Organic-Inorganic UV Blocking Composition With Reduced Whitening
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Solution Overview
Problem
Existing UV blocking agents, particularly inorganic agents like titanium dioxide and zinc oxide, suffer from limitations such as inadequate absorption of UVA1 wavelengths, visible whitening, and photocatalytic degradation of organic materials, leading to formulation stiffness and poor spreadability.
Innovation Solution
A UV blocking cosmetic composition is developed using an organic-inorganic complex formed from terephthalylidene dicamphor sulfonic acid and titanium dioxide, combined with organic and inorganic thickeners to reduce whitening and aggregation phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic UV blocking agents (titanium dioxide, zinc oxide) are used, then UV blocking ability and safety are improved, but whitening phenomenon and formulation stiffness occur
Solution Approach 1:
The patent creates an organic-inorganic hybrid complex by combining terephthalylidene dicamphor sulfonic acid (organic UV filter) with titanium dioxide (inorganic UV filter). This composite structure integrates the advantages of both materials: the organic component provides broad-spectrum UV absorption with minimal whitening, while the inorganic component contributes to UV blocking stability and safety. The synergistic interaction between organic and inorganic phases resolves the contradiction between UV blocking efficacy and cosmetic acceptability.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the UV blocking system by controlling the particle size, surface treatment, and composition ratio of the organic-inorganic complex. By adjusting these parameters, the formulation achieves reduced whitening effect and improved spreadability while maintaining high UV blocking ability. The surface treatment of titanium dioxide particles and the specific molecular structure of the organic component are optimized to minimize light scattering in the visible range while maximizing UV absorption.
2Reliability
If inorganic UV blocking agents are used, then safety and blocking ability are improved, but photocatalytic degradation of organic materials occurs
Solution Approach 1:
The patent converts the potentially harmful photocatalytic activity of titanium dioxide into a beneficial effect by carefully controlling the organic-inorganic interaction. The organic component (terephthalylidene dicamphor sulfonic acid) forms a stable complex with titanium dioxide that modulates the photocatalytic activity. Instead of allowing uncontrolled degradation of formulation ingredients, the complex structure directs the photocatalytic action toward enhanced UV blocking performance and improved formulation stability.
3Reliability
If organic UV blocking agents are used, then absorption wavelengths and less whitening are achieved, but skin penetration and irritation occur
Solution Approach 1:
The patent merges the UV absorption capabilities of organic filters with the safety profile of inorganic filters in a single hybrid complex. The organic-inorganic combination allows the system to achieve broad-spectrum UV absorption (covering both UVA and UVB ranges) while the inorganic titanium dioxide component provides a barrier that prevents excessive penetration of organic molecules into the skin. This merging of functionalities resolves the contradiction between absorption efficiency and skin safety.
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 efficacy with reduced whitening and aggregation, ensuring stable formulation and smooth application, maintaining high SPF values and emulsion stability.
Implementation Method 1
The chemical blocking agent absorbs the UV rays to prevent the UV rays from penetrating into the skin
Implementation Method 2
The physical blocking agent scatters UV rays to prevent the UV rays from penetrating into the skin
Implementation Method 3
The organic UV blocking agent typically includes chemical blocking agents that convert light into heat
Implementation Method 4
the inorganic UV blocking agent typically includes physical blocking agents that reflect, scatter, and absorb light
Implementation Method 5
the energy band gaps of titanium dioxide and zinc oxide are 3.0 eV and 3.2 eV, respectively, which are advantageous for absorbing UVB and UVA2
Implementation Method 6
titanium dioxide and zinc oxide have a strong photocatalytic ability to degrade or denature organic materials, particularly pigments, under light energy
Data Source
Figure 1~2
AI summary
The present disclosure relates to a cosmetic composition including a UV blocking material consisting of an organic-inorganic complex, an organic thickener, and an inorganic thickener, and more particularly, to a UV blocking cosmetic composition including a novel UV blocking material in the form of an organic-inorganic complex formed from terephthalylidene dicamphor sulfonic acid, which is a water-soluble organic UV blocking agent, and titanium dioxide, which is an inorganic UV blocking agent. The cosmetic composition for UV blocking according to the present disclosure contains a novel UV blocking agent in the form of an organic-inorganic complex, thereby having an excellent UV blocking effect, and has a reduced whitening phenomenon and aggregation phenomenon, and thus can be usefully used as a cosmetic composition for UV blocking.