Solid Cosmetic Composition With Volatile Binder for Lasting Coverage
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Solution Overview
Problem
Existing solid cosmetic compositions face challenges with high powdery phase content, leading to manufacturing difficulties, poor sensory properties, and inadequate coverage maintenance over time, while high fatty phase content results in hardening and impaired application properties.
Innovation Solution
A solid cosmetic composition comprising at least 15% volatile liquid fatty phase and 40% to 85% powdery phase with spherical fillers surface-treated with metallic soap, optionally with lamellar or nacre fillers, using a specific preparation method involving pre-mixing, extrusion, and pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the proportion of powdery phase is increased to provide good coverage and colour, then the coverage and colour properties are improved, but the composition becomes fragile, brittle, and difficult to manufacture
Solution Approach 1:
The patent changes the physical-chemical parameters of the fatty phase by using volatile liquid fatty phase with specific viscosity and volatility characteristics, allowing higher powdery phase content (40-85%) while maintaining manufacturability and preventing brittleness
Solution Approach 2:
The patent creates a composite system combining volatile liquid fatty phase with specific powdery phase components (spherical fillers, colouring agents, coating agents) to achieve both high coverage and good manufacturing properties simultaneously
2Strength
If the quantity of fatty binder is increased to improve cohesion and reduce brittleness, then the cohesion and impact resistance are improved, but the composition hardens during use and becomes too dense for easy application
Solution Approach 1:
The patent uses volatile liquid fatty phase with specific viscosity parameters that provide adequate cohesion at lower quantities (15-60%) while the volatility prevents hardening during use, maintaining application ease
Solution Approach 2:
The volatile fatty phase acts as a temporary binder that provides cohesion during storage and application but evaporates during use, preventing permanent hardening and density issues
3Manufacturing precision
If the quantity of fatty phase is limited to ensure good compacting, then the compacting quality is improved, but the composition becomes too dry and powdery with poor sensory properties
Solution Approach 1:
The patent uses volatile liquid fatty phase with optimized viscosity and volatility parameters that enable adequate lubrication for compacting at higher quantities (15-60%) while preventing overflow and maintaining good sensory properties
4Ease of manufacture
If more viscous solid products are used to respond to industrial constraints, then the shaping by compacting is improved, but the composition waxes, hardens, and becomes too dense during use
Solution Approach 1:
The patent uses volatile liquid fatty phase with specific viscosity parameters that provide adequate binding for shaping while the volatility prevents waxing and hardening during use, maintaining good spreading properties
Solution Approach 2:
The volatile fatty phase provides temporary binding during manufacturing but evaporates during use, preventing permanent density increase and maintaining application 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
The composition achieves good cohesion, resistance to impact, easy application, and sustained coverage and color, addressing the limitations of conventional compositions.
Implementation Method 1
a volatile liquid fatty phase... allowing the composition to be long-lasting without transferring
Implementation Method 2
a powdery phase comprising spherical fillers which are surface-treated with a metallic soap... good cohesion and good resistance to impact
Data Source
AI summary
A solid cosmetic composition including at least 15% by weight of a volatile liquid fatty phase, 40% to 85% by weight of a powdery phase having spherical fillers which are surface-treated with a metallic soap. Also a method for preparing such a solid cosmetic composition and to a method for making up the skin or lips using same.