UV-Blocking Cosmetic Composition with Heat-Enhanced Efficiency
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Solution Overview
Problem
UV blocking agents experience a decrease in ultraviolet blocking efficiency due to heat, leading to reduced effectiveness in blocking UV rays and potentially causing skin aging and diseases, as they deteriorate in photostability and moisture exposure.
Innovation Solution
A method using a self-emulsifying polymer and a polyol with an IOB value of 5.0 or less, which enhances UV blocking efficiency by preparing a water phase with the polymer and a UV blocking agent in an oil phase, then applying heat to create a stable emulsion that spreads the UV blocking agent uniformly, increasing its effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV blocking agents are used in cosmetic compositions, then UV blocking efficiency is achieved, but the blocking efficiency decreases due to heat exposure
Solution Approach 1:
The patent applies heat treatment (40-60°C for 1-24 hours) to the cosmetic composition, which converts the harmful thermal effect that normally degrades UV blocking agents into a beneficial process. This heat treatment causes the self-emulsifying polymer to form a gel structure that entraps the UV blocking agent, preventing its degradation and actually enhancing its UV blocking efficiency compared to untreated compositions
Solution Approach 2:
The patent changes the physical state of the self-emulsifying polymer from a liquid or semi-solid state at room temperature to a gel state through heat treatment. This parameter change (temperature-induced phase transition) transforms the polymer's structure to create a stable network that protects and enhances the UV blocking agent's performance
2Reliability
If UV blocking agents are applied to skin, then UV protection is provided, but the blocking film deteriorates due to moisture
Solution Approach 1:
The self-emulsifying polymer acts as an intermediary between the UV blocking agent and the external environment (moisture). When heated, this polymer forms a gel structure that serves as a protective matrix, physically separating and protecting the UV blocking agent from moisture while maintaining its UV blocking function
Solution Approach 2:
The patent creates a composite system where the self-emulsifying polymer forms a gel matrix that encapsulates the UV blocking agent. This composite structure combines the protective properties of the polymer gel with the UV blocking properties of the embedded agent, providing both UV protection and resistance to moisture degradation
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 method significantly increases the UV blocking efficiency of UV blocking agents by heat, resulting in a higher SPF value, even under UV irradiation, by ensuring the UV blocking agent remains effective and spreads uniformly across the skin, thus preventing skin damage.
Implementation Method 1
preparing a water phase with the polymer and a UV blocking agent in an oil phase, then applying heat to create a stable emulsion that spreads the UV blocking agent uniformly
Implementation Method 2
applying heat to the mixed composition
Data Source
AI summary
The present disclosure relates to a composition for increasing ultraviolet blocking efficiency of an ultraviolet blocking agent by heat. In general, the UV blocking efficiency of the UV blocking agent is reduced by heat, but the present disclosure shows an unexpected effect in that the UV blocking efficiency of the UV blocking agent is increased by heat.