W/O/W Emulsion Stabilization Without Silicone Residues
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Solution Overview
Problem
Existing skin protection products, particularly multiple emulsions like W/O/W, face challenges in maintaining stability over long storage periods and providing effective protection against water and aqueous skin irritants without leaving residues on materials, which limits their use in industries like automotive and rubber processing.
Innovation Solution
Formulating W/O/W emulsions with specific combinations of aliphatic diols, single-value aliphatic alcohols, and emulsifiers such as polyolpoly-12-hydroxy stearates, which enhance stability and multiplicity, while avoiding silicone residues that can contaminate workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone compounds are used in skin protection products to provide excellent barrier protection and stability, then protective effect and skin compatibility are improved, but residues are left on work pieces that are difficult to remove and detrimental to further processing
Solution Approach 1:
The patent removes silicone compounds from the skin protection product formulation entirely, extracting the harmful residue-causing component while retaining the essential barrier protection function through alternative ingredients such as emulsifiers and surfactants that do not leave difficult-to-remove residues on work pieces
Solution Approach 2:
The patent employs formulations that provide temporary protection without persistent residues, allowing work pieces to be processed subsequently without the need for extensive cleaning to remove durable silicone layers
2Reliability
If multiple emulsions are formulated to provide protection against water and aqueous irritants, then protective barrier function is improved, but stability over long storage periods deteriorates
Solution Approach 1:
The patent optimizes the composition parameters of the multiple emulsion, specifically adjusting the ratios and types of emulsifiers, surfactants, and other formulation components to achieve a balance that maintains both the protective barrier function and long-term storage stability of the emulsion structure
Solution Approach 2:
The patent uses composite emulsion systems combining multiple emulsifiers and surfactants with different HLB values and molecular structures, creating a synergistic formulation that enhances both the protective performance against aqueous irritants and the structural stability during storage
3Reliability
If W/O/W emulsions are used to create protective layers on skin, then protection against aqueous noxa is improved, but the emulsions leave residues on materials and work pieces
Solution Approach 1:
The patent removes silicone-based components from the W/O/W emulsion formulation that are responsible for residue formation on materials and work pieces, while maintaining the protective barrier function through alternative emulsifier and surfactant systems that are easier to remove or do not interfere with subsequent processing
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 proposed formulation achieves high stability and multiplicity of W/O/W emulsions, providing effective protection against aqueous noxa without leaving residues, thus enabling their use in industries with aqueous skin exposure and offering cosmetic acceptance comparable to light skin care creams.
Implementation Method 1
stabilised multiple emulsions... W/O/W emulsions... excellent multiplicity as well as particularly good stability of the W/O/W emulsion
Implementation Method 2
emulsifier mixture... in combination with an alkyl and/or alkylene glucoside and a fat alcohol and/or partial glycerides
Implementation Method 3
protection against water and aqueous skin irritants... effective protection against aqueous noxa... hydrophobic and harmless for the skin
Data Source
AI summary
The invention relates to stabilised multiple emulsions comprising the compounds a), b) and c), methods for the stabilisation of multiple emulsions and the use of multiple emulsions as skin protection products, in particular for protection against aqueous noxa, where: a) at least one aliphatic unbranched diol with 2 to 4 carbon atoms in the hydrocarbon chain, b) at least one further branched or unbranched aliphatic diol with 4 to 12 carbon atoms in the hydrocarbon chain that is different from a), whereby the hydrocarbon chain may be interrupted by an oxygen atom, c) at least one single-value aliphatic alcohol with 12 to 30 carbon atoms in the hydrocarbon chain.