Infrared-Transmissive Curable Composition for Stable Dye Dispersion
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Solution Overview
Problem
Current infrared-transmissive curable compositions based on silicone resins or curable resins with an organosilicon skeleton face compatibility issues with dyes, leading to agglomeration over time, and lack sufficient infrared transmittance and visible light blockage.
Innovation Solution
A curable composition comprising an addition reaction product between a compound with silicon-bonded hydrogen atoms and a polycyclic hydrocarbon, a dye with specific absorption bands, an organosilicon compound without reactive groups, a hydrosilylation reaction catalyst, and hydrophobic fumed silica, which prevents dye agglomeration and enhances infrared transmittance and visible light blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If silicone resins or curable resins with organosilicon skeleton are used as infrared-transmissive encapsulants, then infrared transmittance is improved, but dye compatibility deteriorates causing dye agglomeration over time
Solution Approach 1:
The invention changes the chemical composition parameters of the curable resin by incorporating specific organosilicon compounds with silicon-bonded hydrogen atoms and polycyclic hydrocarbons with addition-reactive double bonds. This parameter change creates a resin system that simultaneously achieves high infrared transmittance and excellent dye compatibility, preventing dye agglomeration over time while maintaining the desired optical properties.
Solution Approach 2:
The invention creates a composite curable composition by combining multiple components: organosilicon compounds, polycyclic hydrocarbons, dyes, and catalysts. This composite material approach allows the system to achieve properties that individual components cannot provide alone, specifically combining infrared transmittance with dye compatibility and resistance to agglomeration.
2Object-affected harmful factors
If dyes are added to improve visible light blockage, then visible light filtering is improved, but infrared transmittance may deteriorate
Solution Approach 1:
The invention applies local quality by selecting dyes with specific absorption characteristics that target the visible light range (350-650 nm) while being transparent in the infrared range (800-900 nm). This allows different parts of the electromagnetic spectrum to be treated differently, blocking visible light while transmitting infrared radiation.
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 cures into a product with improved infrared transmittance and visible light blockage, preventing dye agglomeration and offering enhanced storage stability, making it suitable for optical devices and opto-semiconductor encapsulants.
Implementation Method 1
an addition reaction product between (a) a compound having two silicon-bonded hydrogen atoms per molecule... and (b) a polycyclic hydrocarbon having two addition-reactive carbon-carbon double bonds per molecule
Implementation Method 2
a dye having an absorption band in the wavelength region of 350 to 650 nm and capable of transmitting at least a portion of light of wavelength 800 to 900 nm
Implementation Method 3
highly infrared transmissive and visible light blocking
Data Source
AI summary
A composition comprising components (A) to (E) below, due to an excellent compatibility with dyes, can inhibit timewise dye aggregation, and has a high infrared transmissivity and a high visible light-blocking performance.(A) An addition reaction product between a compound (a) with formula (1) and a polycyclic hydrocarbon (b) having two carbon-carbon double bonds in each molecule, the addition reaction product having two carbon-carbon double bonds in each molecule(R1 represents, e.g., a monovalent hydrocarbon group, and R2 represents a divalent hydrocarbon group)(B) A dye that has an absorption band in the wavelength region of 350-650 nm and that transmits at least a portion of light having a wavelength of 800-900 nm(C) An organosilicon compound having in each molecule at least two silicon atom-bonded hydrogen atoms, and lacking a carboxylic acid anhydride group, alkoxysilyl group, epoxy group, or a group containing an addition-reactive carbon-carbon double bond(D) A hydrosilylation reaction catalyst(E) Hydrophobic fumed silica.