Emulsifiable Concentrate Solvent System for Bifenthrin
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Solution Overview
Problem
Existing emulsifiable concentrates for insecticides like bifenthrin often use aromatic hydrocarbons as solvents, which pose health and environmental risks and have limited solubility, necessitating the development of alternative solvents that can dissolve more than 25% of the active ingredient without adverse effects.
Innovation Solution
A composition comprising more than 25 wt% of an aromatic hydrocarbon soluble compound, such as bifenthrin, combined with ethylene glycol n-butyl ether benzoate or glycol alkyl ether esters with specific Hansen parameters, eliminating aromatic hydrocarbon solvents and enhancing solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If aromatic hydrocarbons (xylene, naphthalene) are used as solvents in emulsifiable concentrates, then the active ingredient can be solubilized, but adverse health effects and environmental damage occur
Solution Approach 1:
The patent changes the chemical parameters of the solvent system by replacing aromatic hydrocarbons with aliphatic solvents (isoparaffins, olefins, esters) that have different molecular structures and properties. This parameter change maintains solubility functionality while eliminating the harmful aromatic components, directly resolving the contradiction between solubility and health safety
Solution Approach 2:
The patent employs readily available aliphatic solvents that can be easily produced and replaced, serving as temporary substitutes for aromatic hydrocarbons. These solvents achieve the solubility function without the long-term environmental persistence and toxicity of aromatic compounds, allowing for safe degradation and replacement in the environment
2Quantity of substance
If aromatic hydrocarbon solvents are used, then the concentrate can be formulated, but the solubility of active ingredients remains limited to less than 25%
Solution Approach 1:
The patent uses composite solvent systems combining multiple aliphatic solvents (isoparaffins, olefins, esters) that work synergistically to achieve enhanced solubility of active ingredients. This composite approach allows the formulation to dissolve more than 25% of the active ingredient while maintaining overall formulation simplicity and stability
3Object-affected harmful factors
If alternative solvents without aromatic hydrocarbons are used, then health and environmental risks are reduced, but achieving solubility of more than 25% of active ingredient becomes difficult
Solution Approach 1:
The patent employs aliphatic solvent compounds that serve multiple functions simultaneously: they act as solvents for the active ingredient, provide emulsification support, and ensure formulation stability. This multi-functionality allows non-aromatic solvents to achieve solubility of more than 25% of the active ingredient while maintaining all necessary formulation properties without aromatic hydrocarbons
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 solution provides a stable emulsifiable concentrate that is free of aromatic hydrocarbon solvents, achieving solubility of bifenthrin at 30 wt% or greater, thereby reducing health and environmental risks while improving solubility and stability.
Implementation Method 1
a second component comprising: (1) from greater than 25 wt% to less than 75 wt% of an ethylene glycol n-butyl ether benzoate, or (2) from greater than or equal to 45 wt% to less than or equal to 65 wt% of a glycol alkyl ether ester having a polar Hansen parameter from 3.5 to 5.6 (J/cc) 1/2
Data Source
AI summary
Emulsifiable compositions comprise: (A) a first component comprising more than 25 wt% of an aromatic hydrocarbon soluble compound, e.g., a pyrethroid, and (B) a second component comprising 25 to less than 75 wt% of at least one of: (1) a propylene glycol methyl ether propionate, (2) an ethylene glycol n-butyl ether benzoate, (3) dipropylene glycol diacetate, and (4) a glycol alkyl ether ester having a polar Hansen parameter from 3.5 to 5.6 (J/cc)1/2 and a hydrogen bonding Hansen parameter from 8 to 9.2 (J/cc)1/2. embodiment the compositions are free of an aromatic hydrocarbon solvent.