Fluorinated Photocurable Composition for Low Refractive Index Optical Films
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional refractive index control technologies for optical films face challenges in maintaining low refractive index while ensuring high transmittance, low haze, and strong adhesive and heat-resistant properties, particularly in organic light emitting diodes and image sensors, due to compatibility issues with organic compounds and increased viscosity.
Innovation Solution
A photocurable composition comprising a first olefinic monomer with fluorine, a second olefinic monomer of low viscosity, a photopolymerization initiator, and an amine compound, which when cured, exhibits a refractive index of 1.48 or less, providing excellent optical properties, adhesive force, and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If hollow silica is mixed to lower refractive index, then refractive index is reduced, but transmittance decreases and haze increases
Solution Approach 1:
The patent changes the chemical composition parameters by introducing fluorinated cyclic oligosiloxane D4 units into the inorganic layer structure. This parameter change achieves lower refractive index (1.3-1.5) while maintaining high transmittance and low haze, resolving the contradiction between refractive index reduction and transmittance maintenance
Solution Approach 2:
The patent creates a composite inorganic layer combining SiO2 with fluorinated cyclic oligosiloxane D4 units. This composite material structure achieves the desired optical properties by integrating two different materials with complementary characteristics - SiO2 provides structural stability while the fluorinated D4 units lower the refractive index without compromising transmittance
2Temperature
If hollow silica is mixed to lower refractive index, then refractive index is reduced, but adhesive force decreases due to compatibility problems
Solution Approach 1:
The patent modifies the chemical composition by incorporating fluorinated cyclic oligosiloxane D4 units, which change the surface properties and chemical structure of the inorganic layer. This parameter change enables better compatibility with organic compounds while maintaining low refractive index, thus preserving adhesive force
Solution Approach 2:
The fluorinated cyclic oligosiloxane D4 units act as an intermediary substance within the inorganic layer, facilitating compatibility between the inorganic matrix and organic compounds. This intermediary structure resolves the compatibility problem that would otherwise reduce adhesive force
3Temperature
If hollow silica is mixed to lower refractive index, then refractive index is reduced, but viscosity increases causing decrease in inkjet processability
Solution Approach 1:
The patent changes the compositional parameters by using fluorinated cyclic oligosiloxane D4 units instead of hollow silica. This parameter change maintains low refractive index while avoiding the viscosity increase problem, thereby preserving inkjet processability
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 achieves high transmittance, low haze, and excellent adhesive and heat-resistant properties, enabling the formation of optical films with improved optical properties suitable for high-resolution display devices.
Implementation Method 1
a photopolymerization initiator
Data Source
AI summary
The present disclosure relates to a photo-curable composition, a cured product thereof, and an optical member and a display device comprising same. The photo-curable composition has excellent low refractive index, light transmittance, and low haze characteristics by comprising a first olefinic monomer containing fluorine, a second olefinic monomer having an absolute viscosity of 7 cP or less at 25° C., a photo-polymerization initiator, and an amine compound.