White Coating Composition Thermal Stability
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Solution Overview
Problem
Conventional white coatings used in display devices with single glass substrates degrade under high temperatures, leading to yellowing or decomposition, making them unsuitable for applications requiring thermal stability and durability.
Innovation Solution
A white coating composition comprising 20-55 parts by weight of silicon dioxide particles, 40-75 parts by weight of inorganic material with a refractive index greater than 2.3, and 5-40 parts by weight of silsequioxane, prepared from specific monomers, which provides thermal resistance and prevents yellowing when subjected to thermal processes up to 400°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional white coating composition including organic polymer and white dye is used, then the coating can be applied at lower temperatures, but the coating degrades and yellows under high temperatures of 300°C
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by replacing organic polymers with inorganic materials (silicon dioxide particles, inorganic material with refractive index >2.3, and silsequioxane), enabling the coating to withstand high temperatures up to 400°C without degradation or yellowing
Solution Approach 2:
The patent creates a composite inorganic coating system combining silicon dioxide particles (20-55 parts by weight), inorganic material with refractive index greater than 2.3 (40-75 parts by weight), and silsequoxane (5-40 parts by weight), which together provide superior thermal stability and prevent yellowing at high temperatures
2Reliability
If inorganic white coating composition requiring sintering at 800°C is used, then the coating achieves high thermal resistance, but the ultra-high temperature damages display device elements
Solution Approach 1:
The patent modifies the processing temperature parameter by formulating a coating that cures at moderate temperatures (100-200°C) rather than requiring sintering at 800°C, achieving thermal resistance without exposing sensitive display device elements to ultra-high temperatures
Solution Approach 2:
The patent provides different materials with specific properties: silicon dioxide particles for thermal stability, high refractive index inorganic material for optical properties and white appearance, and silsequoxane for network formation and adhesion, each contributing to the overall performance at appropriate temperature ranges
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 coating composition exhibits high thermal stability, preventing yellowing and maintaining mechanical strength, making it suitable for use in display devices and mobile communication devices without degrading under high temperatures.
Implementation Method 1
The coating composition exhibits high thermal stability, preventing yellowing and maintaining mechanical strength, making it suitable for use in display devices and mobile communication devices without degrading under high temperatures
Implementation Method 2
40-75 parts by weight of inorganic material, wherein the inorganic material has a refractive index larger than 2.3
Implementation Method 3
5-40 parts by weight of silsequoxane, wherein the silsequoxane is prepared from monomers
Data Source
AI summary
The disclosure provides a white coating composition, and a device employing a coating made of the composition. The white coating composition includes 20-55 parts by weight of silicon dioxide particles, 40-75 parts by weight of inorganic material, and 5-40 parts by weight of silsequioxane, wherein the silsequioxane is prepared from monomers comprising a first monomer represented by the Formula (I) and a second monomer represented by the Formula (II)wherein, R1 is independently the same or different methyl or ethyl, and R2 is independently the same or different C1-6 alkyl.