Arthropoda Repellent Composition with Controlled Release
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Solution Overview
Problem
Current insect repellents face challenges such as rapid evaporation, skin absorption, skin irritation, and lack of long-lasting effectiveness, especially when exposed to water or high temperatures, and often result in a greasy feel and staining.
Innovation Solution
A composition combining Icaridin, PMD, and PPG-20 methyl glucose ether, optionally with additional repellents and polyols, to create a non-irritating, non-staining, and long-lasting repellent with controlled release, balancing solubility and skin penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If volatile insect repellents are used to provide effective repellent effect, then repellent efficacy is improved, but evaporation rate increases causing rapid disappearance from skin surface
Solution Approach 1:
The patent modifies the physical-chemical parameters of the repellent formulation by incorporating it into a polymer matrix, changing the evaporation rate parameter to achieve controlled release while maintaining efficacy
Solution Approach 2:
The invention creates a composite material system combining volatile repellent compounds with polymer carriers, where the polymer matrix controls the release characteristics while the volatile components provide the repellent effect
2Reliability
If ethanol is used as co-solvent to enhance skin penetration, then active ingredient absorption is improved, but skin irritation and allergic reactions increase
Solution Approach 1:
The patent introduces an intermediary substance (polymer matrix or alternative carrier) that facilitates skin penetration without requiring high concentrations of irritating ethanol, thereby reducing harmful skin effects while maintaining absorption efficacy
3Reliability
If DEET is used as insect repellent to provide strong repellent effect, then repellent efficacy is improved, but staining of clothing and plastics occurs
Solution Approach 1:
The polymer matrix acts as an intermediary carrier that delivers DEET to the skin surface in a controlled manner, reducing direct contact with clothing and plastics while maintaining repellent efficacy through sustained skin surface concentration
4Duration of action of stationary object
If repellent formulation is made water-resistant to prevent washing away, then repellent duration is improved, but skin irritation may increase
Solution Approach 1:
The patent adjusts the formulation parameters by incorporating hydrophilic polymers that provide water resistance through hydrogen bonding, creating a protective matrix that prevents wash-off while maintaining skin compatibility through controlled release characteristics
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 provides extended protection against insects and ticks, lasting up to 12 hours with improved skin compatibility and reduced evaporation, outperforming single repellents in efficacy and duration.
Implementation Method 1
the evaporation of the insect repellent is directly related to the ambient temperature, body temperature and wind velocity
Implementation Method 2
approximately 50 percent of a topically applied dose is absorbed by the skin in six hours with peak plasma levels being reached in 1 hour
Data Source
AI summary
The present invention refers to an Arthropoda repellent composition providing long-term protection, in particular against insects and ticks.