Salt-Stable Polymeric System for High-Active Cosmetic Emulsions
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Solution Overview
Problem
Cosmetic products with high amounts of skin actives, such as Vitamin C, face challenges in maintaining stability and desirable aesthetics due to high salt content, often leading to instability and undesirable textures like pilling or noodling.
Innovation Solution
A direct emulsion cosmetic composition with a salt-stable polymeric system comprising polyacrylate crosspolymer-6, xanthan gum, and clay, which provides a creamy gel cream texture and is resistant to phase separation and pilling, even at high salt concentrations, while incorporating high levels of skin actives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amounts of skin actives such as Vitamin C and pH adjusters are included in the cosmetic composition, then the skin benefits are improved, but the product stability deteriorates due to high salt content causing phase separation and thinning
Solution Approach 1:
The patent changes the chemical parameters of the polymeric system by selecting specific polymers (polyacrylate crosspolymer-6 and xanthan gum) that maintain their stabilizing properties at high salt concentrations. This parameter change allows the system to tolerate high salt content from pH adjusters without phase separation, resolving the contradiction between including skin actives and maintaining product stability.
Solution Approach 2:
The patent uses a composite polymeric system combining two different polymers (polyacrylate crosspolymer-6 and xanthan gum) with complementary properties. This composite approach creates a more robust stabilization system that can handle high salt content while maintaining product homogeneity and preventing phase separation, thus resolving the stability issue caused by high salt content from skin actives.
2Reliability
If high amounts of actives are formulated with high content of oils, emulsifiers or thickeners to stabilize the actives, then the product stability is improved, but the skin feel deteriorates by causing heavy texture, greasiness, or irritation
Solution Approach 1:
The patent changes the composition parameters by using a minimal amount of polymeric thickeners (0.01-5% each) instead of high content thickeners. The selected polymers provide sufficient stabilization at these low concentrations, avoiding the heavy and greasy feel associated with traditional high-content thickener formulations, thus resolving the contradiction between stability and skin comfort.
Solution Approach 2:
The patent applies local quality by using targeted, low concentrations of specific functional polymers that provide stabilization only where needed in the formulation. This localized approach prevents overall formulation heaviness and greasiness while maintaining stability, allowing for a lightweight, non-greasy skin feel despite the presence of high salt content from skin actives.
3Reliability
If polymeric thickeners are used to stabilize high salt content formulations, then the product stability is improved, but the texture deteriorates by causing pilling and noodling upon application
Solution Approach 1:
The patent changes the molecular parameters of the thickening agents by selecting polymers with specific molecular weights and structures (polyacrylate crosspolymer-6 and xanthan gum) that do not form rigid networks prone to pilling. These polymers maintain flexible, smooth textures even at high salt concentrations, preventing the pilling and noodling defects while providing necessary stabilization.
Solution Approach 2:
The patent employs a composite polymeric system where polyacrylate crosspolymer-6 and xanthan gum work synergistically to provide stabilization without texture defects. This combination creates a more balanced rheological profile that maintains product stability at high salt content while preventing pilling and noodling upon application, resolving the texture consistency issue.
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 maintains stability and provides a smooth, lightweight texture, effectively delivering skin benefits like improved smoothness, reduced fine lines, and acne control without pilling or noodling, ensuring the actives are effectively absorbed.
Implementation Method 1
a salt-stable polymeric system comprising a polymer blend and clay such that the cosmetic composition resists pilling, noodling and phase separation at high salt content
Implementation Method 2
The cosmetic composition is provided as a direct emulsion cosmetic composition of intermediate to high viscosity... that is resistant to phase separation and pilling
Implementation Method 3
a salt-stable polymeric system comprising polyacrylate crosspolymer-6, xanthan gum, and one or more clay
Implementation Method 4
The cosmetic composition is provided as a direct emulsion cosmetic composition of intermediate to high viscosity
Data Source
AI summary
A cosmetic composition in the form of a direct oil in water creamy emulsion includes water and oily phases, the water phase including a salt-stable polymeric system that includes polyacrylate crosspolymer-6, xanthan gum, and one or more clay, and high amounts of Vitamin C, oils and emulsifiers and confers a pleasant feel upon application with a smooth, gliding texture and does not severely “pill,”“ball” or “noodle” when applied to the skin. The cosmetic composition does not phase separate into solid/liquid or oily and water based layers.