Cold-Processing Aloe Vera Emulsion Without Parabens
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Solution Overview
Problem
Current cosmetic compositions, particularly oil-in-water emulsions, face challenges in incorporating Aloe Barbadensis Leaf Juice due to its different pH, surface tension, and amino acid content, which affects stability and viscosity, and the use of parabens has been scrutinized, making it difficult to formulate stable, paraben-free systems.
Innovation Solution
A cosmetic composition is developed using a cold-processing method that forms a stable oil-in-water emulsion with Aloe Vera as the hydrating active ingredient, combined with gelling agents like carbomer and thickeners such as sodium acrylate/sodium acryloyldimethyl taurate copolymer, without the need for emulsifiers, surfactants, or parabens, maintaining a temperature below 30°C to preserve the amino acids and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Aloe Barbadensis Leaf Juice is incorporated into O/W emulsion, then hydrating properties and healing benefits are improved, but emulsion stability and viscosity control deteriorate due to different pH, surface tension, and amino acid content
Solution Approach 1:
The patent changes the pH parameter of the continuous phase by adding alkaline substances (sodium hydroxide, potassium hydroxide, or ammonium hydroxide) to match the pH of Aloe Barbadensis Leaf Juice (approximately 4). This parameter adjustment resolves the incompatibility between the aloe vera components and the emulsion system, maintaining both healing properties and emulsion stability.
Solution Approach 2:
The patent introduces intermediary substances (alkaline agents) that mediate between the acidic aloe vera components and the emulsion system. These intermediaries adjust the pH environment to be compatible with both the hydrating active ingredient and the emulsion structure, preventing separation while preserving amino acid integrity.
2Stability of the object's composition
If heated emulsifiers and surfactants are used to suspend Aloe Vera juice, then suspension stability is improved, but amino acid integrity deteriorates due to heat destruction
Solution Approach 1:
The patent performs preliminary pH adjustment of the continuous phase before incorporating the Aloe Barbadensis Leaf Juice. By pre-adjusting the pH to match the aloe vera components, the system creates a compatible environment that allows for gentle mixing at lower temperatures, preventing amino acid destruction while achieving stable suspension.
Solution Approach 2:
The patent replaces the thermal-mechanical system (heated emulsifiers and surfactants) with a chemical-system approach (pH-adjusted emulsifiers and surfactants). This substitution allows suspension stability to be achieved through chemical compatibility rather than thermal energy, preserving the amino acids while maintaining emulsion integrity.
3Object-affected harmful factors
If paraben-free preservative systems are used, then consumer safety and product acceptability are improved, but emulsion stability and viscosity decrease
Solution Approach 1:
The patent employs emulsifiers and surfactants that perform multiple functions: they provide emulsion stability, maintain viscosity, and offer preservative properties without requiring parabens. This multi-functionality allows the system to achieve both safety (paraben-free) and stability (emulsion integrity) simultaneously.
Solution Approach 2:
The patent uses composite preservative systems combining multiple gentle preservatives (such as phenoxyethanol, ethylhexylglycerin, and benzoic acid) that work synergistically to provide effective preservation without the need for parabens. This composite approach maintains emulsion stability while meeting consumer safety requirements.
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 method results in a stable cream with improved viscosity and hydration properties, providing a fresher, less greasy feel on the skin without the use of heat, preservatives, or surfactants, thus overcoming the challenges of incorporating Aloe Vera and maintaining product stability.
Implementation Method 1
The at least one gelling agent is at a concentration, by weight, of about 0.01% to about 5%, based upon weight of the composition. The at least one thickener is at a concentration, by weight of about 0.1% to about 5%, based upon weight of the composition.
Implementation Method 2
During the method of preparing the cosmetic composition, the temperature of the composition during mixing and homogenizing does not exceed about 30° C.
Implementation Method 3
The cosmetic composition includes an aqueous-dispersing-continuous phase and an oily-dispersed-discontinuous phase
Data Source
AI summary
A cosmetic composition in the form of an emulsion and a cold-processing method for preparing the cosmetic composition are provided. The cosmetic composition includes a hydrating active ingredient, at least one gelling agent, and at least one thickener. The hydrating active ingredient is present at a concentration, by weight, of about 0.1% to about 90%, based upon weight of the composition. The at least one gelling agent is present at a concentration, by weight, of about 0.01% to about 5%, based upon weight of the composition. The at least one thickener is present at a concentration, by weight of about 0.1% to about 5%, based upon weight of the composition.