Triazine Sunscreen Composition with Non-Ionic Surfactant
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Solution Overview
Problem
Current sunscreen compositions fail to provide stable high SPF protection over a sustained period using triazine compounds without additional UV-A or UV-B sunscreens, especially in fatty acid-containing oil-in-water emulsions, and often require high amounts of sunscreen agents, increasing costs.
Innovation Solution
A sunscreen composition comprising 0.05 to 15% of a triazine compound, 0.01 to 10% non-ionic surfactants with high HLB values, and a cosmetically acceptable base with 6 to 25% fatty acids, which includes additional UV-A or UV-B sunscreens, solubilizers, and photostabilizers to achieve high SPF values with reduced total organic sunscreen content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amounts of UV-A and UV-B sunscreen agents are used to achieve high SPF, then sun protection factor is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the chemical parameters by using triazine compounds (specifically compounds of formula I with particular R1-R6 group configurations) instead of conventional sunscreen agents. This parameter change allows achieving high SPF with lower quantities of active ingredients
Solution Approach 2:
The invention creates a composite sunscreen system combining triazine compounds with specific non-ionic surfactants (having HLB 10-20) and fatty acids (C12-C22) in defined ratios. This composite formulation enhances the photoprotective efficiency per unit of active ingredient
2Quantity of substance
If triazine compounds are used without additional UV-A or UV-B sunscreens, then cost is reduced, but photostability and sustained protection are compromised
Solution Approach 1:
The patent introduces non-ionic surfactants as intermediary substances that mediate between the triazine compound and the aqueous environment. These surfactants (with HLB 10-20) stabilize the triazine compound formulation, preventing degradation and ensuring sustained photoprotection without requiring additional UV filters
Solution Approach 2:
The invention optimizes the concentration parameters of triazine compounds (0.1-10% w/w) and combines them with specific fatty acid chains (C12-C22) to achieve the desired photostability profile, allowing reduced total sunscreen content while maintaining protection
3Reliability
If non-ionic surfactant is included in cosmetic base with fatty acids, then high SPF is achieved, but formulation complexity increases
Solution Approach 1:
The non-ionic surfactants in the patent perform multiple functions simultaneously: they act as emulsifiers for the fatty acid base, photostabilizers for the triazine compound, and SPF-enhancing agents. This multi-functionality reduces the need for separate additives, simplifying the overall formulation despite the high SPF achievement
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 SPF values higher than 20, with enhanced stability and reduced costs by utilizing low amounts of sunscreen agents, providing effective protection against UV-A and UV-B radiation while maintaining cosmetic properties.
Implementation Method 1
a non-ionic surfactant; selected from the group consisting of (a) fatty alcohol ethoxylates with saturated carbon chain and having HLB higher than 15.5; or (b) alkyl phenol ethoxylates having HLB higher than 15
Implementation Method 2
Solar radiation includes ultraviolet (UV) radiation, wavelength of which is between 200 nm and 400 nm. Exposure of skin to UV-A (320 to 400 nm) and UV-B (290 to 320 nm) causes various problems
Data Source
AI summary
The invention relates to a photostable sunscreen composition that not only provides enhanced sun protection by way of high SPF, but does that over sustained period of time after applying the composition on the skin. The present inventors have found that when a compound of the triazine group is used without additional UVA or UVB sunscreen, and a non-ionic surfactant is included in a cosmetic base comprising fatty acids, it is possible to achieve high SPF.