Aqueous White Conductive Primer Coating Composition
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Solution Overview
Problem
Existing white conductive primer coating materials for plastic substrates face issues with insufficient weather resistance, brightness, and smoothness of the coating film.
Innovation Solution
An aqueous white conductive primer coating composition containing a binder component and a carbon nanotube dispersion liquid, which forms a coating film with an L* value of whiteness of 80 or more and a surface resistivity of 10^8 Ω/□ or less, enhancing conductivity and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional white conductive primer coating material is used, then conductivity is achieved, but brightness and smoothness of the coating film are insufficient
Solution Approach 1:
The patent uses a composite binder system comprising both polyolefin resin and acrylic resin, combined with specific titanium dioxide pigments and conductive fillers. This composite material approach allows simultaneous achievement of high brightness (L*≥80), good conductivity (surface resistivity ≤10^8 Ω/□), and improved weather resistance by leveraging the complementary properties of different materials.
Solution Approach 2:
The patent optimizes specific parameters including the chlorine content of polyolefin resin (10-40 wt%), the molecular weight and composition of acrylic resin, particle size distribution of titanium dioxide (D50: 0.5-2.0 μm), and conductive filler content. By precisely controlling these parameters, the coating achieves high brightness, smooth surface finish, and adequate weather resistance.
2Illumination intensity
If a white primer coating material is used to achieve high brightness, then brightness is improved, but conductivity is reduced
Solution Approach 1:
The patent combines white titanium dioxide pigments for brightness with conductive fillers (such as metal powders or conductive carbon materials) in the primer coating. This composite formulation maintains high brightness (L*≥80) while ensuring sufficient conductivity (surface resistivity ≤10^8 Ω/□) for electrostatic coating application.
3Object-affected harmful factors
If conventional coating materials are used, then basic coating function is achieved, but environmental harm and energy consumption increase
Solution Approach 1:
The patent employs an aqueous-based coating material that can be applied as a thin film and cured to form a durable coating. The aqueous formulation reduces environmental harm compared to solvent-based systems, while the optimized composition ensures proper film formation and performance despite the lower viscosity and different evaporation characteristics of water-based systems.
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 composition achieves a coating film with high brightness and sufficient conductivity on plastic substrates, allowing for a multilayer coating with improved optical properties and reduced waste.
Implementation Method 1
a coating film formed by the aqueous white conductive primer coating composition has an L* value of whiteness based on a CIE color-matching function of 80 or more and a surface resistivity of 10^8 Ω/□ or less
Implementation Method 2
electrostatic coating having excellent coating efficiency has been studied and adopted
Data Source
AI summary
The purpose of the present invention is to provide a white conductive primer coating composition with which it is possible to form, on a plastic base material, a coating film of high brightness and adequate conductivity. The present invention pertains to an aqueous white conductive primer coating composition that contains a binder component (A) and a carbon nanotube dispersion liquid (B), wherein: a coating film formed with said aqueous white conductive primer coating composition has a L∗ value of at least 80 according to whiteness based on the CIE color-matching function and has a surface electrical resistivity of 108 Ω/□ or lower.