Solid Lipid Nanoparticle Cineole Dispersion
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Solution Overview
Problem
The direct cosmetic or topical application of 1,8-cineole is challenging due to its irritating and sensitizing effects, especially at high concentrations, which limits its effective use in cosmetic formulations.
Innovation Solution
Encapsulation of 1,8-cineole using a modified carrier system based on solid lipid nanoparticles (SLNs) with a lipid matrix having a melting temperature around body temperature, allowing for delayed release of the active ingredient, reducing skin irritation and sensitization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If direct cosmetic or topical application of 1,8-cineole is used, then effective concentrations can be applied, but skin irritation and sensitization occur
Solution Approach 1:
The patent uses solid lipid nanoparticles as an intermediary carrier system to transport 1,8-cineole into the skin. The SLNs act as a mediator that delivers the active ingredient to deeper skin layers while preventing direct contact between cineole and the skin surface, thereby reducing irritation and sensitization effects.
Solution Approach 2:
The patent utilizes phase transition of the lipid matrix at body temperature (37-39°C) to control the release of 1,8-cineole. The solid lipid nanoparticles melt at body temperature, releasing the encapsulated cineole in a controlled manner, which prevents premature release and reduces skin irritation while maintaining effective concentrations.
2Reliability
If high concentrations of 1,8-cineole are applied, then anti-aging and antioxidant effects are enhanced, but skin irritation increases
Solution Approach 1:
The solid lipid nanoparticles serve as an intermediary delivery system that enables the application of high concentrations of 1,8-cineole (5-20 wt.%) while preventing direct skin contact. The nanoparticles transport the high concentration of cineole to deeper skin layers, maintaining anti-aging and antioxidant effects without the associated irritation.
Solution Approach 2:
The controlled phase transition of the lipid matrix at body temperature ensures that high concentrations of cineole are released only when needed, preventing premature irritation while maintaining effective levels for anti-aging benefits throughout the wear period.
3Quantity of substance
If traditional carrier systems like emulsions or liposomes are used, then 1,8-cineole can be delivered, but the carrier system complexity increases
Solution Approach 1:
The patent changes the physical state parameter of the carrier system from liquid-based (emulsions, liposomes) to solid-based (solid lipid nanoparticles). This parameter change simplifies the carrier system formulation and stability while maintaining effective delivery of 1,8-cineole, as solid lipids provide inherent structural stability without requiring complex stabilization mechanisms.
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 delayed release of 1,8-cineole at body temperature prevents skin irritation and odor nuisance, while effectively transporting the active ingredient into deeper skin layers for anti-aging, antioxidant, and anti-inflammatory benefits, even at high concentrations.
Implementation Method 1
the mixture of lipids has a melting temperature in the range between 35 - 40°C, preferably in the range between 37 - 39°C
Implementation Method 2
The average particle diameter of SLNs ranges from 40 to 1000 nm... stabilized in aqueous media by 0.5–5% (w/w) of emulsifier
Data Source
AI summary
The invention relates to an aqueous dispersion for cosmetic application comprising dispersed primary particles with a particle size of 10 to 1000 nm, wherein the primary particles comprise a lipid matrix based on lipids that are solid at 20°C and contain at least one active ingredient. In order to cosmetically apply effect-relevant concentrations of cineole as an active ingredient while largely avoiding irritating and sensitizing effects, encapsulation of cineole using a modified carrier system based on solid lipid nanoparticles (SLNs) with delayed release of the active ingredient cineole is proposed. Furthermore, the invention relates to a preparation for topical application to the skin of a human body.