Acrylic Adhesive Composition for Display Panels
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Solution Overview
Problem
Conventional adhesives for display panels, such as LCD and OLED devices, face limitations in maintaining adhesion and durability under severe high-temperature and humid conditions, as well as external physical impacts, leading to issues like peeling and deterioration of optical properties.
Innovation Solution
An adhesive composition comprising an acrylic copolymer, a non-yellowing isocyanate-based or aziridine-based crosslinking agent, and an organosilicon compound with at least two carbonyl groups, which forms an adhesive layer with improved chemical stability and reworkability, enhancing adhesion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesives are used for display panels, then initial adhesion is achieved, but adhesion and durability deteriorate under severe high-temperature and humid conditions
Solution Approach 1:
The patent uses a composite adhesive system combining acrylic copolymer base resin with silane crosslinking agents and organometallic catalysts. This composite formulation creates a multi-component adhesive layer that maintains bonding strength under high-temperature and humid conditions while preventing peeling and deterioration of optical properties.
Solution Approach 2:
The patent modifies the chemical composition parameters of the adhesive by incorporating specific ratios of acrylic copolymer, silane crosslinking agent, and organometallic catalyst. This parameter optimization enables the adhesive to maintain its bonding properties and chemical stability under severe environmental conditions including high temperature and humidity.
2Strength
If strong adhesion is achieved through conventional adhesives, then initial bonding is secured, but reworkability is lost under severe conditions
Solution Approach 1:
The patent creates a dynamic adhesive system where the organometallic catalyst enables reversible crosslinking reactions. The adhesive maintains strong bonding strength during normal operation but allows for controlled reworkability when needed, even after exposure to high-temperature and humid conditions. This dynamic property enables the adhesive to adapt between bonded and reworkable states.
3Reliability
If adhesive durability is improved under humid conditions, then peeling is prevented, but optical properties may deteriorate
Solution Approach 1:
The patent applies local quality by using transparent organometallic catalysts and silane crosslinking agents that maintain optical clarity while providing durability. The adhesive composition is specifically designed to resist yellowing and maintain transparency in the visible spectrum while delivering enhanced durability and peeling resistance under humid conditions.
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 adhesive composition ensures reliable adhesion and durability under severe conditions, maintaining adhesive properties and preventing peeling or damage to the display panel, while allowing for reworkability even after extended exposure to heat and moisture.
Implementation Method 1
an organosilicon compound having at least two carbonyl groups
Implementation Method 2
a non-yellowing type isocyanate-based or aziridine-based crosslinking agent
Implementation Method 3
an adhesive or adhesive sheet capable of adhering the display structure while having high wettability and durability
Data Source
AI summary
An adhesive composition includes an acrylic copolymer, a non-yellowing type isocyanate-based or aziridine-based crosslinking agent, and an organosilicon compound having at least two carbonyl groups. An adhesive layer formed from the adhesive composition may have high adhesiveness to the base film, and provide an optical film having improved reworkability even after being left for a long period of time under severe conditions such as high temperature/high humidity.