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Epoxy Touts Strength in Acid Immersion

Wednesday, March 2, 2011

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Master Bond Inc. has developed a two-component epoxy resin compound for coatings, liners and adhesive/sealants that require significant acid and chemical resistance.

The company says its new EP21AR Polymer System can withstand immersion in 96-98% sulfuric acid and 36% hydrochloric acid for more than a year.

Master Bond

The compound cures at room temperature or more rapidly at higher temperatures. The two-component product, with a 2-to-1 non-critical mix ratio by weight, offers an “unmatched” degree of acid resistance for a resin composition, the manufacturer says.

A primary application would be as a coating and/or liner for chemical storage tanks, fuel storage tanks, chemical piping, scrubbers and chemical processing equipment. The EP21AR system resists fuels, oils, ethanol and many active organic solvents, the manufacturer said. Its bonding strength also makes it suitable for adhesive applications, especially in acid environments.

Product Features and Specs

Master Bond Polymer System EP21AR is 100% reactive, contains no solvents or diluents, and cures with minimal shrinkage, according to the manufacturer. It develops a bonding strength of more than 2500 psi at room temperature and can adhere to metals, glass, ceramics, cements, wood, vulcanized rubbers and many plastics. The epoxy has a working life of 45 to 55 minutes at ambient temperature; a non-drip version is also available.

Although rigid after curing, the product thermally cycles well over the temperature range -60 to 275°F, Master Bond says.

The compound can be applied in any thickness and, when cured, produces a strong, thermoset plastic with electrical insulation characteristics and low coefficient of thermal expansion, the company says.

Master Bond formulates epoxy, polyurethane, polysulfide, silicone and UV cure systems for resistance to corrosive environments.  These compounds are available in different viscosities, cure times, hardness, electrical properties, colors, and temperature resistance for various performance requirements.

More information: www.masterbond.com.

   

Tagged categories: Adhesive; Epoxy; Linings; Protective coatings; Sealers; Two-component coatings

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