Rinse-off Cleansing Composition Microemulsion Perfume Delivery
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Solution Overview
Problem
Current skin cleansing compositions fail to effectively deliver perfume scent during use and retain residual scent on the skin due to solubilization of perfume in surfactant micelles, leading to inefficient perfume delivery and short-lasting scent.
Innovation Solution
Formulating a liquid rinse-off cleansing composition that includes a surfactant mixture with a branched anionic surfactant, a hydric solvent, and a perfume, which forms a microemulsion phase during use, allowing perfume to exist in a central core region and maintain a higher activity coefficient, enhancing initial perfume perception and long-lasting scent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perfume is solubilized in surfactant micelles for cleansing, then the composition can provide cleansing function, but perfume delivery efficiency decreases and scent duration shortens
Solution Approach 1:
The invention segments the micellar structure by introducing a liquid crystalline phase that creates distinct regions within the surfactant assembly. This segmentation allows perfume to be localized in specific domains rather than uniformly distributed, enhancing its activity coefficient and delivery efficiency while maintaining cleansing function.
Solution Approach 2:
The invention creates a composite structure by combining surfactants with liquid crystalline formers to generate a complex micellar phase. This composite material approach produces a structured assembly that simultaneously provides effective cleansing and enhanced perfume retention, resolving the contradiction between cleansing reliability and perfume delivery efficiency.
2Illumination intensity
If perfume concentration is increased for better scent perception, then initial perfume perception improves, but composition stability deteriorates
Solution Approach 1:
The invention changes the physical state parameters of the surfactant system by inducing liquid crystalline phase formation. This parameter change creates a structured environment that can accommodate higher perfume concentrations without phase separation or precipitation, thus improving perfume perception while maintaining composition stability.
Solution Approach 2:
The invention utilizes phase transition from conventional micellar solution to liquid crystalline phase. This phase transition creates a more ordered structure with defined domains that can stably incorporate higher amounts of perfume, resolving the contradiction between perfume perception intensity and composition stability.
3Device complexity
If traditional surfactant-based composition is used, then formulation simplicity is maintained, but perfume activity coefficient remains low
Solution Approach 1:
The invention introduces liquid crystalline formers as intermediary substances that mediate between the surfactant and perfume. This intermediary creates a structured environment that enhances perfume activity coefficient without significantly complicating the overall formulation, as the liquid crystalline phase forms spontaneously under mild conditions.
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 delivers enhanced initial perfume perception and retention on the skin for several hours after cleansing, overcoming the limitations of traditional surfactant-based compositions by forming a microemulsion that increases perfume activity and stability.
Implementation Method 1
forms a microemulsion phase during use, allowing perfume to exist in a central core region and maintain a higher activity coefficient
Data Source
AI summary
Rinse-off cleansing compositions can include surfactant, perfume, solvent, thickener, and water.