Master Bond EP126 is a specialty type two part epoxy that excels in high temperature applications up to +600°F. It has an impressive glass transition temperature of 160 to 180°C. EP126 has slightly different handling properties when compared to other epoxies, but ultimately, is easily processable. With this compound, Part A is a moderate viscosity liquid and Part B is a powder. First, Part A is heated to 150-160°F, and then appropriate amount of Part B, based on a forgiving 100 to 50 mix ratio by weight, is added and stirred. The mixed system is a malleable paste, with an exceedingly long open time, that can be easily applied to the substrates. The curing is straightforward; 3-4 hours at 300°F or 2-3 hours at 350°F. For optimum properties, post curing for 12-24 hours at 400-450°F is recommended.
EP126 bonds well to a wide variety of substrates, including metals, composites, glass, ceramics, rubbers and many plastics. Additionally, it is formulated as a toughened system allowing it to withstand rigorous thermal cycling. The epoxy system offers enhanced tensile lap shear strength, fine dimensional stability, strikingly high compressive strength along with low shrinkage upon curing. EP126 is a very good electrical insulator, especially as it retains highly insulative properties at elevated temperatures. Furthermore, it has superb chemical resistance to water, oils, acids, bases and many solvents. EP126 should be considered for the most demanding electronic aerospace, optical and OEM applications based on this solid performance profile.
Product Advantages
- Excellent long-term thermal stability
- Dimensionally stable and machineable
- 100% reactive—no solvents or other volatiles
- High adhesion to metallic and non-metallic substrates
- Robust physical strength profile especially in the compressive mode
