Composite Particles with Silicone Elastomer Coating for Cosmetic Adhesion
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Solution Overview
Problem
Existing cosmetic compositions fail to achieve a natural finish feel while effectively concealing skin configuration troubles such as wrinkles and blemishes, as they often suffer from issues like creasing, poor adhesion, and reduced retention due to the use of diffuse reflectance powders and silica coatings.
Innovation Solution
Composite particles comprising core particles coated with a silicone elastomer using a silicone resin binder, which enhances spreadability, softness, adhesion, and skin-configuration correcting effects, are developed through a method involving hydrolytic condensation reactions with alkoxysilanes and silanol-containing silanes in an aqueous dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If flaky fine powder with spherical fine particulate silica coating is used to achieve high surface diffuse reflectance and soft focus effect, then light diffusion and wrinkle concealment are improved, but adhesion to skin decreases and creasing occurs upon application
Solution Approach 1:
The patent changes the coating material from fine particulate silica to amorphous silica gel particles with controlled specific surface area (5-20 m²/g) and water content (5-20%). This parameter change in the coating material's physical properties resolves the contradiction by providing both light diffusion capability and improved adhesion characteristics, preventing creasing while maintaining soft focus effect.
Solution Approach 2:
The patent creates a composite structure consisting of flaky base particles (mica, talc, or synthetic flaky particles) coated with amorphous silica gel particles. This composite material combines the light-diffusing properties of flaky particles with the adhesion benefits of controlled silica gel coating, simultaneously achieving wrinkle concealment and skin adhesion without creasing.
2Illumination intensity
If fine particulate silica is used as coating material to achieve high surface diffuse reflectance, then light diffusion effect is improved, but contact area with skin decreases and retention of cosmetic effects is lowered
Solution Approach 1:
The patent transforms the coating material from fine particulate silica to amorphous silica gel particles with specific surface area控制在5-20 m²/g and water content控制在5-20%. This parameter change increases the contact area with skin while maintaining high diffuse reflectance, thereby improving both light diffusion effect and retention of cosmetic effects.
3Reliability
If proportion of fine particulate silica in flaky fine powder is lowered to improve adhesion, then adhesion of composite powder to skin is improved, but effects for configuration troubles cannot be obtained sufficiently
Solution Approach 1:
The patent creates a composite material where flaky base particles (providing soft focus effect) are coated with amorphous silica gel particles (providing adhesion). This composite structure allows both functions to coexist: the flaky particles maintain their light-diffusing properties while the silica gel coating provides sufficient adhesion, eliminating the need to reduce silica proportion.
Solution Approach 2:
The patent changes the silica gel particle characteristics (specific surface area: 5-20 m²/g, water content: 5-20%) to achieve optimal adhesion while maintaining the soft focus effect. This parameter optimization allows full utilization of silica gel's adhesion benefits without compromising the cosmetic effects.
4Shape
If cosmetic composition contains diffuse reflectance powder and tacky substance to conceal skin configuration troubles, then wrinkle concealment is improved, but mixing range becomes inappropriate due to sebum mixing and effects are reduced
Solution Approach 1:
The patent integrates the diffuse reflectance powder and adhesion promoter into a single composite particle structure (flaky particles coated with silica gel). This integration eliminates the separate tacky substance that interacts with sebum, maintaining stable mixing characteristics and consistent wrinkle concealment effects throughout the cosmetic composition's shelf life and application period.
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 composite particles provide a natural finish feel, improved adhesion, and effective skin-configuration correction by ensuring the silicone elastomer adheres well to the core particles, maintaining their benefits like freely flowing and soft touch properties.
Implementation Method 1
a silicone elastomer adhered to the surfaces of the core particles
Implementation Method 2
involving hydrolytic condensation reactions with alkoxysilanes and silanol-containing silanes in an aqueous dispersion
Data Source
AI summary
Composite particles formed of core particles and a silicone elastomer adhered to surfaces of the core particles.