Epoxy Resin Composition for Light-Resistant LED Packaging
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Solution Overview
Problem
Epoxy resin compositions used in light-emitting apparatuses lack sufficient light resistance, heat resistance, and moisture tolerance, leading to yellowish discoloration and poor shear adhesion to silicone, which affects the reliability of these devices over time.
Innovation Solution
An epoxy resin composition combining a triazine derivative epoxy compound, a siloxane compound with cycloaliphatic epoxy and siloxane groups, and a curing agent, where the siloxane group constitutes 10-70 parts by weight per 100 parts of the siloxane compound, enhancing light resistance, heat resistance, and moisture tolerance while maintaining good shear adhesion to silicone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an epoxy resin composition containing triazine derivatives is used to achieve semi-solidification performance, then the semi-solidification performance is improved, but the light resistance, heat resistance, and moisture tolerance deteriorate
Solution Approach 1:
The patent uses a composite material system combining triazine derivative epoxy compound (for semi-solidification), siloxane compound (for light/heat/moisture resistance), and cycloaliphatic epoxy compound (for adhesion and flexibility). This composite approach allows each component to contribute its strengths, resolving the contradiction between semi-solidification performance and environmental resistance.
Solution Approach 2:
The patent specifies precise compositional parameters: triazine derivative epoxy compound (30-70 wt%), siloxane compound (10-50 wt%), and cycloaliphatic epoxy compound (5-20 wt%). By controlling these parameter ranges, the composition achieves both good semi-solidification performance and excellent light/heat/moisture tolerance.
2Strength
If an epoxy resin composition containing triazine derivatives is used, then the semi-solidification performance is improved, but yellowish discoloration occurs over time
Solution Approach 1:
The siloxane compound component in the composite formulation provides excellent UV and light resistance, preventing the yellowish discoloration that would otherwise occur in triazine-based epoxy systems. The combination maintains semi-solidification performance while eliminating the discoloration problem.
Solution Approach 2:
The patent converts the potential harm of triazine derivatives (prone to discoloration) by combining them with siloxane compounds that have superior light stability. The triazine provides the desired semi-solidification while the siloxane protects against discoloration, turning a harmful characteristic into a manageable property.
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 prevents yellowish discoloration and maintains high light and heat resistance, ensuring the reliability and efficiency of light-emitting apparatuses even after long-term exposure to excess heat or light.
Implementation Method 1
the epoxy resin composition prevents yellowish discoloration even after long-term exposure to excess heat or light
Implementation Method 2
an epoxy resin composition that includes: a triazine derivative epoxy compound; a siloxane compound including a cycloaliphatic epoxy group and a siloxane group; and a curing agent
Implementation Method 3
the epoxy resin composition can prevent yellowish discoloration even after long-term exposure to excess heat or light and maintain heat resistance and light resistance, thereby providing a light-emitting apparatus with high efficiency
Data Source
AI summary
An epoxy resin composition provided according to one embodiment of the present invention includes: a triazine derivative epoxy compound; a siloxane compound including a cycloaliphatic epoxy group and a siloxane group; and a curing agent, where the epoxy resin composition includes 10 to 70 parts by weight of the siloxane group with respect to 100 parts by weight of the siloxane compound, thereby providing a composition excellent in heat resistance, light resistance, and excess moisture tolerance, with good shear adhesion to silicone, and capable of semi-solidification.