Aqueous Lipophilic Formulation Stability Using Microcrystalline Cellulose and Clay
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Solution Overview
Problem
Existing aqueous formulations with high concentrations of lipophilic compositions, such as essential oils, face stability issues over time due to immiscibility with water, leading to phase separation and skin reactions, particularly when using synthetic emulsifiers, which can impair their cosmetic and pharmaceutical efficacy.
Innovation Solution
An aqueous formulation comprising between 0.1% and 50% by weight of lipophilic composition, with a homogenizing component of 0.1% to 10% microcrystalline cellulose and 0.01% to 2% clay, along with other optional ingredients, to enhance stability and ease of application, particularly using a combination of microcrystalline cellulose and bentonite in specific proportions to prevent phase separation and facilitate atomization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If synthetic emulsifying agents are used to stabilize the water-lipophilic composition mixture, then stability is improved, but skin reactions and perfuming properties deteriorate
Solution Approach 1:
The patent introduces an intermediary substance (natural emulsifier derived from plant extracts) that mediates between water and lipophilic composition, enabling stable mixing without synthetic emulsifiers that cause skin reactions. This natural emulsifier acts as a bridge that reduces interfacial tension between immiscible phases while being biocompatible.
Solution Approach 2:
The patent changes the chemical parameters of the emulsifying agent by using natural plant-derived compounds instead of synthetic ones. This parameter change maintains the emulsification function while eliminating harmful effects on skin and preserving perfuming properties of the lipophilic composition.
2Stability of the object's composition
If cellulose nanocrystals are added to improve stability of high concentration oil formulations, then stability is improved, but device complexity increases
Solution Approach 1:
The patent extracts and uses only the essential stabilizing component from complex cellulose structures, utilizing naturally occurring cellulose derivatives that provide stability without requiring nanocrystal extraction processes. This simplifies the formulation while maintaining stability benefits.
3Stability of the object's composition
If bentonite and cellulose derivative are added to thicken the formulation, then viscosity is improved, but ease of application deteriorates
Solution Approach 1:
The patent optimizes the concentration parameters of thickening agents (bentonite and cellulose derivative) to achieve a balanced viscosity that provides stability without excessive thickness. By carefully controlling the quantity of these additives, the formulation maintains pumpability and atomization capability while still providing adequate stability.
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 formulation achieves improved homogeneity and stability over time, allowing for effective distribution and application of the lipophilic composition, reducing skin reactions and maintaining the desired cosmetic or pharmaceutical properties, as demonstrated by successful phase-separation and dispensing tests.
Implementation Method 1
between 0.1% and 10% by weight of homogenising component comprising at least microcrystalline cellulose
Implementation Method 2
between 0.01% and 2% by weight of clay
Data Source
AI summary
An aqueous formulation comprising between 0.1% and 50% by weight of lipophilic composition, said formulation further comprising between 0.1% and 10% by weight of homogenising component comprising at least microcrystalline cellulose; between 0.01% and 2% by weight of clay; and the remainder in water.