Hydrogenated Rapeseed Oil Wax Dispersion for Stable Pearlizing
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Solution Overview
Problem
Existing wax dispersions containing ethylene glycol distearate (EDGS) are being replaced by natural waxes in personal care products, but achieving equivalent performance in terms of pearlizing effect, viscosity, storage stability, and conditioning properties is challenging, especially when exposed to varying temperatures.
Innovation Solution
Aqueous wax dispersions composed of hydrogenated rape seed oil, nonionic emulsifiers, and amphoteric or zwitterionic surfactants, with optional additives, providing excellent pearlizing and conditioning effects while maintaining stable viscosity and storage stability across temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional wax emulsions are used, then application is simple, but they contain high proportions of volatile organic compounds (VOCs) which is harmful to the environment and human health
Solution Approach 1:
The patent changes the physical-chemical parameters of the system by replacing conventional organic emulsifiers with cationic polymers that have specific molecular weights and charge densities. This parameter change allows the formation of stable wax dispersions in water without relying on VOC-based emulsifiers, thereby reducing harmful factors while maintaining ease of manufacture.
Solution Approach 2:
The invention uses composite material systems consisting of cationic polymers combined with anionic or nonionic surfactants. This composite approach creates a synergistic effect where the polymer provides structural stability and the surfactant provides interfacial activity, achieving both low VOC content and high emulsion stability simultaneously.
2Stability of the object's composition
If conventional emulsifiers are used to stabilize wax emulsions, then emulsion stability is achieved, but the proportion of bound water is high leading to poor adhesion and flaking
Solution Approach 1:
The patent optimizes the molecular weight and charge density parameters of the cationic polymer to achieve stable wax dispersion with minimal bound water. By carefully selecting polymers with specific parameters (molecular weight 10^5-10^7, charge density 0.5-2.0 mmol/g), the system achieves stability through electrostatic and steric mechanisms rather than water binding, thus improving adhesion and preventing flaking.
3Object-generated harmful factors
If high proportions of bound water are present in the emulsion, then emulsion stability is maintained, but adhesion to substrates deteriorates causing flaking
Solution Approach 1:
The cationic polymer acts as an intermediary between the hydrophobic wax particles and the hydrophilic water phase. Instead of relying on bound water for stability, the polymer mediates the interaction through electrostatic attraction and steric hindrance, creating a stable interface that does not generate flaking when applied to substrates.
Solution Approach 2:
The invention changes the stabilization mechanism from water-binding to electrostatic/steric stabilization by selecting polymers with optimal charge density and molecular weight parameters. This parameter optimization ensures that stability is achieved without excessive bound water, thereby preventing flaking while maintaining emulsion integrity.
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 dispersions exhibit improved wet and dry combability, reduced hair breakage, and enhanced skin feel, with stable pearlizing effects and viscosity, even under temperature swings, without using ethylene oxide or sulfate-containing components.
Implementation Method 1
The invention relates to stable, charged wax particles in the form of dispersions in water stabilised by cationic polymers
Implementation Method 2
stable, charged wax particles in the form of dispersions in water stabilised by cationic polymers
Data Source
AI summary
This invention relates to aqueous wax dispersions comprising hydrogenated rape seed oil, the method of their preparation and their use as pearlizer and/or conditioner in personal care formulations, especially for the treatment of hair and/or body.