Curable Silicone Composition for Display Filler Haze Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display fillers face issues with visibility due to internal stress from curing shrinkage and transparency degradation, especially in high-temperature and humidity environments, where silicone compositions exhibit low moisture content and phase separation leading to haze.
Innovation Solution
A curable composition comprising a first silicone oligomer with curable functional groups and a hydroxyl-containing second silicone oligomer, optimized in weight ratios and hydroxyl value, to enhance moisture content and reduce haze, ensuring transparency and adhesive durability in high-temperature and humidity conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a silicone composition is used as a filler for display, then yellowing due to curing shrinkage is reduced, but transparency degradation occurs due to phase separation in high-temperature and humidity environments
Solution Approach 1:
The patent modifies the chemical composition parameters of the silicone filler by incorporating hydroxyl-containing components (5-50 wt%) into the polysiloxane structure. This changes the molecular polarity and moisture interaction parameters, enabling the filler to maintain transparency in high-humidity environments while retaining the yellowing resistance of silicone-based materials.
Solution Approach 2:
The invention creates a composite silicone filler system combining hydrophobic polysiloxane chains with hydrophilic hydroxyl groups. This composite structure integrates the advantages of both components: the polysiloxane provides yellowing resistance while the hydroxyl groups prevent phase separation and maintain transparency under humid conditions.
2Quantity of substance
If polydimethylsiloxane chain is used to form main skeleton, then moisture content rate is lowered due to hydrophobicity, but phase separation occurs at room temperature when moisture is introduced in high-temperature and humidity environment causing haze
Solution Approach 1:
The patent applies local quality modification by introducing hydroxyl groups at specific positions within the polysiloxane chain structure. These localized hydrophilic regions create moisture absorption sites that balance the overall hydrophobic matrix, preventing phase separation while maintaining appropriate moisture content for 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 curable composition maintains excellent transparency and adhesive durability, with haze reduced to 1.0% or less even after exposure to high-temperature and high-humidity environments, effectively addressing the issues of shrinkage and yellowing associated with traditional silicone fillers.
Implementation Method 1
it comprises a hydroxyl-containing component capable of increasing moisture content rate, so that it can reduce haze even in a high-temperature and high-humidity environment
Implementation Method 2
visibility decrease due to display defects when an internal stress due to shrinkage occurs upon curing
Data Source
Figure 1~2
AI summary
The present application relates to a curable composition and a use thereof. The present application can provide a curable composition having excellent physical properties such as adhesive durability as well as maintaining transparency even in a high-temperature and high-humidity environment. Such a curable composition can be usefully used for direct bonding between a filler and an optical member of a display device.