Personal Care Composition with Segmented Benefit Phases for Skin Deposition
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Solution Overview
Problem
Current personal care compositions face challenges in effectively depositing skin benefit agents while maintaining cleansing performance, as surfactants tend to remove both unwanted and beneficial components from the skin, leading to dryness and poor deposition of high viscosity benefit agents like petrolatum.
Innovation Solution
A personal care composition with a structured cleansing phase and two separate benefit phases, where the high viscosity benefit agent (e.g., petrolatum) and low viscosity benefit agent (e.g., soybean oil) are maintained in distinct physical domains, enhancing deposition by maintaining larger particle sizes and surface area contact with the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If surfactants are used to cleanse the skin, then dirt and debris are removed, but lipid and moisture are also removed causing dryness
Solution Approach 1:
The personal care composition is divided into multiple distinct phases: a surfactant-containing cleansing phase and separate benefit phases containing lipid and moisture agents. This segmentation allows the cleansing phase to remove dirt while the separate benefit phases deposit protective lipids and moisture without being removed by the surfactant, thus resolving the contradiction between effective cleansing and preventing dryness.
Solution Approach 2:
The benefit phases act as intermediaries that bridge the cleansing function and the protective function. These phases contain deposition aids and polymers that facilitate the attachment of lipid and moisture agents to the skin, preventing their removal by surfactants and thus protecting against dryness while maintaining cleansing effectiveness.
2Object-affected harmful factors
If high viscosity benefit agents like petrolatum are added to improve skin protection, then lipid barrier is enhanced, but deposition on skin is poor due to rinse-off nature
Solution Approach 1:
The patent introduces deposition aids and polymers as intermediaries that facilitate the attachment of high viscosity benefit agents like petrolatum to the skin. These intermediaries enable the petrolatum to adhere to the skin surface even in rinse-off products, significantly improving deposition efficiency while maintaining the skin protective function.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the benefit phase by controlling particle size (50 μm or more) and incorporating specific polymers and deposition aids. These parameter changes enable high viscosity agents like petrolatum to maintain stability in the formulation and achieve improved deposition on the skin despite the rinse-off application method.
3Object-affected harmful factors
If benefit materials are deposited on skin to replace removed lipid, then skin protection is improved, but deposition is ineffective in rinse off products
Solution Approach 1:
The patent employs deposition aids and polymers as intermediaries that ensure reliable deposition of benefit materials on the skin. These intermediaries create strong adhesion between the benefit phase and skin surface, making the deposition process reliable and consistent even in rinse-off products where the product is quickly washed away.
Solution Approach 2:
The formulation is designed to facilitate preliminary deposition of benefit materials before the rinse-off action removes the product. The deposition aids and polymers work during the brief contact time to ensure benefit materials are already attached to the skin, making the deposition reliable despite the short residence time of rinse-off products.
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
This approach significantly enhances the deposition of benefit agents, with petrolatum deposition increasing from 70 μg/cm² to 270-350 μg/cm², while maintaining cleansing performance and avoiding skin greasiness.
Implementation Method 1
a first hydrophobic benefit phase having an average particle size of about 50 μm or more and comprising from about 0.1% to about 20%, by the weight of the personal care composition, of a high viscosity benefit agent; and c) a second benefit phase having an average particle size of about 10 μm or less and comprising from about 0.1% to about 20%, by the weight of the personal care composition, of a low viscosity benefit agent
Implementation Method 2
significantly enhances the deposition of benefit agents, with petrolatum deposition increasing from 70 μg/cm² to 270-350 μg/cm²
Data Source
AI summary
A personal care composition includes a structured cleansing phase and two separate benefit phases, wherein the first benefit phase containing a high viscosity benefit agent with an average particle size of about 50 μm to about 500 μm, wherein the second benefit phase comprises a low viscosity benefit agent with an average particle size of about 0.5 μm to about 10 μm.