Curable Polysilsesquioxane Composition for Optical Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current curable compositions used for optical elements, particularly those emitting blue or white light, face issues with heat resistance and adhesion due to increased brightness, leading to potential delamination and decreased performance over time.
Innovation Solution
A curable composition incorporating a specific polysilsesquioxane compound and silane coupling agents, which produces a cured product with a solid-state Si nuclear magnetic resonance spectrum peak within a specific range, providing excellent heat resistance and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a curable composition including a polysilsesquioxane compound is used to secure optical elements, then adhesion is improved, but heat resistance deteriorates
Solution Approach 1:
The patent uses a composite material system combining polysilsesquioxane compound (for adhesion) with silane coupling agent and curable monomer/oligomer. This composite approach allows the cured product to simultaneously achieve high adhesion (from polysilsesquioxane) and excellent heat resistance (from the silane coupling agent and crosslinked network), resolving the contradiction between adhesion and heat resistance.
Solution Approach 2:
The patent controls the chemical structure parameters of the polysilsesquioxane compound (specifically incorporating organic groups with 1-10 carbon atoms) and adjusts the composition ratios of components to optimize both adhesion and heat resistance properties, achieving a balance between these conflicting requirements.
2Illumination intensity
If optical element brightness is increased, then illumination intensity is improved, but heat generation increases causing cured product deterioration
Solution Approach 1:
The patent converts the harmful effect of heat generation from high-brightness optical elements into a beneficial outcome by designing a curable composition that undergoes exothermic curing reaction. The controlled exothermic reaction during curing helps dissipate heat and prevents heat accumulation that would otherwise cause deterioration, thus converting the potential harm of heat into a beneficial self-regulating mechanism.
Solution Approach 2:
The composite material system with silane coupling agent and curable monomer/oligomer creates a thermally stable cured product that can withstand the heat generated by high-brightness optical elements, maintaining reliability under high illumination intensity conditions.
Data Source
AI summary
The present invention is a curable composition comprising a component (A) and a component (B),the curable composition producing a cured product that has a solid-state Si nuclear magnetic resonance spectrum in which a peak is observed within a range from −80 ppm or more to less than −40 ppm, and a half-width of the peak is 500 to 900 Hz,the component (A) being a curable polysilsesquioxane compound that comprises a repeating unit represented by a formula (a-1),R1SiO3/2 (a-1)the component (B) being at least one silane coupling agent selected from a group consisting of a silane coupling agent that comprises a nitrogen atom in its molecule, and a silane coupling agent that comprises an acid anhydride structure in its molecule, anda method for producing the curable composition, anda cured product, anda method for using the curable composition, andan optical device.