Controlled-Release PMD Repellent Formulation for Long-Duration Protection
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Solution Overview
Problem
Current insect repellents with synthetic active ingredients have short durations, are volatile, and require frequent application, leading to issues like toxicity, irritancy, and resistance, while natural alternatives are too volatile for effective long-term use.
Innovation Solution
A formulation combining p-menthane-3,8-diol (PMD) isomers, a glycoside, an organic acid, and a divalent metal halide salt, which provides a controlled release of PMD isomers for extended insect repellency, reducing the need for frequent application and minimizing odor and irritancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If natural insect repellents are used, then health safety is improved, but duration of action deteriorates due to high volatility
Solution Approach 1:
The patent uses a metal complex as an intermediary carrier that binds to the natural repellent molecule (PMD). This complex acts as a mediator that controls the release rate of the repellent, preventing rapid evaporation while maintaining safety. The metal complex structure allows controlled degradation to release PMD gradually over extended periods.
Solution Approach 2:
The patent changes the physical-chemical parameters of the repellent system by forming a metal complex. This complexation modifies the volatility and release characteristics of PMD, transforming it from a rapidly evaporating natural repellent into a controlled-release system that maintains effective concentration over longer durations while preserving the safety profile of natural ingredients.
2Duration of action of moving object
If synthetic insect repellents are used, then duration of action is improved, but harmful effects worsen due to toxicity and irritancy
Solution Approach 1:
The metal complex serves as an intermediary that delivers natural repellent molecules in a controlled manner. This prevents the need to use high concentrations of synthetic repellents to achieve long duration, thereby avoiding their associated toxicity and irritancy issues while maintaining extended protection through controlled release of safe natural ingredients.
Solution Approach 2:
By changing the delivery mechanism to a metal complex-based controlled release system, the patent enables the use of natural repellents at effective concentrations that provide long duration without the harmful effects of synthetic alternatives. The complexation and controlled degradation parameters allow sustained release at safe concentrations.
3Reliability
If frequent application of repellent is required, then protection effectiveness is maintained, but user convenience deteriorates due to busy lifestyles
Solution Approach 1:
The metal complex acts as a long-lasting intermediary carrier that maintains effective repellent concentrations on the skin for extended periods. This eliminates the need for frequent reapplication, making the system more convenient for users with busy lifestyles while preserving continuous protection effectiveness through controlled release over many hours.
Solution Approach 2:
The patent achieves continuous useful action by designing a controlled release system that maintains effective repellent concentrations over extended periods. The metal complex degrades gradually to provide uninterrupted protection, eliminating gaps between applications and ensuring continuous effectiveness without requiring frequent user intervention.
4Reliability
If increased concentration of active ingredient is applied, then protection effectiveness is improved, but harmful effects worsen due to toxicity and irritancy
Solution Approach 1:
The metal complex serves as a controlled-release intermediary that provides effective protection through gradual degradation and release of natural repellent molecules. This controlled mechanism maintains effective concentrations over time without requiring high initial doses, thereby achieving protection effectiveness while avoiding toxicity and irritancy associated with high concentrations of active ingredients.
Solution Approach 2:
The patent changes the release parameters by using metal complexation, which controls the rate at which the active ingredient is released. This parameter change allows effective concentrations to be maintained over extended periods through controlled degradation, avoiding the need to apply high concentrations that would cause toxicity and irritancy while preserving continuous protection 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 formulation achieves almost complete protection with low application rates, maintaining a long-duration effect and reducing the concentration of active ingredients, thus minimizing health risks and environmental impact.
Implementation Method 1
Topical and spatial repellents are volatile molecules that, upon evaporation, provide a protective zone above the skin or in the surrounding area that prevents mosquitos from landing and/or biting
Data Source
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AI summary
The present invention relates to a formulation. It exhibits a long-duration insect repellent effect. It relates also to the use of said repellent formulation, to said formulation for use as a medicament, to a method of use thereof, and to a composition comprising said formulation.