Silane Polymer Curable Composition for Optical 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 specific silane compound polymer and a silane coupling agent with an isocyanurate skeleton in a specific ratio, along with an optional silane coupling agent containing a urea structure, is developed to produce a cured product that exhibits superior transparency, heat resistance, and adhesion, and durability with temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a polysilsesquioxane compound is used as the main component to improve heat resistance, then heat resistance is improved, but transparency and adhesion deteriorate
Solution Approach 1:
The invention uses a composite system combining polysilsesquioxane compound (for heat resistance) with silane-modified polyurethane compound (for adhesion and transparency). This composite approach allows each component to contribute its strengths, resolving the contradiction between heat resistance and adhesion/transparency
2Power
If the brightness of optical device is increased to improve performance, then performance is improved, but the cured product deteriorates due to higher-energy light and heat
Solution Approach 1:
The invention converts the harmful high-energy light and heat generated by bright optical devices into beneficial curing energy. The silane-modified polyurethane compound is designed to cure under UV irradiation from blue/white LEDs, transforming the device's operating conditions into the curing mechanism that strengthens the bond
3Reliability
If polysilsesquioxane compound is used as main component to solve adhesion problem, then adhesion is improved, but transparency and heat resistance cannot be sufficiently achieved
Solution Approach 1:
The silane-modified polyurethane compound provides the adhesion enhancement while maintaining transparency, working in conjunction with polysilsesquioxane for heat resistance. This composite system achieves all three properties simultaneously rather than sacrificing one for another
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 that maintains high adhesion and transparency even under high-energy light and temperature conditions, demonstrating excellent durability through heat cycle tests, suitable for use as an optical device adhesive or sealing material.
Implementation Method 1
A curable composition including a component (A) and a component (B) in a mass ratio (component (A):component (B)) of 100:0.3 to 100:90, the component (A) being a silane compound polymer, the component (B) being a silane coupling agent that includes an isocyanurate skeleton 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 100:0.3 to 100:90, the component (A) being a silane compound polymer that is represented by a formula (a-1), wherein 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) being a silane coupling agent that comprises an isocyanurate skeleton in its molecule.(R1SiO3/2)m(R1SiZO2/2)n(R1SiZ2O1/2)o (a-1)