Diglycerin-Modified Silicone for Stable W/O Emulsions
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Solution Overview
Problem
Conventional glycerin-modified silicones face challenges in stabilizing water-in-oil emulsions, especially when the oil phase contains non-polar organic oils, and they are expensive and difficult to produce, limiting their use in cosmetic compositions due to oxidative degradation concerns and compatibility issues with polyether-modified silicones.
Innovation Solution
A diglycerin derivative-modified silicone with a specific molecular structure that allows for excellent emulsification and dispersion properties in various oil phases, including non-polar organic oils, without the need for polyether groups, enabling stable water-in-oil emulsions and cosmetic compositions without polyoxyethylene (PEG) structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional glycerin-modified silicones are used to stabilize water-in-oil emulsions, then emulsion stability is improved, but manufacturing cost increases and production difficulty increases
Solution Approach 1:
The patent changes the chemical structure parameters of the silicone by introducing diglycerin derivative groups with specific molecular weights and configurations. This structural modification enables the silicone to achieve excellent emulsification performance in water-in-oil systems without requiring complex production processes or expensive raw materials, thus resolving the contradiction between emulsion stability and ease of manufacture
Solution Approach 2:
The patent creates a composite structure by combining silicone backbone with diglycerin derivative groups. This composite material approach allows the molecule to exhibit both the chemical stability of silicone and the emulsification properties of glycerin derivatives, achieving stable water-in-oil emulsions through a relatively simple and cost-effective synthesis process
2Reliability
If polyether-modified silicones are used for emulsification, then emulsification performance is improved, but oxidative degradation occurs and compatibility issues arise
Solution Approach 1:
The patent extracts the polyether groups from the silicone structure that cause oxidative degradation, while retaining the emulsification functionality through diglycerin derivative groups. This extraction eliminates the harmful oxidative effects while preserving the beneficial emulsification performance, resolving the contradiction between reliability and harmful factors
Solution Approach 2:
The patent replaces the unstable polyether-modified silicones with diglycerin derivative-modified silicones that are more resistant to oxidation. Although the term 'disposable' typically refers to cost, in this context it implies using a material that may have shorter functional lifetime but avoids accumulation of degradation products, thus improving long-term reliability by eliminating oxidative degradation
3Stability of the object's composition
If wax is used to solidify oil phase for W/O emulsion stabilization, then emulsion stability is improved, but usability and sensation during use deteriorate
Solution Approach 1:
The patent changes the physical state parameters of the oil phase by using diglycerin derivative-modified silicones that provide stabilization without requiring solidification. The modified silicone molecules interact with the oil phase to create stable emulsions while maintaining a liquid or semi-liquid state, thus improving usability and sensation during use while preserving emulsion stability
Solution Approach 2:
The diglycerin derivative-modified silicone acts as an intermediary substance between the oil phase and aqueous phase. Instead of solidifying the oil phase with wax, this intermediary emulsifier facilitates stable emulsion formation through its amphiphilic structure, maintaining good usability and sensation while achieving the desired emulsion stability
4Stability of the object's composition
If conventional emulsifiers are used to maintain W/O emulsion stability, then stability is improved, but emulsion viscosity increases
Solution Approach 1:
The patent changes the molecular parameters of the emulsifier by using diglycerin derivative-modified silicones with specific chain lengths and branching structures. These structural parameters allow the emulsifier to provide stable emulsification at lower concentrations, thus maintaining W/O emulsion stability while keeping emulsion viscosity low and avoiding excessive thickening
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 diglycerin derivative-modified silicone provides stable emulsification and dispersion in a wide range of oil systems, improving cosmetic composition stability and feel, while avoiding oxidative degradation and compatibility issues, thus enabling a PEG-FREE formulation with enhanced environmental suitability.
Implementation Method 1
an emulsifier for a water-in-oil emulsion... particularly excellent emulsification and dispersion stabilities in an oil phase
Implementation Method 2
a surfactant and dispersing agent containing these... excellent emulsification and dispersion stabilities in an oil phase
Data Source
AI summary
A diglycerin derivative-modified silicone, wherein the diglycerin derivative-modified silicone contains a long chain alkyl group as a lipophilic group in a molecule, does not have an oxyalkylene structure wherein an average value of the number of repetitions of the oxyalkylene unit is two or more, has only a glycerin derivative group with an average value of the number of repetitions of glycerin units of 1.1 to 2.9 as a hydrophilic group, and does not have other hydrophilic group in the molecule; a surfactant and dispersing agent, an emulsifier for a water-in-oil emulsion, an external use preparation, and a cosmetic composition containing the same.