Topical Polar Oil Composition With Micronized UV Powder for Low Transfer
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Solution Overview
Problem
Sun care products with high SPF and UVA protection often exhibit unpleasant sensorial properties due to high oil content, and they transfer easily to other surfaces, causing contamination and aesthetic issues.
Innovation Solution
Topical compositions comprising polar oils combined with micronized 1,4-di(benzoxazol-2'-yl)benzene particles of 50 to 300 nm size significantly reduce material transfer to contacted surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amounts of polar oils are used to solubilize UV-filters for high SPF and UVA protection, then UV protection efficacy is improved, but sensorial properties deteriorate and material transfer to surfaces increases
Solution Approach 1:
The patent introduces micronized 1,4-di(benzoxazol-2'-yl)benzene particles as an intermediary substance that interacts with the polar oils to reduce their transfer tendency. These microparticles act as a mediator between the oil phase and the skin/surfaces, modifying the rheological properties and adhesion characteristics of the formulation without compromising UV filter solubilization or protection efficacy.
Solution Approach 2:
The patent applies parameter changes by controlling the particle size of 1,4-di(benzoxazol-2'-yl)benzene within a specific range (50-300 nm, preferably 100-200 nm) and optimizing its concentration (0.1-10 wt%). These parameter optimizations modify the physical properties of the formulation, reducing oil transfer while maintaining sensorial acceptability and UV protection.
2Reliability
If high amounts of polar oils are used to solubilize UV-filters for high SPF and UVA protection, then UV protection efficacy is improved, but sensorial properties deteriorate
Solution Approach 1:
The micronized 1,4-di(benzoxazol-2'-yl)benzene particles serve as an intermediary that modifies the sensorial properties of the formulation. By incorporating these particles, the formulation achieves improved spreadability and reduced greasiness without reducing the concentration of polar oils needed for UV filter solubilization, thus maintaining sensorial acceptability alongside UV protection efficacy.
Solution Approach 2:
The patent creates a composite formulation system combining polar oils, UV filters, and micronized 1,4-di(benzoxazol-2'-yl)benzene particles. This composite approach allows the synergistic interaction between components to achieve both high UV protection and improved sensorial properties, transforming the formulation from a simple oil-based system to a multifunctional composite material.
3Object-generated harmful factors
If micronized 1,4-di(benzoxazol-2'-yl)benzene with particle size >300 nm is used, then material transfer reduction is achieved, but the effect is less pronounced compared to smaller particles
Solution Approach 1:
The patent applies parameter changes by precisely controlling the particle size of 1,4-di(benzoxazol-2'-yl)benzene within the range of 50-300 nm, with optimal performance at 100-200 nm. This parameter optimization maximizes the particle's ability to interact with polar oils and reduce material transfer, while the specification provides clear manufacturing guidance for achieving consistent particle size distribution.
Data Source
Figure 1
AI summary
The present invention relates to topical compositions comprising at least one polar oil and a micronized 1,4-di(benzoxazol-2'-yl)benzene having a mean particle size of at most 300 nm as well as to the use of such a micronized 1,4-di(benzoxazol-2'-yl)benzene to reduce the transfer of such oils to surfaces.