Two-part epoxy adhesive with acid resistance that acts as an electrical insulator introduced by Master Bond
HACKENSACK, N.J. – Master Bond Inc. in Hackensack, N.J., is introducing the EP21ARHTND-2 two-part epoxy adhesive that will withstand prolonged exposure to a wide range of chemicals.
The EP21ARHTND-2 two-part epoxy adhesive is a reliable electrical insulator with a volume resistivity greater than 1014 ohm-cm at 75 F, and dielectric strength of 440 volts/mil at 75 F for a 1/8-inch test specimen.
The system's chemical resistance was tested in chemicals such as 98 percent sulfuric acid, 25 percent hydrochloric acid, 20 percent phosphoric acid, and 15 percent nitric acid, by soaking cured samples for more than 12 months, says Rohit Ramnath, senior product engineer at Master Bond.
The EP21ARHTND-2 also passes the damp heat reliability testing by withstanding 1000 hours of 85 degrees Celsius and 85 percent relative humidity.
Other noteworthy properties include a tensile strength of 9,000-10,000 psi, and a Shore D hardness of 75-85. The adhesive provides good heat resistance and is serviceable from -60 F to 400 F.
Although EP21ARHTND-2 can cure at room temperature, a cure schedule of overnight at ambient temperatures, followed by a heat cure of 150 to 200 degrees Fahrenheit for two to four hours or longer is typically recommended to optimize its acid resistance.
Related: Non-Drip Epoxy Features Acid Resistance
EP21ARHTND-2 does not contain solvents and is RoHS compliant. The product bonds well to metals, ceramics, composites, rubbers, and plastics.
It features a smooth paste-like consistency and will not flow or sag once applied, so it is suitable for bonding and sealing. It comes in half-pint, pint, quart, and gallon containers.
For more information contact Master Bond online at www.masterbond.com.
