Adhesive-Layer Adherend Composition for High-Temperature Storage Stability
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Solution Overview
Problem
Existing adherends with adhesive layers face issues of poor storage stability and increased stickiness at high temperatures, leading to bonding and reduced adhesiveness, especially when using epoxy resin compositions with lower melting points.
Innovation Solution
An adherend with an adhesive layer formed from an uncured curable resin composition comprising a crystalline epoxy resin with a melting point of 90°C or higher and a curing agent that is solid at 25°C, maintaining a solid state at room temperature to enhance storage stability and suppress stickiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an epoxy resin composition with a lower melting point is used, then the adhesive layer becomes easier to apply and bond, but the storage stability deteriorates and stickiness increases at high temperatures
Solution Approach 1:
The patent changes the melting point parameter of the epoxy resin to 90°C or higher, which fundamentally alters the storage stability and temperature resistance characteristics of the adhesive layer, resolving the contradiction between ease of application and storage stability
Solution Approach 2:
The patent creates a composite resin composition containing specific components (epoxy resin, curing agent, and optional additives) that work together to achieve both high melting point stability and adequate bonding performance, balancing the contradictory requirements
2Productivity
If an epoxy resin composition with a lower melting point is used, then the adhesive layer becomes easier to bond, but stickiness increases at high temperatures causing unwanted bonding
Solution Approach 1:
By setting the melting point parameter to 90°C or higher, the patent eliminates excessive stickiness at high temperatures while maintaining bonding efficiency through controlled curing, directly resolving the contradiction between productivity and harmful stickiness
Solution Approach 2:
The patent converts the potential harmful effect of high-temperature stickiness into a beneficial controlled curing process, where the adhesive remains stable during storage and handling but bonds effectively when intended, turning a harmful factor into a process advantage
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 solution provides improved storage stability and reduced stickiness, enabling efficient handling and bonding at high temperatures without separate adhesives, enhancing productivity and applicability to various structures.
Implementation Method 1
an epoxy resin having a melting point of 90° C. or higher
Data Source
AI summary
An adherend with an adhesive layer includes an adherend that is composed of a metal material or a resin material, and an adhesive layer that is laminated on a surface of the adherend and formed from an uncured curable resin composition that is in a solid state at room temperature. The curable resin composition includes (A) an epoxy resin having a melting point of 90° C. or higher, and (B) a curing agent that is a solid at 25° C.