveness is improved, but inhomogeneities and solid separation occur in the formulation
Solution Approach 1:
The patent uses solubilizing agents as intermediaries that enable higher concentrations of adjuvants and benzoic acid compounds to be incorporated into the formulation without causing inhomogeneity or solid separation. These intermediaries facilitate the integration of high concentrations of active components while maintaining formulation 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 use of nonionic surfactants results in a stable, homogeneous aqueous active ingredient concentrate that maintains effectiveness and reduces crop damage, allowing for easy dilution and improved herbicidal performance beyond synergistic effects.
Implementation Method 1
The effect of adjuvants for herbicides is often based on their interfacial activity, which ensures contact with the application form of the active ingredient, i.e. d. R. an aqueous spray mixture containing active ingredients, which improves the plant surface and improves the penetration of the application form and thus the active ingredient into the soil by reducing the surface tension
Implementation Method 2
aqueous active ingredient concentrates, which contain in dissolved form: a) at least one 4-benzoyl-substituted pyrazole compound... b) at least one benzoic acid compound... c) at least one nonionic surfactant S
Implementation Method 3
The formulation should also be easy to dilute with water... The active ingredient concentrates are easy to handle and can be diluted with water without any separation of active ingredients occurring
Data Source
AI summary
The invention relates to an aqueous active ingredient concentrate, comprising in dissolved form: a) at least one 4-benzoyl-substituted pyrazol compound of the formula (I), wherein R1, R3 independently of each other stand for hydrogen, halogen, methyl, halogen methyl, methoxy, halogen methoxy, methylthio, methyl sulfinyl, or methyl sulfonyl; R2 stands for a 5-membered heterocyclic residue, which is unsubstituted, or which carries 1, 2, 3, or 4 substituents, which are selected from halogen, C1-C6-alkyl, C1-C4-akoxy, C1-C4-halogenalkyl, C1-C4-halogen alkoxy, and C1-C4-alkylthio; R4 stands for hydrogen, halogen, or methyl; R5 stands for C1-C6-alkyl, C3-C6-cycloalkyl, or C3-C6-cycloalkyl methyl; and R6 stands for hydrogen or C1-C4-Alkyl; or one of its salts used in agriculture; b) at least one benzoic acid compound of the formula (II), wherein R7 stands for hydrogen, halogen, hydroxy, or methoxy, and R8 stands for hydrogen, halogen, or amino; or one of its salts used in agriculture; and c) have at least one non-ionic surface-active substance S, selected from polyether compounds having repeat units derived from ethylene oxide, alkyl polyglycosides, and mixtures thereof.