EP42HT-2FG Black, a newly introduced epoxy by Master Bond, is a two part, moderate heat cured epoxy with high temperature resistance that complies with FDA 21 CFR 175.105 for indirect food contact applications.
The epoxy withstands exposure to a wide range of harsh chemicals, including acids, bases, and solvents. It also possesses good flow properties and can be employed for bonding, sealing, potting, and casting in food grade applications.
This compound has a relatively long working life of 105 – 150 minutes for 100g of the mixed material at 75°F (23.9°C). The colour of part A is black, and part B is light amber, with a mix ratio of 100 to 30 by weight. EP42HT-2FG Black cures optically opaque, and the recommended cure schedule is overnight at room temperature, followed by a heat cure at 150°F – 250°F (65.6°C – 121.1°C) for three to four hours.
This thermally stable system offers a glass transition temperature of 145°C – 150°C and is serviceable over a wide temperature range from -60°F – 450°F (-51.1°C – 232.2°C). It has a high tensile strength of 11,000 psi – 12,000 psi at room temperature and a tensile modulus of 400,000 psi – 450,000 psi. It is electrically insulative with a volume resistivity greater than 1014 ohm-cm and a dielectric constant of 4.6 at 60 Hz, at room temperature. These attributes make EP42HT-2FG Black suitable for potting and encapsulation type applications.
Master Bond recommends this system for indirect food applications, particularly where the surrounding environment may be exposed to aggressive chemical washdowns or antibacterial agents. It is available in 1/2 pint, pint, quart, and gallon kits. Specialty packaging is also available in premixed and frozen syringes.
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