Clay-Stabilized Natural Pigment Composition for Cosmetic Color Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Natural dyes, particularly anthocyanins, are unstable and prone to irreversible color changes due to light, temperature, and pH variations, leading to undesirable color deterioration and reduced shelf life in cosmetic applications, while synthetic dyes are preferred for their stability and availability.
Innovation Solution
A composition comprising natural dyes integrated into the cation interlayer of bentonite or kaolin clay substrates through spray drying, maintaining color stability and brightness under various conditions, using pH adjusters to achieve desired shades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If natural dyes are used to provide bright colors in cosmetic products, then color vibrancy and consumer appeal are improved, but color stability and shelf life deteriorate due to light, temperature, and pH sensitivity
Solution Approach 1:
The patent uses clays (bentonite, kaolin, attapulgite) as intermediary substances to adsorb and stabilize natural dye molecules. The clay particles act as a protective medium that shields the dye from environmental factors like light, temperature, and pH changes, thereby maintaining color stability while preserving the vibrant natural colors
Solution Approach 2:
The invention creates composite material systems by combining natural dyes with clay substrates. These composite powders integrate the color-providing properties of natural dyes with the stabilizing and protective properties of clays, achieving both color vibrancy and long-term stability in cosmetic formulations
2Adaptability or versatility
If existing natural substrates are used in cosmetic products, then natural composition is improved, but physical appearance and moisture resistance deteriorate due to dull appearance, unpleasant odor, and hygroscopicity
Solution Approach 1:
The patent selects specific types of clays (bentonite, kaolin, attapulgite) that possess desirable local qualities such as high brightness, low odor, and low hygroscopicity. By carefully choosing the clay substrate type, the invention optimizes specific properties like appearance and moisture resistance while maintaining the overall natural composition
Solution Approach 2:
The clay substrates used in the invention have porous structures that can absorb excess moisture and odors, improving the physical appearance and sensory properties of the cosmetic products. The porous structure also provides a large surface area for dye adsorption, enhancing color intensity
3Device complexity
If natural dyes are used without stabilization, then product simplicity is improved, but shelf life and color consistency worsen due to irreversible color changes and deterioration
Solution Approach 1:
Clay particles serve as a simple intermediary that physically adsorbs dye molecules, protecting them from degradation without requiring complex chemical stabilization systems. This approach extends shelf life and maintains color consistency while keeping the formulation relatively simple
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 at least 50-90% color stability of natural dyes over 30 days at 28°C and 68% humidity, reducing moisture absorption and odor, enhancing brightness and homogeneity in cosmetic applications.
Implementation Method 1
the natural dye is at least partly integrated into a cation interlayer of the bentonite clay substrate
Implementation Method 2
by way of a spray drying process
Data Source
AI summary
A composition is disclosed including a natural dye, a bentonite clay substrate, maltodextrin, and an optional pH adjuster. The composition maintains color stability after storage at 28° C. and 68% relative humidity for 30 days. The color stability includes maintaining one or more of an L* value, an a* value, or a b* value, as measured by reflectance visible spectroscopy at one or more wavelengths between 400 nm and 800 nm.