Composite Particle Cosmetics for Spreading, Adherence, and Finish
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Solution Overview
Problem
Existing cosmetic technologies lack excellent spreading, adherence, and finish properties, particularly in solid powder cosmetics, with insufficient focus on formability, rubbing-off, and anti-caking properties.
Innovation Solution
A cosmetic comprising composite particles made of inorganic nucleating agents, such as glass or sparingly soluble sulfate salts, and metal soaps like calcium or magnesium salts, with specific incorporation rates and grain size distributions to enhance spreading, adherence, and finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If metal soap particles with inorganic particles are used to improve spreading property, then spreading property is improved, but adherence to skin and lips, eyelashes and finish properties are not sufficiently addressed
Solution Approach 1:
The patent creates composite particles consisting of metal soap particles (calcium or magnesium stearate) and inorganic particles (silica, titanium oxide, or zinc oxide) in specific size ratios. The inorganic particles are coated on the metal soap particles to form a composite structure that simultaneously provides spreading property from the metal soap and adherence/finish properties from the inorganic coating layer.
Solution Approach 2:
The patent applies different properties to different parts of the composite particle: the metal soap core provides spreading property while the inorganic particle coating layer provides adherence and finish properties. This local differentiation of functionality resolves the contradiction between spreading and adherence/finish.
2Reliability
If conventional powder cosmetics are used, then basic cosmetic functions are provided, but formability, rubbing-off property and anti-caking properties are insufficient
Solution Approach 1:
The patent optimizes specific parameters including the size ratio between metal soap particles (5-50 μm) and inorganic particles (1-10 μm), the content ratio of metal soap to inorganic particles (95:5 to 50:50), and the particle size distribution (D50 values). These parameter optimizations simultaneously improve formability, rubbing-off property, and anti-caking properties while maintaining basic cosmetic functions.
3Ease of operation
If metal soap particles are used to enhance flowability and feeling, then flowability and feeling are improved, but anti-caking property and adherence are not sufficiently described
Solution Approach 1:
The composite particle structure combines metal soap particles (providing flowability and feeling) with inorganic particle coatings (providing anti-caking and adherence properties). The inorganic coating layer prevents particle aggregation while the metal soap core maintains flowability and skin feeling.
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 excellent spreading, adherence, and finish properties, along with good formability and anti-caking, resulting in improved cosmetic performance.
Implementation Method 1
composite particles contain an inorganic nucleating agent and a metal soap; the inorganic nucleating agent is at least one selected from the group consisting of glass particles and sparingly soluble sulfate salt particles
Data Source
AI summary
A novel cosmetic that exhibits an excellent extension when applied, also an excellent adherence post-application and/or an excellent finish post-application, as well as a good use sensation, can be provided by a composite particle-containing cosmetic wherein: the composite particle contains an inorganic nucleating agent and a metal soap; the inorganic nucleating agent is at least one selected from the group consisting of glass particles and sparingly soluble sulfate salt particles; and the metal soap is the salt of a fatty acid and at least one selected from the group consisting of calcium and magnesium.