ITO Particle Transparent Resin Composition for Heat Ray Shielding
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Solution Overview
Problem
Existing heat ray-shielding films and coatings fail to effectively shield infrared light of wavelengths 1,450 nm to 1,750 nm while maintaining high visible light transmittance and abrasion resistance, leading to inadequate temperature control in vehicles and buildings.
Innovation Solution
A transparent resin composition containing indium tin oxide (ITO) particles with specific color and surface area characteristics, dispersed to achieve high heat ray-shielding efficacy while ensuring high visible light transmittance and abrasion resistance, formulated with a specific surface modifier to enhance particle dispersion and binding with the resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metal oxide particles or organic compounds are dispersed in transparent resin to create heat ray-shielding coating, then heat ray-shielding properties are improved, but transparency and abrasion resistance deteriorate
Solution Approach 1:
The patent changes the particle size parameter of ITO to a specific range (0.1-10 μm, preferably 0.5-5 μm) and controls the content of ITO particles (5-50 wt%, preferably 10-30 wt%) to achieve optimal balance between heat ray-shielding properties and transparency. This parameter optimization resolves the contradiction by finding the sweet spot where sufficient heat shielding is achieved without compromising transparency
Solution Approach 2:
The patent uses ITO (indium tin oxide) particles as the heat ray-shielding filler within the transparent resin matrix, creating a composite coating material. The specific composition (ITO particles with controlled size and content in transparent resin) provides both heat ray-shielding functionality and maintains transparency, resolving the contradiction between these two properties
2Object-affected harmful factors
If metal oxide particles or organic compounds are dispersed in transparent resin to create heat ray-shielding coating, then heat ray-shielding properties are improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent optimizes the particle size of ITO within 0.1-10 μm and content at 5-50 wt%, which ensures sufficient heat ray-shielding while maintaining good dispersion and adhesion in the resin matrix. This parameter control prevents particle aggregation and ensures uniform distribution, thereby maintaining abrasion resistance
Solution Approach 2:
The patent applies the coating with a specific thickness range (1-10 μm, preferably 2-5 μm) to ensure adequate heat ray-shielding performance while minimizing the impact on the overall structure and abrasion resistance of the glass surface. The localized control of coating thickness resolves the contradiction between shielding effectiveness and durability
3Ease of manufacture
If cross-linkable compound is mixed with metal oxide particles to prepare coating composition, then polymerization reaction occurs, but poor reaction between cross-linkable compound and metal oxide surface results in deteriorated heat ray-shielding properties and transparency
Solution Approach 1:
The patent uses a silane coupling agent as an intermediary substance that bridges the organic cross-linkable compound and the inorganic metal oxide particle surfaces. The silane coupling agent contains both organic functional groups that react with the cross-linkable compound and inorganic functional groups that bond to the metal oxide surface, thereby improving the polymerization reaction efficiency and maintaining heat ray-shielding properties
Solution Approach 2:
The patent replaces the direct chemical reaction between cross-linkable compound and metal oxide surface with an indirect reaction mechanism mediated by silane coupling agent. This substitution allows for better reaction kinetics and more uniform distribution of cross-linked polymer network, improving both the manufacturing process and the final heat ray-shielding 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 solution provides a transparent resin composition and heat ray-shielding film with enhanced heat shielding properties within the 1,450 nm to 1,750 nm wavelength range, maintaining high visible light transmittance and abrasion resistance, effectively addressing the limitations of existing technologies.
Implementation Method 1
a heat ray-shielding film which transmits visible light but shields infrared light... Particularly, by shielding infrared rays of a wavelength of 1,450 nm to 1,750 nm, the scorching sensation can be suppressed
Implementation Method 2
a heat ray-shielding coating composition is used which is obtained by dispersing metal oxide particles reflecting⋅absorbing heat rays, such as tin oxide, antimony-doped tin oxide (ATO), and tin-doped indium oxide (indium tin oxide, ITO)
Data Source
AI summary
Provided is a transparent resin composition having a higher heat ray-shielding effect that can particularly effectively shield light of a wavelength of 1,450 nm to 1,750 nm while ensuring a high visible light transmittance. The transparent resin composition contains a transparent resin-forming component and inorganic particles, in which the inorganic particles contain indium tin oxide (ITO) and have a color having an L* value of 30 or more and 55 or less and a b* value of −18 or more and −10 or less in the Lab color space.