Silane Curable Composition for Optical Device Adhesion
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Solution Overview
Problem
Current curable compositions used for optical devices face challenges in achieving excellent transparency, heat resistance, and adhesion while maintaining durability with temperature changes, particularly with the increased brightness and heat generated by modern optical devices.
Innovation Solution
A curable composition comprising a silane compound polymer and a silane coupling agent with a sulfur atom-containing functional group in a specific ratio, which produces a cured product exhibiting excellent transparency, heat resistance, and adhesion, and durability with temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polysilsesquioxane compound is used as main component to improve heat resistance, then heat resistance is improved, but transparency and adhesion deteriorate
Solution Approach 1:
The invention uses a composite material system combining polysilsesquioxane compound (component A) with organometallic compound (component B) and silane coupling agent (component C). This composite approach allows the cured product to simultaneously achieve heat resistance from the polysilsesquioxane network, transparency through the organometallic compound's optical properties, and adhesion via the silane coupling agent's bonding capabilities to both inorganic and organic substrates.
2Power
If optical device brightness is increased to improve performance, then device performance is improved, but heat generation increases causing cured product deterioration
Solution Approach 1:
The invention changes the chemical composition parameters of the curable composition by incorporating organometallic compounds with high thermal stability and silane coupling agents that maintain adhesion at elevated temperatures. The cured product's thermal degradation temperature is shifted to higher values, allowing it to withstand the heat generated by high-brightness optical devices without deteriorating adhesion properties.
3Temperature
If polysilsesquoxane compound is used to improve heat resistance, then heat resistance is improved, but transparency deteriorates
Solution Approach 1:
The composite formulation combines polysilsesquioxane compound (providing heat resistance through inorganic network formation) with organometallic compound (providing transparency through its optical properties). The silane coupling agent bridges these components, creating a hybrid material where the inorganic polysilsesquioxane network provides thermal stability while the organic organometallic compound maintains optical transparency.
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 effectively forms a cured product with high adhesion and heat resistance, maintaining performance even after exposure to high-energy light and temperature fluctuations, making it suitable for optical device adhesives and sealing materials.
Implementation Method 1
a curable composition comprising a silane compound polymer (A) and a silane coupling agent (B) that includes a sulfur atom-containing functional group in its molecule
Data Source
AI summary
The present invention is : a curable composition comprising a component (A) and a component (B) in a mass ratio (component (A):component (B)) of 100:0.1 to 100:50; a cured product obtained by curing the curable composition; and a method for using the curable composition as an optical device-securing adhesive or an optical device sealing material. The component (A) is a silane compound polymer that is represented by a formula (a-1)(where in the formula: R1 is a group selected from an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, Z is a hydroxyl group, an alkoxy group having 1 to 10 carbon atoms, or a halogen atom, m is a positive integer, and n and o are independently 0 or a positive integer, provided that a plurality of R1 are either identical or different, and a plurality of Z are either identical or different.), and the component (B) is a silane coupling agent that comprises a sulfur atom-containing functional group in its molecule. (R1SiO3/2)m(R1SiZO2/2)n(R1SiZ2O1/2)o ··· (a-1)