Liquid 1K Epoxy Resin Composition with Phosphonium Ionic Liquid Catalyst
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Solution Overview
Problem
Existing one-component epoxy resin compositions face challenges with high reactivity and short pot life, requiring mixing of two components and high curing temperatures, which complicates handling and application, especially in electronic material applications.
Innovation Solution
A liquid one-component (1K) epoxy resin composition comprising 20-80 wt.% liquid epoxy resin, 20-60 wt.% liquid phenol resin, and 0.1-15 wt.% phosphonium-based ionic liquid, allowing the composition to remain in a stable liquid state at room temperature with extended pot life and low curing temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a one-component epoxy resin composition is prepared with high reactivity, then curing speed is improved, but pot life becomes too short for easy handling
Solution Approach 1:
The patent changes the chemical parameters by introducing a phosphonium-based ionic liquid catalyst and optimizing the ratio of liquid epoxy resin to liquid phenol resin. This creates a balanced system where the ionic liquid provides controlled catalytic activity, achieving both adequate curing speed and extended pot life at room temperature, resolving the contradiction between fast curing and long usability.
2Device complexity
If a solid curing agent is used to achieve one-component composition, then mixing complexity is reduced, but curing temperature becomes too high
Solution Approach 1:
The patent changes the physical state parameter of the curing agent from solid to liquid (using liquid phenol resin), and introduces a phosphonium-based ionic liquid catalyst. This combination allows the system to cure at low temperatures (room temperature) while maintaining one-component simplicity, eliminating both high curing temperature and mixing complexity issues.
Solution Approach 2:
The phosphonium-based ionic liquid acts as an intermediary catalyst that enables the liquid phenol resin to react with the liquid epoxy resin at low temperatures. This intermediary substance facilitates the curing reaction without requiring high temperatures or complex mixing procedures, achieving both simplicity and low-temperature curing.
3Duration of action of moving object
If liquid curing agents are used to extend pot life, then handling time is improved, but reactivity and stability deteriorate
Solution Approach 1:
The patent creates a composite system combining liquid epoxy resin, liquid phenol resin, and phosphonium-based ionic liquid in specific ratios. This composite formulation achieves synergistic effects where the liquid phenol resin extends pot life and the ionic liquid catalyst maintains curing stability, resolving the contradiction between long pot life and reliable curing performance.
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 stability, extended pot life, and low curing temperatures, enabling easy handling and efficient curing at room temperature, addressing the limitations of existing epoxy resin compositions.
Implementation Method 1
c) from 0.1 to 15 wt.% of at least one phosphonium-based ionic liquid
Data Source
AI summary
The present invention relates to a liquid one-component (1K) epoxy resin composition comprising a liquid epoxy resin, a liquid phenol resin and a phosphonium-based ionic liquid. Further, the present invention relates to a cured product obtained from the liquid one-component (1K) epoxy resin composition according to the invention and the cured product's use.