Vaporized Pyrethrin and P-Menthane-3,8-Diol Repellent
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Solution Overview
Problem
Current insect repellents often result in mosquito mortality, which can have side effects on humans and harm the environment, and they typically require topical application or burning, which is undesirable.
Innovation Solution
A spatial pest repellent composition combining pyrethrins and p-menthane-3,8-diol, vaporized to effectively repel mosquitoes without causing mortality, using a combination of pyrethrins (0.1-4.5% by weight), p-menthane-3,8-diol (5-20% by weight), isopropyl myristate, hydrocarbon solvent, and antioxidant, achieving at least 80% landing inhibition within 15 minutes and reducing room entry by 10-79%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional insecticides are used to repel mosquitoes, then repellency is achieved, but mosquito mortality increases causing harm to humans and environment
Solution Approach 1:
The patent changes the chemical parameters of the repellent composition by using pyrethrins (0.1-4.5% by weight) combined with p-menthane-3,8-diol (5-20% by weight) instead of traditional insecticides. This parameter change maintains repellency while reducing mosquito mortality to less than 10%, thereby resolving the contradiction between effective repellency and harmful mortality effects
Solution Approach 2:
The patent creates a composite repellent formulation combining pyrethrins and p-menthane-3,8-diol in specific proportions. This composite material provides both spatial repellency and reduced insect mortality compared to single-component insecticides, addressing the contradiction by integrating multiple functional components
2Reliability
If topical application or burning methods are used to dispense repellent compositions, then pest repulsion is achieved, but device complexity and safety precautions increase
Solution Approach 1:
The patent extracts the active repellent components (pyrethrins and p-menthane-3,8-diol) from complex dispensing systems and presents them in a simplified composition form. This allows the repellent to be applied directly without requiring candles, coils, or aerosol mechanisms, thereby reducing device complexity while maintaining pest repulsion effectiveness
Solution Approach 2:
The repellent composition is formulated to provide passive, continuous protection when applied to surfaces or fabrics. The composition serves itself by releasing active ingredients over time without requiring active dispensing mechanisms, burning structures, or automated spray systems, thus eliminating the need for complex device infrastructure
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 significant mosquito repellency with less than 10% mortality 24 hours post-exposure, effectively inhibiting landing and reducing room entry without the harmful effects associated with traditional insecticides.
Implementation Method 1
there is also a need in the pest control market to provide insect repellents that are active upon vaporization
Data Source
AI summary
Disclosed herein are spatial insect repellent compositions comprising pyrethrins and p-menthane-3,8-diol. Room entry of Aedes albopictus and Culex quinquefasciatus mosquitos is reduced by at least about 10% after exposure to the vaporized composition. Within 24 hours after exposure to the vaporized composition, Aedes albopictus and Culex quinquefasciatus mosquitos experience about ≤10% mortality.