Colored Metallic Pigment Water Resistance Coating
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Solution Overview
Problem
Existing colored metallic pigments face issues with insufficient water resistance and limited color saturation when used in water-based paints and inks, with some experiencing hydrogen gas reaction and others lacking vivid color tone due to interference-based color development or weak color saturation.
Innovation Solution
A colored metallic pigment is developed with a dense coating film formed on the metallic pigment surface using radical-polymerizable resin or specific compounds like silicon oxide, followed by adhering a coloring pigment, and optionally forming a layer with phosphate or carboxyl groups to enhance adhesion and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coloring pigment is adhered directly to a metallic pigment surface using conventional resin coating, then the manufacturing process is simple, but the water resistance is insufficient and hydrogen gas reaction occurs
Solution Approach 1:
The coating structure is divided into three distinct segments: a metallic pigment core, a polymer resin coating layer, and a coloring pigment layer. This segmentation allows each layer to perform its specific function - the polymer layer provides water resistance and prevents hydrogen gas reaction, while the coloring pigment layer provides color saturation, resolving the contradiction between water resistance and structural complexity.
Solution Approach 2:
The polymer resin coating is formed on the metallic pigment surface before adhering the coloring pigment. This preliminary action creates a protective barrier that prevents water from reaching the metallic pigment, thereby preventing hydrogen gas reaction while providing a stable base for subsequent coloring pigment adhesion.
2Reliability
If a dense polymer resin coating is formed on the metallic pigment surface, then water resistance improves, but the manufacturing precision and coating density control become more difficult
Solution Approach 1:
The polymerization conditions (temperature, time, monomer concentration) are optimized to control the density and thickness of the polymer resin coating. By adjusting these parameters, a dense yet controllable coating is achieved that provides excellent water resistance without making the manufacturing process excessively difficult.
3Ease of manufacture
If conventional coating methods are used without dense polymer resin, then the manufacturing process is easier, but the color saturation and vividness are reduced
Solution Approach 1:
The polymer resin coating acts as an intermediary layer between the metallic pigment and the coloring pigment. This intermediary layer provides a stable surface that enhances the adhesion and color saturation of the coloring pigment, while the entire structure maintains manufacturing feasibility through established polymerization and coating techniques.
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 solution provides superior water resistance and stable, high-color-saturation performance in water-based applications without hydrogen gas release, ensuring durable and vibrant color development.
Implementation Method 1
a dense coating film formed on the metallic pigment surface using radical-polymerizable resin
Implementation Method 2
followed by adhering a coloring pigment
Data Source
AI summary
A colored metallic pigment of the present invention includes a metallic pigment, a first coating layer formed on the surface of the metallic pigment, and a coloring pigment adhered to the surface of the first coating layer. The first coating layer is formed from radical-polymerizable resin or a first compound, and the first compound is an oxide or a hydroxide of at least one element selected from the group consisting of Al, Si, Ti, Cr, Zr, Mo and Ce.