Master Bond - EP31 Epoxy Adhesive For Structural Bonding Featuring Extraordinarily High Shear & Peel Strengths - Master Bond - #1

Master Bond Polymer System EP31 is a two component room temperature curing epoxy for high performance structural bonding applications featuring lap shear strengths exceeding 4500 psi. In addition, unlike many structural epoxies, EP31 also has a high peel strength exceeding 40 pli. The service temperature range of the EP31 is -60 to +250°F (-50°C to 120°C). It combines low shrinkage upon cure along with excellent resistance to many chemicals, including water, oils and fuels. EP31 has good adhesion to a wide variety of substrates including many metals, plastics, rubbers, ceramics, and glass. The optically clear EP31 is also available in a full range of colors. The cured adhesive is a superb electrical insulator. The EP31 system is also available in a non-drip version called EP31ND.

• Easily processed; convenient 3 to 1 mix ratio by weight.

• Contains no solvents or volatiles.

• Versatile cure schedule; cures at room temperature or more quickly at elevated temperatures.

• Exceptionally high tensile shear and peel strength.

• Excellent chemical resistance and electrical properties.

• Low shrinkage upon cure.

• Low elongation, high modulus.

• Available optically clear and in a variety of colors.

Mixing ratio, by weight, part A to B............................................................................................100/30

Viscosity, part A, 75°F, cps............................................................................................ 10,000-12,000

Viscosity, part B, 75°F, cps..............................................................................................................100

Viscosity, mixed compound, 75°F, cps...............................................................................2,000-3,000

Working life after mixing, 75°F

100 gram mass, minutes ................................................................................................50-60

200 gram mass, minutes ................................................................................................40-50

Cure schedule

75°F (25°C), 90% maximum strength developed within........................................24-36 hours

150°F (66°C), 90% maximum strength developed within..........................................2-3 hours

Tensile strength, 75°F, psi..........................................................................................................>4600

Tensile modulus, 75°F, psi.......................................................................................................410,000

Flexural strength, 75°F, psi.........................................................................................................13,200

Bond strength, shear, aluminum/aluminum

Room temperature cure, 75°F, psi ...................................................................................4600

After 30 days water absorption, 75°F, psi......................................................................>4500

T-peel, aluminum to aluminum, 75°F, pli.........................................................................................>40

Volume resistivity, 75°F, ohm-cm...........................................................................................1.5 x 10¹⁴

Dielectric constant, 75°F, 100 KHz.................................................................................................3.94

1 MHz..................................................................................................3.83

Dissipation factor, 100 KHz..........................................................................................................0.050

Service temperature range, °F (°C)...............................................................-60 to 250 (-50 to 120°C)

Shelf life at 75°F, in unopened containers .................................................................................. 1 year

Parts A and B available in pint, quart, 1 (one) gallon and 5 (five) gallon containers.

Adhesives, Sealants & Coatings • 154 Hobart Street • Hackensack, NJ 07601-3922 • Tel: 201-343-8983

Internet Address: http://www.masterbond.com - 1 -