UV Stabilizing Composition for Soluble Broad-Spectrum Protection
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Solution Overview
Problem
Current UV stabilizers for body care and household products face challenges such as limited solubility, photo-instability, and interaction with other UV filters, failing to provide comprehensive protection against UV-A and UV-B radiation and oxygen, which leads to degradation of photosensitive ingredients like colorants, dyes, and fragrances.
Innovation Solution
A composition comprising at least 10 wt.% 4,4′-Methoxy-tert.butyldibenzoylmethane, 50 wt.% 2-Cyano-3,3-diphenylacrylate, and 15 wt.% Homomethylsalicylate, optionally with an oil-soluble antioxidant, offering excellent UV-A and UV-B filter activity, solubility, and stability, allowing easy incorporation into various products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If benzophenone or benzotriazole derivatives are used as UV-light absorbers, then UV-B protection is improved, but solubility is limited and re-crystallization occurs in the final product
Solution Approach 1:
The patent combines multiple UV filter compounds with different absorption characteristics into a single composition. This merging approach allows the formulation to achieve both UV-A and UV-B protection while maintaining solubility through synergistic interactions between the components, preventing re-crystallization issues that occur with single compounds.
Solution Approach 2:
The invention uses a composite formulation containing multiple UV filter types (benzophenone derivatives for UV-B, and additional compounds for UV-A protection). This composite material approach enables comprehensive spectral coverage while the combined composition maintains improved solubility and stability compared to individual compounds.
2Object-affected harmful factors
If 4,4′-Methoxy-tert.butyldibenzoylmethane is used as stabilizer, then UV-A protection is improved, but photo-stability is limited and decomposition occurs upon irradiation
Solution Approach 1:
The patent introduces additional UV filter compounds as intermediary substances that work synergistically with 4,4′-Methoxy-tert.butyldibenzoylmethane. These intermediary compounds enhance the overall photo-stability of the formulation while maintaining UV-A protection, preventing the decomposition that occurs when avobenzone is used alone.
Solution Approach 2:
The invention formulates a composite material where 4,4′-Methoxy-tert.butyldibenzoylmethane is combined with other UV filters. This composite approach maintains the excellent UV-A protection capabilities of avobenzone while the additional components provide stabilizing effects that prevent decomposition upon irradiation.
3Shape
If transparent or slightly colored packaging is used to display product appearance, then aesthetic appearance is improved, but UV irradiation exposure increases leading to decomposition
Solution Approach 1:
The patent applies preliminary anti-action by incorporating a comprehensive UV protection system into the product formulation itself. This internal protection mechanism counteracts the harmful UV effects that would otherwise penetrate through transparent packaging, allowing the packaging to remain aesthetic while the formulation provides preemptive defense against UV-induced decomposition.
Solution Approach 2:
The invention converts the potential harm of UV exposure through transparent packaging into a benefit by using the UV filters to activate protective mechanisms. The formulation absorbs and dissipates UV energy, transforming what would be harmful radiation into a controlled process that actually enhances product stability while maintaining packaging aesthetics.
4Object-affected harmful factors
If complex mixtures of UV-filters, hindered nitroxyl and hydroxylamine compounds are used for stabilization, then protection capability is improved, but device complexity and formulation complexity increase
Solution Approach 1:
The patent achieves multi-functionality by designing a UV filter composition that simultaneously provides UV-A protection, UV-B protection, and oxidation protection through synergistic component interactions. This universal formulation approach consolidates multiple protective functions into a single integrated system, reducing the need for separate complex mixtures of different stabilizer types.
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 effectively stabilizes photosensitive ingredients against UV radiation and oxygen, maintaining product appearance and performance by preventing unwanted color changes and off-odors, while being compatible with cosmetic bases and packaging materials.
Implementation Method 1
UV-light absorber such as benzophenone or benzotriazole derivatives are used to enhance the products stability and shelf life due to their absorption properties
Implementation Method 2
complex mixtures of UV-filters, hindered nitroxyl and hydroxylamine compounds are described for the stabilization
Data Source
AI summary
The present invention relates to compositions of UV absorbers and optionally additional antioxidants. The compositions are useful for the protection and stabilization of photosensitive ingredients such as colorants, dyes, scents, fragrances and active ingredients in body care products, household products or inks against the deleterious effects of ultraviolet radiation and oxygen.