Silicone Elastomer Gel Stabilizes Non-Hydrocarbon Emollient
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Solution Overview
Problem
Cosmetic compositions with high amounts of emollients often become unstable upon exposure to high temperatures, leading to phase separation, which is a challenge for maintaining product stability and sensorial properties.
Innovation Solution
A cosmetic composition comprising 1 to 30 wt% of a non-hydrocarbon emollient and 2 to 60 wt% of a blend of silicone elastomer gel and solvent, where the silicone elastomer gel is cross-linked and modified with alkyl and phenyl groups, stabilizing the emollient and preventing phase separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the amount of emollient is increased beyond the normal range, then the skin moisturization effect is improved, but the formulation stability deteriorates and phase separation occurs upon exposure to high temperature
Solution Approach 1:
A silicone elastomer is introduced as an intermediary substance between the emollient and the continuous phase. The elastomer acts as a stabilizing agent that prevents phase separation of the emollient at high temperatures while allowing increased emollient content for improved moisturization效果
Solution Approach 2:
The formulation uses a composite system combining emollient, silicone elastomer, and continuous phase. This composite structure leverages the unique properties of each component to achieve both high emollient content and formulation stability, with the elastomer providing structural integrity
2Quantity of substance
If the amount of emollient is increased, then the skin care effect is improved, but the formulation develops evident signs of phase separation
Solution Approach 1:
The silicone elastomer serves as a mediator that maintains the homogeneity of the formulation even with high emollient content. It prevents the emollient from separating into distinct phases, ensuring reliable product performance throughout its shelf life
3Adaptability or versatility
If non-hydrocarbon emollient is used, then the skin compatibility is improved, but the compatibility with silicone elastomer deteriorates leading to instability
Solution Approach 1:
The invention changes the chemical parameters of the silicone elastomer by introducing specific side chains (alkyl, aryl, or alkaryl groups with specified carbon atom ranges). This parameter modification enables the elastomer to be compatible with non-hydrocarbon emollients while maintaining formulation 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 remains stable over a prolonged period, allowing for increased emollient content without phase separation, enhancing skin moisturization and sensorial properties.
Implementation Method 1
silicone elastomer gel of Formula (I) wherein the silicone elastomer gel is cross-linked
Implementation Method 2
The term silicone elastomer means cross-linked silicone polymer which swell significantly in a solvent forming a space-filling material
Implementation Method 3
the formulations might develop and show evident signs of phase-separation upon exposure to high temperature which is usually around 50 °C... the composition remains stable over a prolonged period
Data Source
AI summary
Disclosed is a cosmetic composition comprising (i) 1 to 30 wt% of a non-hydrocarbon emollient; and (ii) 2 to 60 wt% of a blend of silicone elastomer gel of the Formula (I) and solvent; wherein the solvent for the silicone elastomer gel is selected from cyclic or linear polydimethylsiloxanes; wherein the w/w ratio of the amount of the non-hydrocarbon emollient to the combined amounts of the silicone elastomer gel and said solvent is from 1:50 to 1:1 and where the amount of the non-hydrocarbon emollient is less than the amount of the silicone elastomer gel; and wherein the composition comprises less than 2 wt% capric caprylic triglycerides and less than 5 wt% crosslinked elastomeric silicone polyether, wherein said non-hydrocarbon emollient is an alkenyl or alkyl ester of a C10-20 fatty acid, an ether-ester, a polyhydric alcohol ester, a wax ester, a mono-, di- or triglyceride, a sterol ester, a fatty alcohol, a fatty acid, lanolin or its derivative, wax ester, a phospholipid, beeswax or a sterol.