Heat-Responsive Emulsion Cosmetic for Stronger UV Protection
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Solution Overview
Problem
Existing cosmetics fail to maintain or enhance ultraviolet protection effects when exposed to heat, despite previous focus on light and moisture resistance.
Innovation Solution
An emulsion cosmetic formulation comprising an ultraviolet protectant, a polyhydric alcohol with an IOB value of 5.0 or lower, and an ester oil with an IOB value of 0.3 or higher, which increases ultraviolet protection effects when heated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ultraviolet protection formulations are used, then ultraviolet protection effects are provided immediately after application, but the protection effects decrease when exposed to heat
Solution Approach 1:
The patent changes the chemical parameters of the formulation by selecting specific polyhydric alcohols with IOB ≤ 5.0 and specific ester oils with IOB ≥ 0.3, which have unique thermal stability properties that prevent degradation of ultraviolet protection effects under heat exposure
Solution Approach 2:
The patent creates a composite formulation system combining ultraviolet protectants with specifically selected polyhydric alcohols and ester oils, where the composite works synergistically to maintain stability under thermal conditions that would normally degrade individual components
2Reliability
If ultraviolet absorbing agents are used to provide sun protection, then ultraviolet protection effects are achieved, but photodegradation occurs reducing protection performance
Solution Approach 1:
The patent applies beforehand cushioning by incorporating stabilizing agents (specific polyhydric alcohols and ester oils) that prevent photodegradation before it occurs, creating a protective environment for the ultraviolet absorbents that maintains their efficacy throughout the product's shelf life and usage period
3Ease of operation
If conventional emulsion formulations are used, then cosmetic performance is provided, but heat causes degradation of components reducing protection effects
Solution Approach 1:
The patent modifies the physical and chemical parameters of the emulsion formulation by selecting ingredients with specific IOB values, which changes the thermal behavior of the system from heat-sensitive to heat-stable, allowing the cosmetic to maintain both performance and reliability under thermal 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 formulation significantly enhances ultraviolet protection effects upon exposure to heat, contrary to conventional expectations, with a thermal reaction rate exceeding 100%.
Implementation Method 1
an emulsion cosmetic having the unprecedented property in which heating increases the ultraviolet protection effects over those immediately after applying the cosmetic
Data Source
AI summary
Provided is an emulsion cosmetic having the innovative, unprecedented property in which the ultraviolet protection effects do not decrease, and conversely increase, due to heat applied in a usage environment. The present invention pertains to an emulsion cosmetic comprising (A) an ultraviolet protectant, (B) a polyhydric alcohol having an IOB value of 5.0 or lower, and (C) an ester oil having an IOB value of 0.3 or higher.