Aqueous Hydrogenated Rapeseed Oil Wax Dispersions 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, linear fatty alcohols, glycerol monoesters, and amphoteric or zwitterionic surfactants, with optional additives, providing stable dispersions with small particle sizes and excellent pearlizing and conditioning effects, while avoiding ethylene oxide and sulfate groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If natural waxes like hydrogenated rapeseed oil are used to replace ethylene glycol distearate, then the product is more natural and environmentally friendly, but the storage stability and pearlizing effect deteriorate when exposed to varying temperatures
Solution Approach 1:
The patent uses composite materials by combining hydrogenated rapeseed oil (natural wax) with specific surfactants (amphoteric and/or zwitterionic surfactants, and nonionic surfactants without ethylene oxide) to create a stable aqueous dispersion. This composite approach allows the natural wax to maintain its natural labeling benefit while the surfactant combination provides the necessary storage stability and temperature resistance, resolving the contradiction between natural composition and reliability.
2Object-affected harmful factors
If natural waxes are used to replace ethylene glycol distearate, then the product is more natural, but the pearlizing effect deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the particle size of the hydrogenated rapeseed oil to a specific range (0.1 to 1.0 μm, preferably 0.1 to 0.2 μm) and adjusting the surfactant concentrations (amphoteric and/or zwitterionic surfactants: 10-25 wt%, nonionic surfactants: 0-5 wt%). These parameter optimizations enable the natural wax to achieve excellent pearlizing effects comparable to or better than conventional waxes, while maintaining natural labeling.
3Object-affected harmful factors
If natural waxes are used to replace ethylene glycol distearate, then the product is more natural, but the viscosity control deteriorates under temperature variations
Solution Approach 1:
The patent uses surfactants as intermediaries between the hydrogenated rapeseed oil and water. The amphoteric and/or zwitterionic surfactants (10-25 wt%) and nonionic surfactants (0-5 wt%) act as mediators that stabilize the dispersion and control viscosity across temperature variations. These intermediaries prevent wax crystallization and maintain flow properties, resolving the contradiction between natural composition and viscosity stability.
4Object-affected harmful factors
If natural waxes are used to replace ethylene glycol distearate, then the product is more natural, but the conditioning effect deteriorates
Solution Approach 1:
The patent applies local quality by using hydrogenated rapeseed oil with specific fatty acid composition (35-45 wt% C18 fatty acid, 40-50 wt% C22 fatty acid) to target specific conditioning needs. The optimized particle size (0.1 to 1.0 μm) ensures proper penetration and distribution on hair/skin surfaces, providing excellent conditioning effects with natural labeling while maintaining reliability.
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 maintain excellent pearlizing and conditioning effects, show stable viscosity, and ensure storage stability across temperature variations, enhancing user experience and product performance.
Implementation Method 1
aqueous cosmetic preparations containing wax particles... nonionic emulsifiers selected from the group consisting of linear fatty alcohol and glycerol mono esters
Implementation Method 2
amphoteric and/or zwitterionic surfactants... optional additional nonionic surfactants
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.