Water-Based Adhesive for High-Temperature Insulation Bonding
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Solution Overview
Problem
Current adhesives for high-temperature insulating materials, such as those used in engine compartments and exhaust systems, lack sufficient heat resistance and are often combustible, with existing silicone adhesives limited to service temperatures around 180° C to 210° C and requiring pre-treatment of substrates, leading to increased costs.
Innovation Solution
A water-based adhesive comprising a dispersed polymer and an emulsified silicone resin polymer, which is heat-sealable and non-combustible, providing strong adhesion at high temperatures and resistance to solvents, oils, and acids, with a low solvent content for environmental and occupational benefits, and capable of bonding various substrates including metal and glass fibers without pre-coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If silicone adhesives are used for high-temperature bonding, then heat resistance is improved, but service temperature is limited to around 180°C to 210°C and substrate pre-treatment is required
Solution Approach 1:
The invention combines polyorganosiloxane (providing heat resistance) with a dispersed polymer (providing adhesion and penetration capability) to create a composite adhesive system. This composite approach allows the adhesive to bond substrates like glass fiber mat and aluminum foil without pre-treatment while maintaining service temperatures above 350°C.
Solution Approach 2:
The invention changes the physical parameters of the adhesive system by using a one-component formulation that remains fluid at application temperature, allowing deep penetration into fabric substrates. The adhesive then cures in-situ to form a heat-resistant bond, eliminating the need for substrate pre-treatment while achieving superior temperature resistance.
2Stability of the object's composition
If one-component silicone elastomer composition is used, then long-term stability at moderate temperatures is improved, but viscosity is high and penetration ability is poor
Solution Approach 1:
The invention modifies the viscosity parameter of the adhesive by formulating a one-component system with dispersed polymer and solvent that remains fluid at application temperature. This low-viscosity state enables deep penetration into fabric substrates, while subsequent curing transforms it into a stable, heat-resistant bond capable of withstanding temperatures above 350°C.
Solution Approach 2:
The adhesive exhibits dynamic behavior, transitioning from a fluid state during application (enabling penetration) to a cured solid state after bonding (providing stability). This dynamic property allows the same material to satisfy both penetration requirements during application and long-term stability requirements during service.
3Strength
If heat-sealable adhesives composed of thermoplastic polymer are used, then adhesion at room temperature is improved, but heat resistance is insufficient and substrates part when exposed to heat
Solution Approach 1:
The invention creates a composite adhesive system combining polyorganosiloxane (providing heat resistance above 350°C) with dispersed polymer (providing adhesion). This composite formulation maintains strong bonding strength at room temperature while simultaneously providing exceptional heat resistance, preventing substrate delamination even at elevated temperatures.
4Temperature
If water-based adhesive with dispersed polymer and emulsified silicone resin polymer is used, then heat resistance and non-combustibility are improved, but adhesion strength may be reduced
Solution Approach 1:
The invention optimizes the formulation parameters by carefully selecting the ratio of polyorganosiloxane to dispersed polymer, adjusting solids content and solvent composition. These parameter adjustments ensure the adhesive achieves both exceptional heat resistance (service temperature above 350°C) and strong adhesion to substrates like glass fiber mat and aluminum foil.
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 maintains flexibility and heat resistance, reducing material costs and preventing engine damage or fires by ensuring durable bonding of insulating materials at high temperatures, with improved handling and environmental impact.
Implementation Method 1
a water-based adhesive which comprises a dispersed polymer and an emulsified silicone resin polymer
Implementation Method 2
an adhesive which adheres well at high temperatures, is not combustible
Data Source
AI summary
A water-based adhesive which comprises a dispersed polymer and an emulsified silicone resin polymer. The adhesive is postcrosslinkable via reactive groups.