Triazine UV Filter Combination for Stable High SPF Cosmetics
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Solution Overview
Problem
Existing cosmetic preparations with inorganic micropigments like titanium dioxide and zinc oxide face challenges in stability and sensory properties, particularly at higher concentrations, leading to pigment agglomerates, storage instability, and unpleasant skin feel, while also causing yellow discoloration and failing to provide balanced UV protection.
Innovation Solution
A cosmetic preparation using 2,4,6-tris-(biphenyl)-1,3,5-triazine as a light protection filter in combination with phenylbenzimidazole sulfonic acid and other UV filters, without zinc oxide or titanium dioxide, to achieve high SPF and balanced UV protection with improved stability and sensory properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic micropigments (titanium dioxide, zinc oxide) are used at higher concentrations to achieve high SPF and UVA protection, then sun protection factor is improved, but storage stability deteriorates due to pigment agglomerates and precipitation
Solution Approach 1:
The patent removes inorganic micropigments (titanium dioxide and zinc oxide) from the formulation entirely, replacing them with organic UV filters. This extraction eliminates the agglomeration and precipitation problems that occur at high concentrations of inorganic pigments, while maintaining high SPF and UVA protection through the organic filter combination.
Solution Approach 2:
The patent changes the chemical nature of the UV filters from inorganic micropigments to organic compounds (specifically 2,4,6-tris-(biphenyl)-1,3,5-triazine in combination with phenylbenzimidazole sulfonic acid). This parameter change allows achieving high sun protection without the stability issues of inorganic pigments at high concentrations.
2Reliability
If inorganic micropigments are used at higher concentrations to achieve high SPF and UVA protection, then sun protection factor is improved, but sensory properties deteriorate due to unpleasant skin feel
Solution Approach 1:
The patent extracts removes inorganic micropigments that cause unpleasant skin feel at high concentrations, replacing them with organic UV filters that provide equivalent or superior protection with better sensory properties.
3Reliability
If certain UV filters (2-(4'-Diethylamino-2'-hydroxybenzoyl)-benzoic acid hexyl esters) are used in larger quantities to achieve high SPF, then sun protection factor is improved, but yellow discoloration increases
Solution Approach 1:
The patent removes the yellowing-prone UV filter (2-(4'-Diethylamino-2'-hydroxybenzoyl)-benzoic acid hexyl ester) from the formulation and replaces it with 2,4,6-tris-(biphenyl)-1,3,5-triazine in combination with phenylbenzimidazole sulfonic acid, which provides equivalent sun protection without significant yellow discoloration.
Solution Approach 2:
The patent uses a composite filter system combining 2,4,6-tris-(biphenyl)-1,3,5-triazine with phenylbenzimidazole sulfonic acid. This combination provides broad-spectrum UV protection while minimizing yellow discoloration, achieving a balance between SPF and aesthetic appearance.
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 solution results in an over-additive increase in SPF, providing higher sun protection factor without the drawbacks of traditional inorganic filters, such as stability issues and unpleasant skin feel, while minimizing yellow discoloration and incorporating fewer inorganic metal oxide pigments.
Implementation Method 1
2,4,6-tris-(biphenyl)-1,3,5-triazine in combination with phenylbenzimidazole sulfonic acid as light protection filters
Implementation Method 2
The UV protection effect of micropigments is based on the physical effects of reflection and light scattering
Implementation Method 3
The UV protection effect of micropigments is based on the physical effects of reflection and light scattering
Data Source
AI summary
The invention relates to a cosmetic preparation which contains a combination of a) 2,4,6-tris-(biphenyl)-,3,5-triazine, b) phenylbenzimidazole sulfonic acid and/or the salts thereof, c) 2-(4'-diethylamino-2'-hydoxybenzoyl)-benzoic acid hexyl ester.