MATERIALS, ADHESIVES AND COATINGS
EP42HT-2, EP42HT-2LO, EP42HT-2LTE, EP42HT-2AO-1 Black chemical-resistant room-temperature-cure epoxies up to +232 °C
Country: · Model: EP42HT-2, EP42HT-2LO, EP42HT-2LTE, EP42HT-2AO-1 Black
Two-component epoxies that cure at room temperature and withstand up to +232 °C, with high chemical resistance. They are adhesives, sealants, coatings and casting compounds for repair and for assembling large or heat-sensitive parts. Versions with low outgassing, very low CTE and a thermally conductive black one are available.
- Type
- two-component epoxy, cures at room temperature
- Cure
- 48–72 h (EP42HT-2AO-1 3–5 days, 2LTE 4–7 days) at 24 °C or 2–3 h at 93 °C
- Operating temperature
- EP42HT-2 and -2LO −51…+232 °C; -2AO-1 Black from 4 K to +204 °C; -2LTE from 4 K to +149 °C
- Hardness
- > 75 … 95 Shore D
Technical specifications
| Type | two-component epoxy, cures at room temperature |
|---|---|
| Cure | 48–72 h (EP42HT-2AO-1 3–5 days, 2LTE 4–7 days) at 24 °C or 2–3 h at 93 °C |
| Operating temperature | EP42HT-2 and -2LO −51…+232 °C; -2AO-1 Black from 4 K to +204 °C; -2LTE from 4 K to +149 °C |
| Hardness | > 75 … 95 Shore D |
| CTE | EP42HT-2LTE 9–12·10⁻⁶ 1/°C; -2AO-1 Black 18–21·10⁻⁶ 1/°C |
| Dielectric constant | EP42HT-2 3.07 at 9.375 GHz |
| Refractive index | EP42HT-2 1.63 |
| Mix ratio | -2LTE and -2AO-1 100:40 by weight |
| Certifications | ASTM E595 for -2LO, -2LTE, -2AO-1 Black; 1000 h 85 °C/85 % RH |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
Base EP42HT-2 cures in 48–72 hours at room temperature or 2–3 hours at 93 °C, works from −51 to +232 °C, and has a dielectric constant of 3.07 at 9.375 GHz and a refractive index of 1.63. The EP42HT-2LO version with the same range meets ASTM E595, has a volume resistivity above 10¹⁴ Ω·cm and 80–90 Shore D. EP42HT-2LTE is a paste with a CTE of 9–12·10⁻⁶ 1/°C, close to metals and ceramics, a hardness of 85–95 Shore D and a range from 4 K to +149 °C. It is intended for precision optics where alignment stability matters. EP42HT-2AO-1 Black, the black thermally conductive electrically insulating version, has a CTE of 18–21·10⁻⁶ 1/°C and works from 4 K to +204 °C. All systems passed 1000 hours at 85 °C and 85 % humidity.
How to choose
Base EP42HT-2 suits cases that need +232 °C without hot curing. For NASA outgassing requirements take EP42HT-2LO, for precision optics with minimal thermal drift EP42HT-2LTE, and for heat removal from electronics EP42HT-2AO-1 Black. Allow for the cure time, since 2LTE needs 4–7 days and 2AO-1 3–5 days, while the base compound needs 48–72 hours at 24 °C. The ratio for 2LTE and 2AO-1 is 100:40 by weight.
Request a price and lead time
EP42HT-2, EP42HT-2LO, EP42HT-2LTE, EP42HT-2AO-1 Black chemical-resistant room-temperature-cure epoxies up to +232 °C. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What is the temperature range of EP42HT-2?
From −51 to +232 °C after curing at room temperature. For cold-cure systems this is unusually high.
What is the mix ratio of EP42HT-2LTE and 2AO-1?
100:40 by weight for both grades. Curing at 24 °C takes 4–7 days for 2LTE and 3–5 days for 2AO-1.
Can the cure of EP42HT-2 be accelerated?
Yes, by heating for 2–3 hours at 93 °C instead of 48–72 hours at room temperature.
What is the CTE of EP42HT-2LTE?
9–12·10⁻⁶ 1/°C, close to metals and ceramics. Hardness is 85–95 Shore D, and it meets ASTM E595.
What is the dielectric constant of EP42HT-2?
3.07 at 9.375 GHz. The refractive index is 1.63.
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