Carboxy-Modified Organopolysiloxane Emulsifier for Stable Cosmetics
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Solution Overview
Problem
Silicone-based surfactants face issues with emulsification stability, particularly when combined with zinc oxide microparticles, leading to phase separation and increased stickiness, which compromises the texture of use.
Innovation Solution
The use of carboxy group-modified organopolysiloxanes containing (poly)glycerol or polyoxyalkylene groups as emulsifiers, which are synthesized through hydrosilylation reactions, providing enhanced emulsification stability and storage stability in cosmetic preparations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional silicone-based surfactants are used as emulsifiers, then the cosmetic preparation provides refreshing and non-sticky texture, but the emulsification stability deteriorates and phase separation occurs over time
Solution Approach 1:
The patent modifies the chemical structure of organopolysiloxane by introducing carboxy groups and (poly)glycerol or polyoxyalkylene groups, changing the molecular parameters to achieve both excellent emulsification stability and compatibility with zinc oxide microparticles, thereby preventing phase separation while maintaining non-sticky texture
Solution Approach 2:
The patent creates a composite emulsifier structure combining organopolysiloxane backbone with carboxy groups and (poly)glycerol or polyoxyalkylene groups, which integrates the benefits of silicone base (refreshing texture) with polar groups (emulsification stability) and zinc oxide compatibility
2Reliability
If the amount of emulsifier or thickener is increased to enhance emulsification stability, then the emulsification stability improves, but stickiness increases and texture of use deteriorates
Solution Approach 1:
The patent changes the chemical composition and molecular weight parameters of the organopolysiloxane emulsifier to achieve high emulsification stability at lower concentrations, avoiding the stickiness problem associated with high amounts of conventional emulsifiers while maintaining excellent texture
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 emulsified composition maintains stability over time with minimal changes in viscosity or particle size, resulting in improved emulsification stability and texture in cosmetic preparations.
Implementation Method 1
an emulsified composition obtained by using an organopolysiloxane including a (poly)glycerol group or a polyoxyalkylene group and a carboxy group as an emulsifier
Data Source
AI summary
Provided are an organopolysiloxane having excellent emulsification stability and a cosmetic preparation including the organopolysiloxane are provided. The organopolysiloxane is a carboxy group-modified organopolysiloxane including a (poly)glycerol group or polyoxyalkylene group represented by the following formula (1): [Chem. 1] (R12SiO2/2)a(R1R2SiO2/2)b(R1R3SiO2/2)c(R1R4SiO2/2)d(R1SiO3/2)e(SiO4/2)f(R13SiO1/2)2+e+2f (1) wherein, in the formula, R1 is a monovalent hydrocarbon group, R2 is a (poly)glycerol group or a polyoxyalkylene group, R3 is a carboxy group, and 0 ≤ a ≤ 100, 1 ≤ b ≤ 10, 1 ≤ c ≤ 10, 0 ≤ d ≤ 10, e ≥ 0, and f ≥ 0.