Temperature Resistance
What is temperature resistance?
Temperature resistance describes the ability of adhesives to permanently maintain their mechanical and chemical properties over a defined temperature range. This property is crucial for applications exposed to extreme temperatures, temperature fluctuations, or thermal cycles. Temperature resistance also indicates the maximum temperature, in degrees Celsius or Fahrenheit, at which a bond can be subjected to stress.
Temperature ranges of adhesives
- Standard applications: -40°C to +80°C for general industrial applications
- Extended ranges: -55°C to +150°C for automotive applications
- High temperature: +150°C to +250°C for engine-close applications
- Extreme temperatures: Over +300°C for special applications
- Low temperature: Down to -196°C for cryogenic applications
Factors of temperature resistance
- Glass transition temperature: Critical point for stiffness change
- Decomposition temperature: Upper limit for permanent resistance
- Thermal expansion: Stresses due to different expansion coefficients
- Oxidation resistance: Aging through oxygen at high temperatures
- Crystallinity: Influence on thermal properties
High-temperature resistant adhesive systems
- Methacrylate adhesives: Up to +200°C with fast curing and high strength
- Epoxy Resin Adhesives: Over +200°C, ideal for dynamic loads
- Epoxy Resin Adhesives with Anhydride Hardeners: Extremely resistant to aggressive chemicals
Testing methods
- Short-term testing: Strength measurement at defined temperature
- Long-term testing: Creep resistance over weeks or months
- Temperature cycling: Cyclic loading between extreme temperatures
- Thermogravimetric analysis: Weight loss with increasing temperature
Application areas
- Automotive: Engine-close bonding, exhaust systems
- Aerospace: Engine components, heat shields
- Electronics: Power semiconductors, LED modules
- Industrial furnaces: Linings and seals
- Energy technology: Solar cells, power plant components
DELO Temperature-Resistant Adhesives
- High-temperature systems for extreme applications
- Qualified materials according to automotive standards
- Long-term tests for creep resistance
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