Fluorinated Aromatic Compound for Optical Resins
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Solution Overview
Problem
Current thermosetting resins used in optical and electronic equipment lack sufficient transparency, heat resistance, and mechanical properties, particularly in high-temperature applications, and fluorinated polyimide optical waveguides are brittle and expensive to produce.
Innovation Solution
A fluorinated aromatic compound with at least two carbon-carbon unsaturated bonds is developed, which can be used to create a curable material that forms a cured product with enhanced transparency, heat resistance, and mechanical properties through a condensation reaction involving specific aromatic compounds and HF elimination agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an aromatic epoxy resin is used to achieve heat resistance, then heat resistance is improved, but transparency in the near ultraviolet region deteriorates
Solution Approach 1:
The invention changes the chemical structure parameters of the epoxy resin by introducing fluorinated aromatic groups and controlling the aromatic ring content (0.1-5 mmol/g) to achieve both heat resistance and near-ultraviolet transparency. This parameter optimization resolves the contradiction between thermal stability and optical transparency.
Solution Approach 2:
The invention creates a composite epoxy resin system combining fluorinated aromatic structures with aliphatic chains, achieving synergistic effects that provide both high heat resistance (glass transition temperature ≥100°C) and excellent near-ultraviolet transparency, resolving the trade-off between these two properties.
2Illumination intensity
If an alicyclic epoxy resin is used to achieve transparency in the near ultraviolet region, then transparency is improved, but heat resistance deteriorates
Solution Approach 1:
The invention modifies the epoxy resin composition by controlling the aromatic ring content within 0.1-5 mmol/g and introducing fluorinated structures, which enhances heat resistance while preserving near-ultraviolet transparency. The glass transition temperature is raised to ≥100°C without sacrificing optical properties.
3Temperature
If a fluorinated polyimide is used to achieve heat resistance and transparency, then heat resistance and transparency are improved, but mechanical properties deteriorate due to brittleness
Solution Approach 1:
The invention develops a composite epoxy resin system incorporating fluorinated aromatic structures with flexible aliphatic chains. This composite structure provides both high heat resistance (Tg ≥100°C) and improved mechanical flexibility, resolving the brittleness issue of fluorinated polyimides while maintaining optical transparency.
Solution Approach 2:
The invention introduces fluorinated aromatic groups at specific concentrations (0.1-5 mmol/g) to provide localized heat resistance and transparency enhancement, while the bulk polymer matrix maintains flexibility and mechanical toughness through aliphatic chain structures.
4Illumination intensity
If a silicone resin is used to achieve transparency and light resistance, then transparency and light resistance are improved, but reliability deteriorates due to large thermal expansion coefficient and gas permeability
Solution Approach 1:
The invention changes the chemical composition parameters by incorporating fluorinated aromatic epoxy structures that reduce thermal expansion coefficient and gas permeability compared to silicone resins, while maintaining excellent transparency and light resistance. The aromatic structures provide dimensional stability and barrier properties.
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 fluorinated aromatic compound enables the production of a cured product that is excellent in optical characteristics, heat resistance, and mechanical properties, making it suitable for use in optical members and as a crosslinking aid for fluorinated elastomers, improving both chemical and heat resistance.
Implementation Method 1
a step of subjecting an aromatic compound represented by the following formula (a1) and a fluorinated aromatic compound represented by the following formula (a2) to a condensation reaction in the presence of a HF elimination agent
Implementation Method 2
when heated or irradiated with light, it will be cured by a reaction of the crosslinkable functional groups one another
Data Source
AI summary
To provide a novel fluorinated aromatic compound having at least two carbon-carbon unsaturated bonds, a method for its production, a curable material comprising the fluorinated aromatic compound, a cured product thereof, and an optical member. The fluorinated aromatic compound is represented by formula (A), wherein n is an integer of 0 to 6, a is an integer of 0 to 5, b is an integer of 0 to 4, c is an integer of 0 to 4, a+c+n is 2 to 6, a+b is 2 to 9, Z is a single bond, —O—, —S—, —CO—, —C(CH3)2—, —C(CF3)2—, —SO—, or —SO2—, Rf1 is a C1-8 fluoroalkyl group, Y1 and Y2 are each independently a group represented by formula (1) (s is 0 or 1, and R1, R2, R3, and R4 are each independently a hydrogen atom or a fluorine atom), and F in the aromatic ring indicates that hydrogen atoms in the aromatic ring are all substituted by fluorine atoms.