Composite Adhesive Composition for Metal and Organic Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional adhesives, such as epoxy resins, face challenges in maintaining adhesive strength and water resistance, especially in high temperature hydrothermal environments, and struggle with bonding materials like aluminum and FRPs, which are increasingly used in lightweight vehicle construction.
Innovation Solution
A composite adhesive composition combining bisphenol bifunctional epoxy resin, epoxy resin with trifunctionality or higher functionality, epoxy modified silicone resin, and acrylic resin, along with a curing agent, to create an adhesive sheet that maintains strength and stability across temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thermoplastic resin is added to epoxy adhesive to improve flexibility, then toughness is improved, but heat resistance and water resistance are impaired
Solution Approach 1:
The patent uses a composite adhesive system combining epoxy resin with a thermoplastic resin blend consisting of polyolefin and polyacrylic acid. This composite approach allows the epoxy matrix to provide heat and water resistance while the thermoplastic blend contributes toughness and flexibility, resolving the contradiction between mechanical performance and environmental stability.
Solution Approach 2:
The patent specifies precise compositional parameters for the thermoplastic resin blend (polyolefin 30-70 wt%, polyacrylic acid 30-70 wt%) to optimize the balance between toughness and environmental resistance. By controlling the ratio and molecular weight parameters of the blend components, the adhesive achieves both improved flexibility and maintained heat/water resistance.
2Strength
If epoxy resin is used to achieve high mechanical strength and bonding capability, then adhesive strength is improved, but brittleness increases leading to fracture in high-temperature environments
Solution Approach 1:
The patent creates a composite adhesive system where epoxy resin provides high mechanical strength and bonding capability, while the added thermoplastic resin blend (polyolefin/polyacrylic acid) provides toughness and fracture resistance. This composite structure eliminates brittleness while maintaining strong adhesion to metals and organic materials.
3Adaptability or versatility
If conventional adhesives are used to bond lightweight materials (aluminum, FRP), then bonding is achieved, but adhesion strength deteriorates in high-temperature hydrothermal environments
Solution Approach 1:
The patent optimizes the adhesive composition parameters including epoxy resin molecular weight (300-1000), thermoplastic resin blend ratio (polyolefin 30-70%, polyacrylic acid 30-70%), and total thermoplastic content (10-40 parts per 100 parts epoxy resin). These parameter adjustments ensure strong adhesion to lightweight materials like aluminum and FRP while maintaining stability in high-temperature hydrothermal conditions.
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 adhesive composition exhibits excellent storage stability and maintains strong adhesion between metals and organic materials, even in high temperature hydrothermal environments, while preventing water intrusion and maintaining mechanical strength.
Implementation Method 1
an adhesive composition that enables adhesion between metals, between a metal and an organic material, and between an organic material and an organic material
Implementation Method 2
the resin has poor toughness, and, in cases where an epoxy adhesive is used for a use such as an aircraft or an automobile, the problem of a decrease in the bonding strength sometimes occurs due to brittle fracture
Data Source
AI summary
An adhesive composition that enables adhesion between metals, between a metal and an organic material, and between an organic material and an organic material, have at the same time an excellent storage stability, and are capable of maintaining an excellent adhesive strength even in a high temperature hydrothermal environment, is provided. The adhesive composition according to the present invention comprises an epoxy resin, an epoxy modified silicone resin, an acrylic resin, and a curing agent, the above-mentioned epoxy resin comprising a bisphenol bifunctional epoxy resin and an epoxy resin with trifunctionality or higher functionality, and the above acrylic resin comprising a binary copolymer of methyl methacrylate-butyl acrylate-methyl methacrylate or a modified product thereof.