The Application
Customer wants to build a special wafer carrier that has aluminum parts glued together. The carrier is eventually to be soaked in acetone.
Finding the Answers
- What temperature does the exposure to acetone take place?
- What is the duration of exposure and how many times does this exposure occur?
- Do you want low outgassing?
- What viscosity are you looking for?
The Solution
Making certain assumptions about the answers to the above questions, Venkat recommended EP41S-1.
EP41S-1 has outstanding chemical resistance. It was tested as a coating of about 0.020 inches thick on sand blasted steel. To optimize its chemical resistance, it was cured for 24 hours at room temperature followed by 2-3 hours at 200°F. The system was then immersed in a wide variety of chemicals including ethylene glycol, sodium hydroxide, toluene, gasoline, and more, for over 1 year. After 14 months, no failures were observed.
The operating temperature of EP41S-1 ranges from -60°F to +300°F. The viscosity of Part A is 10,000-15,000 and Part B is 250-400.
EP41S-1 also comes in a non-drip version, EP41S-1ND, and in a high temperature version, EP41S-1HT which is serviceable up to 400°F.
Summary of Products
| Product | Chemistry | Viscosity | Service Temperature Range |
|---|---|---|---|
| EP41S-1 | Two part epoxy | Low | -60°F to +300°F |
| EP41S-1ND | Two part epoxy | Non-drip | -60°F to +300°F |
| EP41S-1HT | Two part epoxy | Moderate | -60°F to +400°F |
| EP62-1 | Two part epoxy | Low | -60°F to +450°F |
| EP21ARHT | Two part epoxy | Moderate | -60°F to +400°F |
| EP21ARHTND | Two part epoxy | Non-drip | -60°F to +400°F |
| EP42HT-2 | Two part epoxy | Low | -60°F to +450°F |
Meet Our Tech Expert: Venkat Nandivada
Venkat Nandivada has been the Manager of Technical Sales at Master Bond Inc since 2010. He has a Masters degree in Chemical Engineering from Carnegie Mellon University. His hobbies include table tennis, cricket and soccer.
