Creamy Water-in-Oil Emulsion Stabilized with Polyglyceryl Esters
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Solution Overview
Problem
Existing cosmetic compositions with high water content in a water-in-oil emulsion are unstable, leading to premature breakage and loss of texture during storage and use.
Innovation Solution
A cosmetic composition featuring a creamy water-in-oil emulsion stabilized with polyglyceryl esters, glutamic acid or its derivatives, and cosmetically acceptable glycols or diols, which allows for a fast, watery break during application while maintaining stability under various temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional emulsifier systems are used to retain water phase in oil phase, then the emulsion can maintain its structure, but the product becomes unstable and breaks prior to application, losing its thick and creamy texture
Solution Approach 1:
The patent changes the chemical parameters of the emulsifier system by using polyglyceryl esters (specifically polyglyceryl-3 diisostearate and polyglyceryl-3 oleate) instead of conventional emulsifiers. This parameter change in the emulsifier chemistry enables the emulsion to maintain stability while preserving the thick and creamy texture through application, resolving the contradiction between emulsion stability and texture consistency.
Solution Approach 2:
The patent employs a composite emulsifier system combining multiple polyglyceryl esters (polyglyceryl-3 diisostearate and polyglyceryl-3 oleate) working together. This composite approach creates a synergistic effect that enhances both the stability of the water-in-oil emulsion and the maintenance of creamy texture during application, overcoming the limitations of single emulsifier systems.
2Quantity of substance
If high water content is included in the water-in-oil emulsion to provide hydrating benefits, then the product offers better moisturizing properties, but the emulsion becomes unstable and susceptible to separation
Solution Approach 1:
The patent changes the emulsifier parameters by incorporating polyglyceryl esters that are specifically effective at stabilizing high water content formulations. This parameter change in the emulsifier chemistry allows the emulsion to maintain stability even with elevated water content, enabling both hydrating benefits and emulsion stability to coexist.
3Productivity
If the emulsion is formulated to break quickly during application to release water phase, then the product provides fast hydration, but the texture becomes thin and liquidous before application is complete
Solution Approach 1:
The patent changes the rheological parameters of the emulsion by using polyglyceryl ester emulsifiers that control the breakdown behavior. This parameter change enables the emulsion to maintain its thick and creamy texture throughout the application process while still providing effective hydration, resolving the contradiction between hydration speed and texture stability.
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 composition achieves a stable, creamy texture that remains intact during storage and use, with a rapid transition to a thin texture upon application, ensuring consumer satisfaction and environmental sustainability.
Implementation Method 1
A cosmetic composition featuring a creamy water-in-oil emulsion stabilized with polyglyceryl esters, glutamic acid or its derivatives, and cosmetically acceptable glycols or diols
Implementation Method 2
The composition provides a substantially thick creamy initial texture transitioning to a thin texture, wherein the creamy emulsion is stabilized and not susceptible to separation
Implementation Method 3
The composition provides a substantially thick creamy initial texture transitioning to a thin texture, wherein the creamy emulsion is stabilized and not susceptible to separation
Implementation Method 4
the creamy emulsion demonstrates breaking and release of the water phase upon rubbing application of the composition on a substrate
Data Source
AI summary
A cosmetic composition in the form of a creamy emulsion having an internal water phase in an oil phase includes at least one polyglyceryl ester, a glutamic acid, or a derivative thereof, at least one cosmetically acceptable glycol or diol, at least one oil, water, and optionally one or more additives. The composition excludes mineral and organic UV filters. The creamy emulsion demonstrates breaking and release of the water phase upon rubbing application of the composition on a substrate. The composition demonstrates stability at temperatures in a range from about 5° C. to about 45° C. for a period of eight weeks and under freeze-thaw conditions that range from about −20° C. to about 25° C., where the stability is evidenced by lack of separation of the water and oil phases and/or maintaining rheological characteristics over time in the absence of rubbing on a substrate.