Flaky Particulate Material Coated with Fatty Acid Metal Salt
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Solution Overview
Problem
Current flaky particulate materials for cosmetics lack both high transparency and smoothness, with boron nitride being too whitish and other materials being inferior in smoothness while superior in transparency, failing to provide a natural tone and comfortable use.
Innovation Solution
A process involving surface-treating mica, synthetic mica, sericite, talc, or barium sulfate with a fatty acid metal salt to achieve a flaky particulate material with a low coefficient of friction, high total light transmittance, and a specific reflection-intensity ratio, resulting in excellent smoothness and transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If boron nitride is used as a flaky particulate material, then smoothness is improved, but transparency deteriorates (whitish appearance)
Solution Approach 1:
The patent uses fatty acid metal salts as intermediary substances to coat the surface of flaky particles. This coating layer mediates between the smoothness-providing boron nitride and the transparency requirement, allowing the underlying particle to maintain its low friction properties while the coating enables natural skin tone appearance by improving light transmission.
Solution Approach 2:
The invention creates a composite structure where flaky particles (such as boron nitride) are combined with fatty acid metal salts on their surface. This composite approach allows the core particle to provide smoothness while the surface coating provides transparency, achieving both properties simultaneously in a single material system.
2Illumination intensity
If other flaky particulate materials (talc, mica, sericite, barium sulfate, aluminum oxide) are used, then transparency is improved, but smoothness deteriorates
Solution Approach 1:
The patent changes the surface parameters of flaky particles by coating them with fatty acid metal salts. This surface modification alters the friction characteristics and optical properties of materials like talc, mica, and barium sulfate, transforming them from having high friction to providing excellent smoothness while maintaining their inherent transparency.
Solution Approach 2:
Fatty acid metal salts serve as an intermediary coating layer that modifies the surface properties of transparent flaky particles. This coating mediates between the particle surface and the skin, reducing friction and improving smoothness without compromising the transparency of the underlying particle material.
3Ease of operation
If flaky particulate material is used to provide smoothness, then comfort of use is improved, but natural tone appearance deteriorates (whitish look)
Solution Approach 1:
The fatty acid metal salt coating acts as an intermediary that allows the flaky particle to provide comfort through smoothness while simultaneously allowing natural light transmission for a natural skin tone appearance, eliminating the whitish look associated with uncoated particles.
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 treated flaky particulate material provides a cosmetic composition with great comfort of use, natural tone, and a matt appearance, surpassing the limitations of existing materials by offering both high smoothness and transparency.
Implementation Method 1
a fatty acid metal salt that is deposited on the substrate particle by surface treatment
Implementation Method 2
a total light transmittance of not less than 85%
Data Source
AI summary
The present invention has an object to provide a flaky particulate material giving skin an excellent smoothness, which is free from whitening problem upon use thereof owing to its high transparency. The present invention also has another object to provide a cosmetic composition containing the flaky particulate material. The present invention relates to flaky particulate material, which has an average coefficient of friction is not more than 0.50, and a total light transmittance is not less than 85%. A particle in the flaky particulate material comprises a substrate particle made of one material selected from the group consisting of mica, a synthetic mica, sericite, talc, barium sulfate and aluminum oxide. The present invention provides a flaky particulate material that gives skin excellent smoothness, a natural tone, and a matt appearance. The flaky particulate material of the present invention gives a cosmetic composition which provides great comfort of use, and an excellent appearance.