Opaque Silicone Resin Composition for LCD Electrode Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrode protective agents for liquid crystal displays (LCDs) face issues with slow curing, surface tack, and deterioration in curability due to the addition of opaque pigments, leading to increased complexity and cost in protecting driver ICs from light-induced malfunctions.
Innovation Solution
A curable silicone resin composition that is solid at room temperature, comprising an organopolysiloxane, organohydrogenpolysiloxane, platinum group metal-based catalyst, opaque pigment or dye, and reaction retarder, which forms a cured product with excellent mechanical properties, flexibility, and minimal surface tack, suitable for forming an opaque silicone adhesive sheet for shielding electronic components from light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solvent-based resins or alcohol-free resins are used for electrode protective agents, then the resins can be applied to protect liquid crystal electrodes, but the curing time becomes long and the cured product surface exhibits large surface tack
Solution Approach 1:
The patent changes the chemical composition parameters of the resin system by using a specific organopolysiloxane resin with controlled molecular weight and structure (average molecular weight 10,000-100,000, specific siloxane unit ratios), which enables the resin to cure rapidly without surface tack while maintaining protective function. This parameter optimization resolves the contradiction between reliability and curing time.
2Loss of time
If ultraviolet-curable resin is used to achieve rapid curing, then the curing time is reduced, but the addition of opaque pigment causes deterioration in curability of the resin interior
Solution Approach 1:
The patent modifies the resin system parameters by selecting a specific organopolysiloxane resin that is compatible with opaque pigments and can be effectively cured even in the presence of light-shielding materials. The resin's molecular structure and composition are optimized to ensure complete curing throughout the thickness, resolving the contradiction between rapid curing and curability.
Solution Approach 2:
The patent creates a composite material system combining the organopolysiloxane resin with opaque pigment (such as carbon black or metal oxide particles) and catalyst, forming a unified composition where the resin matrix and pigment particles work together to achieve both light shielding and complete curability. This composite approach resolves the contradiction between rapid curing and curability.
3Reliability
If conventional resin systems are used to protect liquid crystal electrodes, then the protective function is achieved, but the process complexity increases and production cost rises
Solution Approach 1:
The patent merges multiple functions into a single resin composition: protection of liquid crystal electrodes, light shielding through opaque pigment, rapid curing, and elimination of surface tack are all achieved in one material system. This eliminates the need for separate processes or materials, reducing process complexity and production cost while maintaining protective function.
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 is easy to handle and process, provides stable light shielding with minimal surface tack, and exhibits excellent mechanical properties, effectively preventing driver IC malfunctions while being applicable to a wide range of electronic components.
Implementation Method 1
comprising an organopolysiloxane, organohydrogenpolysiloxane, platinum group metal-based catalyst
Implementation Method 2
reaction retarder, which forms a cured product
Data Source
AI summary
Disclosed is a curable silicone resin composition that is solid at room temperature, the composition including: (A) an organopolysiloxane having a resin structure consisting of specific siloxane units, (B) an organohydrogenpolysiloxane having a resin structure consisting of specific siloxane units, (C) a platinum group metal-based catalyst, (D) either one or both of an opaque pigment and an opaque dye, and (E) a reaction retarder, in which a layer of thickness 100 µm formed from a cured product of the composition exhibits a light transmittance of not more than 5% across the entire visible light range. The composition is solid at room temperature and therefore easy to handle. Further, the composition is useful for producing an opaque silicone adhesive sheet. A cured product obtained by curing the composition can be used to protect a liquid crystal electrode and shield the electrode from light, thereby preventing malfunction of the driver IC, and also exhibits excellent mechanical properties and flexibility, and displays minimal surface tack.