Crosslinked Acrylic Adhesive for High-Temperature Bonding Strength
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Solution Overview
Problem
Existing acrylic adhesives used in new energy vehicles face limitations in high-temperature resistance and viscosity, leading to issues such as component detachment and poor bonding performance under harsh environmental conditions.
Innovation Solution
A high viscosity acrylic adhesive is formulated using a cross-linked modified monomer with active unsaturated vinyl substituents, combined with acrylic resin polymer, defoaming agent, anti-aging agent, and reinforcing agent, to enhance bonding strength and high-temperature resistance through cycloaddition reactions and increased crosslinking density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acrylic resin adhesive is used to bond various materials, then bonding performance and weather resistance are improved, but high-temperature resistance is insufficient
Solution Approach 1:
The patent uses composite materials by combining acrylic resin polymer with cross-linked modified monomers containing silicon oxygen bonds and benzene ring structures. These cross-linked structures create a composite adhesive system that maintains bonding performance while significantly improving high-temperature resistance through the thermal stability of the cross-linked network.
Solution Approach 2:
The patent changes the chemical structure parameters of the adhesive by introducing cross-linked modified monomers with specific functional groups (silicon oxygen bonds, benzene rings). This structural parameter change enables the adhesive to maintain its bonding properties while achieving superior high-temperature resistance.
2Strength
If epoxy adhesive is used for bonding, then bonding strength is improved, but internal stress increases causing component detachment
Solution Approach 1:
The patent applies local quality by creating a adhesive formulation where cross-linked structures are distributed throughout the matrix, providing localized stress relaxation zones. The cross-linked modified monomers create a network structure that maintains overall bonding strength while locally reducing internal stress concentrations that would otherwise cause component detachment.
3Ease of operation
If acrylic resin adhesive viscosity is reduced for ease of application, then application performance is improved, but high-temperature stability deteriorates
Solution Approach 1:
The patent changes the viscosity parameter by selecting appropriate acrylic resin polymers and cross-linked modified monomers that provide optimal flow characteristics for application. Simultaneously, the cross-linked structure ensures high-temperature stability is maintained, achieving a balance between application performance and thermal stability through controlled parameter selection.
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 exhibits improved bonding performance and high-temperature resistance, maintaining structural integrity and adhesive properties under extreme conditions.
Implementation Method 1
the principle of cycloaddition reaction between the active substituted hydroxyl and epoxy groups can be utilized under the catalysis of phase transfer catalyst
Implementation Method 2
maintain high viscosity. However, the heat resistance of acrylic resin adhesives is relatively limited, and there are also defects in practical applications. Therefore, it is of great significance to prepare acrylic resin adhesives with high viscosity and excellent high-temperature resistance
Data Source
AI summary
A high viscosity acrylic adhesive is provided, which is composed of acrylic resin polymer as a raw material, mixed with a defoaming agent, an anti-aging agent, etc. By preparing a cross-linked modified monomer containing multiple unsaturated vinyl substituents for acrylic resin polymer, a cross-linked network-like structure of acrylic resin polymer can be obtained. The cross-linked structure of acrylic resin polymer has higher internal stress and can exhibit better bonding performance. The cross-linked modified monomer structure contains many ether bonds generated by cycloaddition reaction, which can form hydrogen bonds with a substrate to enhance the bonding performance of the adhesive. The increase in crosslinking density can hinder the movement of the molecular chains of acrylic resin itself, and the rigid benzene ring structure and high bond energy silicon oxygen bonds in the crosslinked modified monomer structure can synergistically enhance the high-temperature resistance of the adhesive.