Surface-Reacted Calcium Carbonate Mattifying Effect
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Solution Overview
Problem
Existing cosmetic and skin care compositions often result in an unnatural appearance and negative skin feel due to the use of synthetic or mineral powders, leading to accentuated skin lines and undesirable sensations such as dryness or oiliness, while failing to effectively conceal imperfections and provide a natural, mattified look.
Innovation Solution
The use of surface-reacted calcium carbonate with a volume median particle size of 0.1 to 90 µm, produced by reacting natural or precipitated calcium carbonate with carbon dioxide and H3O+ ion donors, serves as a skin appearance modifier, providing a mattifying and skin color-modifying effect while enhancing skin feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic or mineral powders are used as opacifying agents, then covering effect is improved, but skin feel becomes unnatural and negative
Solution Approach 1:
The patent changes the surface chemical properties of calcium carbonate particles by reacting them with carbon dioxide and water to form surface-carbonated calcium carbonate. This parameter change in surface chemistry allows the particles to provide natural skin feel while maintaining covering effect, resolving the contradiction between covering capability and skin feel quality.
Solution Approach 2:
The patent creates a composite structure where calcium carbonate particles are surface-carbonated through reaction with CO2 and H2O. This composite material combines the covering properties of calcium carbonate with the natural skin feel properties of surface-carbonated structures, eliminating the need for synthetic mineral powders that cause negative skin feel.
2Reliability
If large amounts of synthetic or mineral powders are used, then skin lines are concealed, but appearance becomes unnatural and artificial
Solution Approach 1:
The patent modifies the surface parameters of calcium carbonate particles through carbonation, creating a natural-looking finish. This surface modification allows effective skin line concealment without the artificial appearance associated with high concentrations of synthetic mineral powders, as the surface-carbonated particles interact more naturally with skin properties.
3Reliability
If conventional powders are used to absorb sebum, then skin sheen is controlled, but skin feel becomes dry or oily
Solution Approach 1:
The patent changes the surface energy and chemical composition of calcium carbonate particles through carbonation, enhancing their sebum absorption capability. The surface-carbonated structure provides improved hydrophobicity and sebum binding properties, allowing effective oil control while maintaining natural skin feel without the dryness or oiliness caused by conventional powders.
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 surface-reacted calcium carbonate effectively conceals wrinkles and imperfections, reduces skin gloss, and offers a smooth, fresh skin sensation, improving the overall appearance and feel of cosmetic and skin care compositions.
Implementation Method 1
the surface-reacted calcium carbonate effectively conceals wrinkles and imperfections, reduces skin gloss
Implementation Method 2
Certain cosmetic compositions are also capable to control the skin sheen to a certain extend by absorbing/adsorbing sebum
Data Source
AI summary
The present invention refers to the use of a surface-reacted calcium carbonate having a volume median particle size d 50 from 0.1 to 90 μm as skin appearance modifier in a cosmetic and/or skin care composition.