D4 D5-Free Liquid Makeup with Silica Sebum Control
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Solution Overview
Problem
The challenge is to create commercially viable color cosmetic compositions that exhibit stable color, transfer resistance, and a matte finish over time, while being resistant to skin secretions, without using D4 and D5 solvents.
Innovation Solution
The compositions include a solvent system of methyltrimethicone and low viscosity dimethicone, a film former system of trimethylsiloxysilicate (TMS), surface-treated pigments, and a sebum-controlling system with silica shells and mica, all without D4 and D5.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If D4 and D5 solvents are used to achieve transfer-proofness and color stability, then the makeup exhibits stable color and transfer resistance, but the composition fails regulatory compliance due to environmental persistence concerns
Solution Approach 1:
The patent removes D4 and D5 solvents from the composition entirely, extracting the problematic substances while maintaining the core functional benefits through alternative solvent systems and film-forming agents that do not persist in the environment
Solution Approach 2:
The patent changes the chemical parameters of the solvent system by using alternatives with different volatility and persistence characteristics, thereby achieving the same transfer-proofness function without the harmful environmental persistence of cyclomethicones
2Duration of action of stationary object
If D4 solvent is used to achieve transfer-proofness through film formation, then the makeup becomes more stable and durable, but the composition contributes to environmental pollution
Solution Approach 1:
The patent extracts D4 from the formulation while replacing its film-forming function with alternative agents that provide comparable durability without generating environmental pollution
Solution Approach 2:
The patent employs solvent and film-forming systems that are environmentally degradable and do not persist in the environment, replacing the long-lasting but polluting D4 with shorter-lived, benign alternatives
3Manufacturing precision
If pigments are ground and predispersed in silicone solvent to improve color strength, then optimal pigment dispersion is achieved, but the process becomes more complex without D4 and D5
Solution Approach 1:
The patent adjusts pigment particle size parameters and surface treatment characteristics to achieve optimal dispersion in the alternative silicone solvent system, compensating for the absence of D4 and D5 through controlled particle morphology and surface properties
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
This solution achieves color-fastness, transfer resistance, and a pleasant feel over time, while maintaining a matte finish and resisting skin secretions, thereby addressing the need for D4 and D5-free cosmetic compositions.
Implementation Method 1
D4 dries, and forms a film on the skin that renders makeup coverage more stable and durable
Implementation Method 2
a film former system comprising trimethylsiloxysilicate (TMS)
Implementation Method 3
the pigments may be surface treated. Dispersants may also be used to prevent agglomeration of previously dispersed pigment
Implementation Method 4
a sebum-controlling system comprising one or more of silica shells, platy mica, and sebum regulators
Data Source
AI summary
Cosmetic compositions are water-in-silicone emulsions that are free of D4 and D5. The external phase comprises a solvent system of methyltrimethicone and low viscosity dimethicone; a film former system comprising trimethylsiloxysilicate (TMS); rheology modifiers; a pigment system that comprises one or more pigments that are surface treated with triethoxycaprylylsilane; and a first part of a sebum-controlling system that comprises spherical and ellipsoidal silica shells. The aqueous phase may comprise a second part of the sebum-controlling system, water-soluble skin care actives and a preservative system.