Infrared Coating Composition for Selective Thermal Radiation
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Solution Overview
Problem
Conventional heat dissipating coating materials are inefficient in specific thermal energy wavelength regions due to overlapping infrared absorption and emission characteristics between inorganic particles and binder resins, leading to reduced heat dissipation efficiency.
Innovation Solution
A heat dissipating coating composition comprising an infrared absorbing binder resin and inorganic particles, with specific volume ratios and spectral overlap conditions to optimize infrared absorption and emission characteristics, ensuring high heat dissipation efficiency in targeted thermal energy wavelength regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional heat dissipating coating materials are designed to bring the integral emissivity close to that of a black body (=1) over the entire infrared wavelength region, then the heat radiation efficiency is improved, but the coating material absorbs electromagnetic waves from outside and is not suitable for products that need heat dissipating measures only in a specific temperature region
Solution Approach 1:
The patent applies local quality by designing the coating material to have selective heat radiation properties in specific wavelength regions rather than uniform emission across the entire infrared spectrum. The coating is formulated to radiate heat efficiently in wavelength regions corresponding to specific temperature ranges (e.g., 300-500°C, 500-700°C, 700-900°C) while maintaining low emissivity in other regions, allowing targeted heat dissipation adaptation to different application requirements
Solution Approach 2:
The patent employs parameter changes by adjusting the chemical composition and physical structure of the coating material to control its spectral emissivity characteristics. By varying the types and proportions of inorganic particles, organic resins, and other components, the coating can be tuned to exhibit high emissivity in specific infrared wavelength bands corresponding to desired temperature regions, thereby optimizing heat radiation for particular application scenarios
2Productivity
If the product size is reduced and density is increased, then higher performance is achieved, but it becomes difficult to secure space for installation of physical heat dissipating means
Solution Approach 1:
The patent replaces mechanical heat dissipation systems (such as heat sinks, fans, or heat pipes) with a thermal radiation coating applied directly to the product surface. This substitution eliminates the need for additional mechanical heat dissipation components, saving valuable internal space while maintaining effective heat dissipation through enhanced radiative heat transfer properties of the coating
Solution Approach 2:
The patent utilizes a thin film coating structure that can be applied conformally to product surfaces without requiring significant volume. The coating forms a flexible, adherent layer that provides heat radiation enhancement while occupying minimal space, making it ideal for compact, high-density electronic devices where space for traditional heat dissipation components is limited
3Reliability
If completely sealed housings are used to avoid influence of fine refuse or dust, then product reliability is improved, but heat dissipating effect by convection cannot be expected
Solution Approach 1:
The patent extracts the heat dissipation function from the housing structure itself by applying a specialized thermal radiation coating to the housing surface. This allows the housing to maintain its sealed configuration for dust protection while the coating provides an alternative heat dissipation pathway through enhanced thermal radiation, compensating for the loss of convective heat dissipation
Solution Approach 2:
The patent effectively creates a functional copy of the heat dissipation capability that would otherwise require open structures or vents. The thermal radiation coating replicates the heat dissipation function of convective systems through radiative transfer mechanisms, allowing the housing to remain sealed while achieving comparable heat management performance
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 achieves high heat dissipation efficiency in specific thermal energy wavelength regions, enhancing the strength and adhesion of the cured coating film, particularly suitable for applications where convection-mediated heat dissipation is restricted.
Implementation Method 1
heat dissipating coating materials have been proposed from the viewpoint of heat radiation... inorganic particles that absorb and radiate thermal energy... infrared radiation (electromagnetic waves) radiated from a heat generating article
Data Source
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AI summary
The present invention provides a heat dissipating coating composition in a liquid or paste form for application to a heat generating article, comprising an infrared absorbing binder resin (A), infrared absorbing inorganic particles (B), and an organic solvent, having such proportions of the component (A) and the component (B) that the component (A) is 10 to 70 vol% and the component (B) is 90 to 30 vol% based on the total of both components being 100 vol%, and satisfying conditions 1, 2, and 3 specified herein, and also provides a heat dissipating coating film obtained by applying the heat dissipating coating composition to a heat dissipating article and then thermally curing the composition.