Sulfoximine Insecticidal Composition with Multi-Solvent System
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Solution Overview
Problem
Existing insecticidal compositions using sulfoximines as active ingredients face inefficacy due to limited solubility and require improvement in persistence and efficacy against mosquito populations, particularly when applied through Ultra Low Volume (ULV) technology.
Innovation Solution
Insecticidal compositions incorporating a sulfoximine active ingredient, a polyalkylene carbonate solvent system, an alkoxylated alcohol surfactant, and an ethoxylated castor oil surfactant, which enhance solubility and persistence in the air column, improving contact with flying mosquitoes and increasing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-solvent system is used with sulfoximine as the active ingredient, then the formulation is simpler to manufacture, but the solubility and efficacy of the active ingredient are insufficient
Solution Approach 1:
The patent employs a multi-solvent system comprising propylene carbonate, ethyl lactate, and either dimethyl carbonate or ethyl methyl carbonate. This composite solvent formulation resolves the solubility limitations of single-solvent systems while maintaining manufacturability. The synergistic interaction between these solvents enhances the dissolution of sulfoximine active ingredients, achieving both reliability in solubility and ease of manufacture.
2Ease of operation
If conventional pesticide formulations are used for ULV application, then the application process is straightforward, but the aerosol persistence in the air column is insufficient for effective mosquito contact
Solution Approach 1:
The patent modifies the physical-chemical parameters of the formulation by incorporating specific solvent combinations and surfactants (alkoxylated alcohol and ethoxylated castor oil). These parameter changes optimize droplet size distribution, evaporation rate, and suspension stability, thereby extending aerosol persistence in the air column while maintaining ease of ULV application. The formulation achieves prolonged airborne presence without complicating the application process.
3Reliability
If the active ingredient concentration is increased to improve efficacy, then mosquito mortality rate increases, but the solubility limitations of sulfoximine are exceeded
Solution Approach 1:
The patent utilizes a composite multi-solvent system that significantly expands the solubility capacity for sulfoximine active ingredients. This enables formulation at higher active ingredient concentrations (e.g., 1-10% w/v) while maintaining complete dissolution. The synergistic solvent combination ensures both high efficacy through increased active ingredient content and adequate solubility, resolving the contradiction between mortality rate and solubility limits.
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 compositions demonstrate high mortality rates (up to 90% after 48 hours) and effective droplet formation for aerial applications, ensuring prolonged air presence and effective mosquito control.
Implementation Method 1
a solvent system including a polyalkylene carbonate solvent and a second solvent
Implementation Method 2
a first surfactant that may be an alkoxylated alcohol, and a second surfactant that may be an ethoxylated castor oil
Implementation Method 3
the aerosol should persist in the air column for an appreciable length of time at suitable droplet densities
Data Source
AI summary
Insecticidal compositions may include an active ingredient, a solvent system, a first surfactant, and a second surfactant. The active ingredient may include a sulfoximine. The solvent system may include a polyalkylene carbonate solvent and a second solvent. The first surfactant may be an alkoxylated alcohol. The second surfactant may be an ethoxy lated castor oil. Methods for insect control may include contacting a population of insects with an insecticidal composition. In some aspects, insecticidal compositions are particularly suited for use against mosquitos.