Two-Component Epoxy Adhesive High Elongation
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Solution Overview
Problem
Conventional two-component epoxy adhesive compositions face limitations in mechanical strength, particularly in high elongation requirements for harsh environments like machines and aircraft, due to inherent limitations in adhesive force realization during storage and curing processes.
Innovation Solution
A two-component epoxy adhesive composition comprising a diglycidyl ether-based compound, such as bisphenol-derived and chain diol-derived diglycidyl ethers, combined with a polyether amine, which forms a cross-link reaction to enhance mechanical strength and achieve high elongation when mixed with a curing agent, specifically with a ratio of bisphenol A-derived diglycidyl ether to 1,6-hexene diol-derived diglycidyl ether in the range of 2:1 to 5:1.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesive compositions are used to achieve adhesion through contact with air or drying, then the adhesive force is limited, but the loss of adhesive strength during storage is significant
Solution Approach 1:
The adhesive composition is divided into two separate components: a resin part containing epoxy resin and a curing agent part containing amine-based compound. This segmentation prevents the curing reaction from occurring during storage, maintaining adhesive strength stability, while enabling strong adhesion when the components are mixed and applied.
Solution Approach 2:
The resin and curing agent are prepared separately in advance and stored independently. The curing reaction is postponed until the moment of application when the two components are mixed, ensuring that the adhesive maintains its full strength potential both during storage and after curing.
2Strength
If two-component epoxy adhesive composition is used to achieve strong adhesive force through chemical curing reaction, then the adhesive force is strong, but the elongation is limited in harsh environments
Solution Approach 1:
The patent modifies the chemical parameters of the curing agent by selecting specific amine-based compounds with particular molecular structures and functionalities. This changes the curing reaction characteristics to produce an adhesive with both high strength and high elongation, achieving over 100% elongation while maintaining strong adhesion in harsh environments.
Solution Approach 2:
The adhesive forms a composite structure through the chemical reaction between epoxy resin and amine-based curing agent, creating a cross-linked polymer network that combines the strength of epoxy with the flexibility provided by the amine structure, resulting in material with both high strength and high elongation.
3Strength
If high mechanical strength is required for harsh environments such as machines, automobiles, or aircraft, then the elongation should be high, but conventional compositions cannot achieve both high strength and high elongation
Solution Approach 1:
The patent changes the molecular parameters of the curing agent to achieve optimal balance between strength and elongation. By selecting amine-based compounds with specific structural parameters, the adhesive achieves both high mechanical strength for harsh environments and high elongation of over 100% for reliability.
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 elongation of 3% or larger, up to 10% or more, significantly improving mechanical strength and durability in harsh environments by initiating adhesive force only during the adhesion process, minimizing strength loss during storage.
Implementation Method 1
when the resin part and the curing agent part are mixed with each other, a curing reaction that realizes adhesion is initiated
Implementation Method 2
the amine-based compound may include polyether amine... forms a cross-link reaction to enhance mechanical strength and achieve high elongation
Data Source
Figure 1
AI summary
Disclosed are an epoxy-based composition having high elongation and a two-component epoxy adhesive composition comprising the same. The epoxy-based composition comprises a diglycidyl ether-based compound; and an amine-based compound, wherein the amine-based compound includes polyether amine. The two-component epoxy adhesive composition includes a resin part; and a curing agent part, wherein the resin part contains the epoxy-based composition.