Volatile Insecticide Cyclodextrin Complex for Long-Term Stability
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Solution Overview
Problem
Conventional insecticidal compositions with volatile active ingredients face challenges in maintaining long-term effectiveness due to chemical-physical properties, particularly on porous and alkaline surfaces, and are affected by temperature, UV, and rain, leading to short-term pest control efficacy.
Innovation Solution
An aqueous composition combining at least one insecticide with a vapor pressure of 0.001 mPa at 20°C, cyclodextrin, and a polymer dispersion, where the polymer dispersion is obtained by polymerizing a monomer mixture in the presence of a hydrocolloid, providing improved stability and prolonged release of the active ingredient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If volatile insecticides are used in conventional formulations, then immediate pest control effectiveness is achieved, but long-term stability and duration of action are reduced
Solution Approach 1:
The volatile insecticide is nested within the cyclodextrin inclusion complex, where the insecticide molecule is encapsulated in the cyclodextrin cavity. This nested structure protects the volatile compound from rapid evaporation while allowing controlled release, thereby extending duration of action without sacrificing immediate effectiveness
Solution Approach 2:
Cyclodextrin acts as an intermediary substance between the volatile insecticide and the environment. It mediates the release of the active ingredient, controlling evaporation rate and providing sustained availability while maintaining the insecticide's biological activity
2Area of stationary object
If spray coating is applied to porous and alkaline surfaces, then surface coverage is achieved, but effectiveness duration is severely impaired
Solution Approach 1:
The formulation creates a composite system combining cyclodextrin inclusion complexes with polymer dispersion and aqueous carriers. This composite material adheres to porous and alkaline surfaces while the cyclodextrin complex protects the insecticide from degradation, maintaining effectiveness duration despite surface challenges
Solution Approach 2:
The cyclodextrin inclusion complex changes the physical-chemical parameters of the insecticide, reducing its volatility and improving its adhesion properties. This parameter modification allows the formulation to maintain effectiveness on porous and alkaline surfaces where conventional formulations fail
3Reliability
If conventional formulations are exposed to environmental factors (temperature, UV, rain), then initial pest control is achieved, but active ingredient effectiveness is quickly lost
Solution Approach 1:
The cyclodextrin inclusion complex provides beforehand cushioning protection to the volatile insecticide against environmental stressors. The complex structure shields the active ingredient from temperature fluctuations, UV radiation, and rain, preventing premature degradation while maintaining initial pest control effectiveness
Solution Approach 2:
Cyclodextrin serves as a protective intermediary between the insecticide and environmental factors. It mediates the interaction by absorbing environmental stress and releasing it gradually, protecting the active ingredient from direct exposure to temperature, UV, and moisture while sustaining its effectiveness
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 achieves enhanced long-term biological activity, improved knock-down and mortality of insects, and increased durability against environmental influences like temperature, UV, and rain, with excellent chemical stability and compatibility with various surfaces.
Implementation Method 1
SAENGER was able to show that cyclodextrins can be used to bind highly volatile substances... Inclusion complexes of allethrin, resmethrin and pyrethrins in β-cyclodextrin are described
Implementation Method 2
SCENE et al. were able to show that volatile insecticides can be complexed with (β-cyclodextrin... The complexation of an active ingredient with cyclodextrin could also lead to a delayed or prolonged release
Data Source
AI summary
The invention relates to aqueous compositions containing volatile insecticides, which have improved long term stability and are therefore also biologically active for a longer period. The invention also relates to the use of such formulations for lasting control of animal pests (arthropods) on different surfaces.