Low-Viscosity, Optically Clear Epoxy

Master Bond Inc.

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Master Bond has introduced EP37-3, a tough, optically clear, low-viscosity epoxy compound for high-performance casting, coating, bonding and sealing.

EP37-3 is a two-component formulation with a noncritical 2-to-1 mix ratio, weight or volume. The low-viscosity epoxy resin-based composition cures readily at ambient temperatures, or more quickly at elevated temperatures. The curing reaction generates very little heat, and the EP37-3 epoxy system can be used to prepare large-volume castings as well as small-volume pottings and encapsulations.

The cured epoxy compound exhibits high optical clarity and is quite tough, with attractive physical strength properties, Master Bond said. The company said the EP37-3 can be employed over a temperature range of -80°F to 250°F, is 100 percent reactive and does not contain any volatiles; it has excellent dimensional stability and exceptionally low shrinkage while curing.

The EP37-3 epoxy resin system offers superior adhesion to both metallic and nonmetallic substrates. The cured material features excellent long-term resistance to water, salts, many acids and bases as well as various organic solvents, the manufacturer said. It is suitable for coating and bonding applications where toughness, optical clarity and serviceability over a wide temperature range are required, and its low exotherm while curing makes it ideal for larger castings. It is available in pints, quarts, gallons and 5-gallon pails.

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Published: June 2006