Transparent UV Cosmetic Composition With Emulsifier-Free Bicontinuous Phases
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Solution Overview
Problem
There is a growing demand for UV-blocking cosmetics that provide natural, transparent skin expression without a white cast, while effectively blocking UV rays and maintaining skin texture care for various ethnicities.
Innovation Solution
A transparent cosmetic composition is developed by mixing a water phase and an oil phase with adjusted viscosities, incorporating water-dispersible and oil-dispersible organic UV blocking agents, powders, and gelling agents to form a bicontinuous phase without an emulsifier, ensuring transparency and UV protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a white cast UV blocking product is used, then UV protection is achieved, but natural skin expression is compromised
Solution Approach 1:
The patent changes the physical-chemical parameters of the cosmetic composition by adjusting the viscosity ratio between water phase and oil phase to create a transparent formulation. Specifically, the water phase viscosity is controlled at 10-100 cP and oil phase viscosity at 100-1000 cP, enabling light transmission while maintaining UV blocking functionality through carefully selected transparent UV filters.
Solution Approach 2:
The patent employs a composite formulation combining water-dispersible organic UV blocking agents (1-10 wt%) and oil-dispersible organic UV blocking agents (1-10 wt%) within a bicontinuous phase system. This composite approach provides broad-spectrum UV protection while maintaining transparency, eliminating the need for traditional white-pigmented sunscreen formulations.
2Stability of the object's composition
If emulsifier is added to mix water and oil phases, then homogeneity is improved, but formulation stability and water resistance are worsened
Solution Approach 1:
The patent extracts and eliminates emulsifiers from the formulation entirely. Instead, it relies on the inherent viscosity balance between water phase (10-100 cP) and oil phase (100-1000 cP) to maintain a stable bicontinuous structure. This emulsifier-free approach inherently provides superior water resistance while maintaining phase homogeneity through careful viscosity control.
Solution Approach 2:
The patent changes the viscosity parameters of both phases to achieve spontaneous mixing and stable bicontinuous structure without emulsifiers. The water phase viscosity is optimized at 10-100 cP and oil phase at 100-1000 cP, creating a stable formulation that resists water penetration while maintaining homogeneous appearance.
3Illumination intensity
If transparent UV blocking agents are used, then skin transparency is improved, but UV blocking efficacy is worsened
Solution Approach 1:
The patent uses a composite system of both water-dispersible organic UV blocking agents (1-10 wt%) and oil-dispersible organic UV blocking agents (1-10 wt%). This dual-phase UV filter system provides comprehensive UV protection across different wavelengths while maintaining formulation transparency, as each agent type contributes to broad-spectrum coverage without requiring opaque pigments.
Solution Approach 2:
The patent optimizes the concentration parameters of transparent UV blocking agents within specific ranges (1-10 wt% for both water and oil dispersible types). This parameter optimization ensures sufficient UV blocking efficacy is achieved while maintaining the transparent aesthetic quality of the formulation.
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 achieves excellent UV blocking, maintains transparency, and provides stable formulation with enhanced water resistance, addressing the need for natural-looking UV protection.
Implementation Method 1
adjusting the viscosities of the water and oil phases
Implementation Method 2
the composition may allow the water phase part and the oil phase part to be mixed to form a bicontinuous phase
Implementation Method 3
UV-A is known to penetrate into the dermis of the skin, cause skin cancer, and promote wrinkles and melanin formation... In order to prevent or ameliorate the above-described skin diseases associated with sun exposure, consumers are increasingly interested in UV blocking products
Data Source
AI summary
A cosmetic composition including a water phase part and an oil phase part, wherein the water phase part and the oil phase part are mixed, and the cosmetic composition is a transparent formulation. Specifically, the cosmetic composition of the present disclosure is prepared in a transparent formulation in which the water phase and the oil phase form a bicontinuous phase without an emulsifier, and does not cause white cast due to a UV blocking agent when applied to the skin.