Surface-Treated Pigment Foundations for Coverage and Color Fidelity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cosmetic compositions face challenges in achieving fast drying, spreadable foundations with good coverage and color fidelity, particularly in formulating pigment dispersions to deliver chromatophores effectively.
Innovation Solution
The use of a low molecular weight dimethicone combined with a trimethicone acrylate copolymer, along with surface-treated pigments and film-forming agents, to create stable foundation compositions that maintain high color fidelity and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional pigment dispersions are used to achieve good coverage, then coverage is improved, but color fidelity deteriorates
Solution Approach 1:
The patent changes the physical and chemical parameters of the pigment particles by surface treating them with silanes and controlling their size distribution (D10, D50, D90 ratios). This modifies the pigment properties to maintain color fidelity while achieving good coverage. The specific parameter changes include surface treatment with silane compounds and optimization of particle size distribution ratios.
Solution Approach 2:
The patent creates a composite material system combining pigments with specific surface treatments and controlled particle size distributions. The composite approach involves combining multiple pigment types with different characteristics and treating them with silane compounds to achieve both good coverage and color fidelity simultaneously.
2Ease of operation
If foundation formulations are made spreadable, then ease of application is improved, but drying speed deteriorates
Solution Approach 1:
The patent adjusts the rheological parameters of the foundation formulation by controlling the particle size distribution of pigments and their surface treatments. This creates a balance where the foundation remains spreadable during application but dries quickly afterward. The parameter changes include optimization of D10/D50/D90 ratios and surface treatment characteristics.
3Quantity of substance
If pigment particle size is reduced to improve coverage, then coverage is improved, but color fidelity deteriorates
Solution Approach 1:
The patent optimizes the particle size distribution parameters (D10, D50, D90 and their ratios) to achieve the right balance between coverage and color fidelity. By controlling the distribution rather than simply reducing all particle sizes, the patent maintains color fidelity while improving coverage. The specific parameter optimization includes maintaining appropriate D10/D50/D90 ratios.
Solution Approach 2:
The patent applies different surface treatments to pigment particles based on their size and position in the distribution. Larger particles receive different treatments compared to smaller particles, creating local quality variations that optimize both coverage and color fidelity across the entire pigment population.
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 compositions provide stable, spreadable foundations with good coverage and color fidelity, offering additional optical effects such as luminosity or matte finishes, while being dermatologically acceptable and cosmetically elegant.
Implementation Method 1
a low molecular weight dimethicone combined with a trimethicone acrylate copolymer, which can deliver color dispersion across the skin surface and can provide and maintain high color fidelity
Implementation Method 2
The surface-treated pigments are in a dimethicone dispersion
Data Source
AI summary
The present invention relates generally to methods and compositions useful for cosmetic purposes and include compositions comprising a dimethicone, at least one film-forming agent, and at least one surface-treated pigment, wherein the film-forming agent comprises a dimethicone acrylate copolymer, a trimethicone and/or isobutylmethacrylate/bis-hydroxypropyl dimethicone copolymer.