Composite Particles with Surface Modifier for Bleeding Prevention
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Solution Overview
Problem
Existing composite particles used in paints and resin compositions suffer from inadequate dispersibility, stability, light resistance, chromaticity, and tinting strength, as well as bleeding issues, despite various methods proposed in previous patents.
Innovation Solution
Composite particles comprising white inorganic particles coated with a surface modifier and adhered with a dye or lake, which improve dispersibility, stability, and light resistance, while preventing bleeding and enhancing chromaticity and tinting strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If dyes are used as colorants, then clearness of color and high tinting strength are achieved, but light resistance, heat resistance and anti-bleeding property deteriorate
Solution Approach 1:
The patent creates composite particles by combining inorganic particles (such as silica, titania, or zinc oxide) with dyes or lakes. This composite structure allows the inorganic component to provide light resistance and heat stability while the organic dye component maintains high tinting strength and color clarity. The synergistic combination resolves the contradiction between the excellent color properties of dyes and their poor light/heat resistance.
2Reliability
If dyes are fixed onto inorganic particles or nacreous pigment, then light resistance is improved, but tinting strength and chromaticity deteriorate
Solution Approach 1:
The patent optimizes the surface properties of inorganic particles by controlling their surface charge and introducing surface modifiers. By adjusting these parameters, the patent achieves effective dye fixation while preserving the dye's inherent tinting strength and chromaticity. The surface modification allows for controlled adhesion without compromising the optical properties of the dye.
3Strength
If nacreous pigment and coloring pigment are adhered using surface charge modifier in aqueous medium, then adhesion is improved, but dispersibility and color-developing property deteriorate
Solution Approach 1:
The patent employs surface modifiers as intermediary substances that facilitate adhesion between inorganic particles and dyes/lakes. These surface modifiers act as a bridge, enabling strong bonding while maintaining the hydrophobic characteristics necessary for good dispersibility in organic media. The intermediary prevents aggregation and ensures uniform distribution of the composite particles.
4Productivity
If high-speed stirring treatment is applied to form composite particles, then mixing is improved, but bonding force and chromaticity deteriorate
Solution Approach 1:
The patent performs preliminary surface modification of inorganic particles before the actual dye fixation. By pre-treating the particle surfaces with appropriate modifiers and controlling their surface charge states in advance, the patent creates optimal conditions for subsequent dye adhesion. This preliminary preparation ensures strong bonding without requiring excessive mechanical energy input during mixing.
5Strength
If inorganic salt is used to adhere dye onto inorganic compound, then adhesion is improved, but chromaticity and color-developing property deteriorate
Solution Approach 1:
The patent utilizes surface modifiers that can be easily applied and removed, or that remain as beneficial surface layers without interfering with the dye's optical properties. These temporary or surface-level modifiers provide the necessary adhesion function during the coloring process but do not persist in a way that would compromise the final chromaticity or color-developing properties of the composite 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 composite particles exhibit excellent dispersibility, stability, and light resistance, with enhanced chromaticity and tinting strength, effectively preventing bleeding and broadening the coloring range, making them suitable for paints and resin compositions.
Implementation Method 1
a surface modifier coating layer formed on surface of the respective white inorganic particles
Implementation Method 2
a dye coat adhered onto surface of the respective surface modifier-coated white inorganic particles
Data Source
AI summary
Composite particles of the present invention comprise white inorganic particles, a surface modifier coating layer formed on surface of the respective white inorganic particles, and a dye or lake coat adhered onto the surface of the respective surface-modifier-coated white inorganic particles. The composite particles of the present invention not only exhibit excellent color-developing property and tinting strength but also suppress bleeding.