Two-Component Epoxy Resin Composition for Fast Room Temperature Curing
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Solution Overview
Problem
Existing two-component epoxy resin compositions face challenges in achieving fast curability at room temperature while maintaining a high glass transition temperature, particularly with mercaptan-based systems which often have limited applications due to low glass transition temperatures.
Innovation Solution
A two-component curable composition comprising a first component with 20 wt.% or more bisphenol A epoxy resin and 5 wt.% or more multifunctional epoxy resin, and a second component with 80 wt.% or more poly mercaptoalkyl glycoluril compound and 0.5 wt.% to 20 wt.% accelerator, allowing for rapid curing and high glass transition temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mercaptan-based epoxy compositions are used for fast curing, then curing speed is improved, but glass transition temperature decreases to around room temperature
Solution Approach 1:
The invention changes the chemical composition parameters by using a specific ratio of bisphenol A epoxy resin (20-80 wt%) to multifunctional epoxy resin (5-80 wt%), combined with poly mercaptoalkyl glycoluril compound (80-95 wt%) and accelerator (5-20 wt%). This parameter optimization achieves both fast curing and high glass transition temperature of 80°C or higher
Solution Approach 2:
The invention creates a composite epoxy system by combining two different epoxy resin types (bisphenol A and multifunctional) with a specific curing agent (poly mercaptoalkyl glycoluril) and accelerator. This composite approach allows the system to exhibit both fast curing characteristics and high glass transition temperature, resolving the contradiction between curing speed and thermal performance
2Temperature
If amine-based two component epoxy compositions are used, then room temperature curing is achieved, but curing time increases to several days
Solution Approach 1:
The invention introduces an accelerator (0.5-20 wt%, preferably 5-15 wt%) as an intermediary substance that mediates between the epoxy resin and poly mercaptoalkyl glycoluril compound. This accelerator enables the system to cure at room temperature with dramatically reduced curing time (gel time of 5-60 minutes), resolving the contradiction between low-temperature curing and curing speed
Solution Approach 2:
By changing the curing agent from traditional amine-based systems to poly mercaptoalkyl glycoluril compound combined with an accelerator, the invention achieves room temperature curing with reduced curing time. The specific chemical composition parameters enable both low-temperature reactivity and fast curing kinetics
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 fast curing at room temperature with a high glass transition temperature, suitable for various applications such as adhesives, coatings, and composite materials, including semiconductor and glass bonding.
Implementation Method 1
Epoxy resins can react fast with liquid curing agents
Implementation Method 2
They can cure much faster
Data Source
AI summary
The present invention relates to a room temperature fast curable two-component (2K) curable composition comprising a first component being an epoxy resin part and comprising two distinguishing epoxy resins; and a second component being a curing agent part and comprising a poly mercaptoalkyl glycoluril compound, and an accelerator. Further, the present invention relates to a cured product obtained from the two-component (2K) curable composition according to the invention and the cured product's use.