Polyimide Resin Composition for UV-Stable Display Transmittance
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Solution Overview
Problem
Display devices, such as flat panel displays, are susceptible to discoloration and reduced transmittance when exposed to ultraviolet rays, which can also damage polymer materials and affect their characteristic properties.
Innovation Solution
A resin composition is developed that includes a polyimide, an ultraviolet (UV) absorber represented by Chemical Formula 1, and N-methyl-2-pyrrolidone. The UV absorber is formed by reacting materials represented by Chemical Formula 2 and Chemical Formula 3, and is designed to absorb UV rays without impairing the optical properties of the polymer material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If display devices are exposed to ultraviolet rays, then the materials may be discolored and transmittance reduced, but adding UV absorber may affect optical properties of polymer materials
Solution Approach 1:
The patent modifies the chemical structure of the UV absorber by introducing specific substituents (R1 and R2 groups that can be hydrogen, halogen, aliphatic, or aromatic groups) to adjust its light absorption characteristics. This allows the UV absorber to target specific UV wavelengths while being more selective and less interfering with visible light transmission, thus protecting optical properties while maintaining UV protection
Solution Approach 2:
The patent creates a composite resin composition combining polyimide polymer material with the specially designed UV absorber and N-methyl-2-pyrrolidone solvent. This composite structure allows the UV absorber to be integrated into the polymer matrix, providing UV protection while the polyimide base maintains good optical properties and the specific formulation ensures compatibility between components
2Object-affected harmful factors
If UV absorber is added to protect against discoloration, then ultraviolet ray absorption improves, but manufacturing precision and material composition control become more complex
Solution Approach 1:
The patent specifies precise weight ratio ranges for each component (polyimide: 10-30%, UV absorber: 0.03-0.2%, remaining N-methyl-2-pyrrolidone) to optimize UV protection while maintaining manufacturing feasibility. These controlled parameter ranges balance performance requirements with manufacturing precision capabilities, ensuring consistent product quality
Solution Approach 2:
N-methyl-2-pyrrolidone serves as a solvent intermediary that facilitates the integration of the UV absorber into the polyimide matrix. This intermediary substance enables uniform distribution of the UV absorber at low concentrations (0.03-0.2%), simplifying the manufacturing process while achieving effective UV protection and discoloration prevention
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 resin composition effectively absorbs ultraviolet rays, preventing discoloration and maintaining the transmittance of the display device while ensuring the durability and optical properties of the polymer materials.
Implementation Method 1
the resin composition which absorbs ultraviolet rays
Data Source
AI summary
A resin composition includes a polyimide, an ultraviolet (UV) absorber represented by the following Chemical Formula 1 and a remaining N-methyl-2-pyrrolidone, andwherein, in Chemical Formula 1, R1 and R2 are each selected from a hydrogen group, a halogen group, an aliphatic substituent, and an aromatic group.