Silane-Based Adhesive for Silicone Rubber Bonding
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Solution Overview
Problem
Conventional adhesive methods for bonding silicone rubber to substrates like metal, polymer resin, or ceramics face challenges such as weak adhesive strength, difficulty in adhering small materials, and instability due to poor reactivity and interaction at the interface, along with issues related to stress concentration and detachment.
Innovation Solution
A base material with a surface treated to form a silyl-ether-linkage using active silyl groups from alkoxysilane compounds, which creates a monomolecular layer for strong adhesion, allowing for the use of a thin, chemically stable adhesive layer that interacts effectively with silicone rubber, using hydroxyl groups generated by corona discharge, atmospheric-pressure plasma, or ultraviolet irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a thick adhesive layer is used to disperse stress, then stress dispersion is improved, but strain concentration occurs due to stress causing detachment and adhesive strength decreases
Solution Approach 1:
The invention changes the chemical composition and molecular structure parameters of the adhesive material by incorporating specific silane compounds and crosslinking agents, transforming the adhesive from a conventional polymer-based material to a chemically reactive silane-based system that can form strong covalent bonds with both the substrate and silicone rubber, thereby achieving high adhesive strength with minimal thickness
Solution Approach 2:
The invention creates a composite adhesive system combining silane compounds, crosslinking agents, and catalysts that work synergistically to form a multi-functional adhesive layer capable of both stress dispersion and strong chemical bonding, effectively resolving the contradiction between thickness and strength
2Strength
If the adhesive layer is made thin to avoid strain concentration, then adhesive strength is improved, but stress dispersion capability is reduced
Solution Approach 1:
The invention modifies the rheological and mechanical parameters of the adhesive material through chemical composition control, creating a viscoelastic material that can effectively disperse stress even at minimal thickness while maintaining high bond strength through chemical crosslinking
3Ease of manufacture
If conventional adhesive materials are used, then ease of manufacture is improved, but adhesive strength and reactivity with silicone rubber are poor
Solution Approach 1:
The invention changes the chemical parameters of the adhesive material from conventional polymer-based compositions to silane-based compositions with specific functional groups that exhibit high reactivity with silicone rubber, achieving superior adhesive strength while maintaining compatibility with existing manufacturing processes
Solution Approach 2:
The invention develops a composite adhesive formulation integrating silane compounds, crosslinking agents, and catalysts that work together to provide both ease of application and exceptional adhesive performance, resolving the contradiction between manufacturing simplicity and bond strength
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 a strong, stable adhesive bond that resists peeling and bending without a thick adhesive layer, ensuring long-term durability and efficient stress distribution, even for small materials, by forming a robust interface through cross-linkage with silicone rubber.
Implementation Method 1
hydroxyl groups generated by corona discharge, atmospheric-pressure plasma, or ultraviolet irradiation
Implementation Method 2
hydroxyl groups generated by corona discharge, atmospheric-pressure plasma, or ultraviolet irradiation
Implementation Method 3
hydroxyl groups generated by corona discharge, atmospheric-pressure plasma, or ultraviolet irradiation
Implementation Method 4
a surface treated to form a silyl-ether-linkage using active silyl groups from alkoxysilane compounds
Implementation Method 5
creates a monomolecular layer for strong adhesion
Implementation Method 6
forming a robust interface through cross-linkage with silicone rubber
Data Source
AI summary
A base material for adhesion to be adhered to a solid body comprising;a substrate made from metal, polymer resin, glass or ceramics whose surface is adhesive to the solid body by silyl-ether-linkage that at least one active silyl group selected from the group consisting of a hydrosilyl-containing silyl group, a vinyl-containing silyl group, an alkoxysilyl-containing silyl group and a hydrolytic group-containing silyl group having reactivity with a reactive group on the surface of the solid body is bound to a dehydrogenated residue of hydroxyl group on the surface of the substrate.