Pongamol-Stabilized Sunscreen Composition
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Solution Overview
Problem
Current sunscreen compositions using synthetic photostabilizers are unsafe, environmentally hazardous, and costly, with UV filters like avobenzone and octyl-methoxycinnamate undergoing rapid photo-degradation, necessitating the need for natural, safe, and cost-effective alternatives.
Innovation Solution
A photostable sunscreen composition is developed using dibenzoylmethane derivatives like avobenzone and octyl-methoxycinnamate, stabilized with pongamol, along with additional UV filters such as Tinosorb M, ethyl hexyl triazone, octyl dimethyl PABA, TiO2, and ZnO, in judiciously selected weight percentages, leveraging pongamol's natural stabilizing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic photostabilizers are used in sunscreen compositions, then photostability is improved, but safety and environmental compatibility deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by replacing synthetic photostabilizers with natural alternatives. Specifically, it uses plant extracts containing flavonoids, phenolic compounds, and other natural antioxidants as photostabilizers, thereby maintaining photostability while eliminating safety and environmental concerns associated with synthetic chemicals.
Solution Approach 2:
The patent employs naturally occurring, readily available plant extracts as photostabilizers instead of expensive synthetic compounds. These natural ingredients are derived from common plants and can be sustainably sourced, making the formulation both cost-effective and environmentally friendly while providing adequate photostability.
2Quantity of substance
If UV filters like avobenzone and octyl-methoxycinnamate are used, then UV absorption is improved, but photo-degradation rate increases
Solution Approach 1:
The patent introduces natural photostabilizers as intermediary substances that protect the UV filters from degrading. These stabilizers, derived from plant extracts, act as mediators that absorb excess energy and prevent photo-degradation of avobenzone and octyl-methoxycinnamate, thereby extending their protective action duration.
Solution Approach 2:
The patent creates a composite sunscreen formulation that combines UV filters (avobenzone, octyl-methoxycinnamate) with natural photostabilizers (plant extracts containing flavonoids, phenolics). This composite approach allows the UV filters to provide strong UV absorption while the natural stabilizers prevent their degradation, achieving both high UV protection and extended duration.
3Object-affected harmful factors
If natural photostabilizers are used, then safety and environmental compatibility are improved, but photostability enhancement is reduced
Solution Approach 1:
The patent combines multiple natural photoprotective components in a synergistic formulation. It merges UV filters (avobenzone, octyl-methoxycinnamate, Tinosorb M) with natural photostabilizers (plant extracts rich in flavonoids, phenolic compounds, and antioxidants). This combination creates a synergistic effect where the natural components collectively provide photostability enhancement comparable to or exceeding synthetic alternatives, while maintaining superior safety and environmental compatibility.
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 provides enhanced UV absorption efficiency and photostability, maintaining protection for a longer duration while being safe, environmentally friendly, and cost-effective, with pongamol's low required concentration and ease of extraction from karaja seed oil.
Implementation Method 1
UV filters used in the sunscreen preparations are mainly derivatives of 3-benzylidenecamphor, ethylhexyl salicylate, p-methoxy-cinnamic acid esters such as 2-ethylhexyl p-methoxycinnamate or octyl-methodycinnamate... Some of the UV absorbing organic compounds employed in sunscreen compositions, avobenzone in particular, undergo rapid photo degradation on exposure to UV radiation
Implementation Method 2
To overcome this problem, sunscreen preparations generally contain photostabilizers to enhance their photostability... We have found out by extensive research and experimentation that photostable sunscreen composition for topical application comprising UV absorbers dibenzoylmethane derivative such as avobenzone, octyl-methoxycinnamate and pongamol
Implementation Method 3
additional UV absorbers consisting of methylene bis- benzotriazolyl tetramethylbutylphenol (Tinosorb M), ethyl hexyl triazone, octyl dimethyl PABA (para-aminobenzoic acid), TiO2 and ZnO
Data Source
AI summary
The sunscreen composition includes dibenzoylmethane derivative in 1 to 5% by weight of the composition, octyl-methoxycinnamate in 1 to 10% by weight of the composition and dermatologically acceptable excipients in 79 to 97% by weight of the composition containing 60 - 75% aqueous phase stabilised with 1-(4-methoxy-5-benzofuranyl)-3 -phenyl 1, 3 propanedione (pongamol) in 0.9 to 6% by weight of the composition.