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The Importance of Flame Retardant Epoxies Flame, Smoke & Toxicity Reference Standards ADHESIVES I SEALANTS I COATINGS Master Bond Inc. 154 Hobart Street, Hackensack, NJ 07601 USA Phone: +1.201.343.8983 | Fax +1.201.343.2132 | main@masterbond.com

EP90FR-V: Two part epoxy rated for FAR25.853(a), Vertical Burn, EP93FRHT: Two part epoxy rated for Airbus ABD003 Vertical Burn, Smoke, and Toxicity 17

Flame retardant epoxies play a critical role in applications and products where safety and reliability are paramount. From consumer electronics, appliances, electrical components, automobiles, and airplanes, flame retardant epoxies are critical for assuring the longevity and safety of the device or component in question. Master Bond offers a wide range of epoxy adhesives, sealants, and encapsulants that meet a variety of industry-specific standards for flame retardancy. As epoxies themselves are a polymeric material, their testing is generally covered under the Underwriter’s Laboratory UL...

PARAMETERS ASSESSED DURING FLAME RETARDANCY TESTING As with any material or safety testing, the nature of the test conditions and the requirements are specific to the application at hand. Some commonly assessed parameters include: SMOKE - The primary cause of death in fires. Standardized test chambers—such as the National Bureau of Standards (NBS) Smoke Density Chamber—are used to determine the extent of smoke generation when the test material is exposed to a standardized radiant heat source or open flame. The specific optical density of the smoke is measured and provides a means to...

At Master Bond, we understand the crucial role of flame retardant epoxies in assuring project success, safety, and reliability. Our products meet a variety of Flame Retardancy standards including Underwriters Laboratory (UL) standards for general consumer goods and electronics. We are also proud to offer specialized standards for the aviation and avionics industry including FAR, Airbus, and Boeing standards. AIRBUS STANDARDS BOEING STANDARDS *Please note that epoxy system EP36FR offers different packaging options as stated on the specific product page Vertical Burn: Part I (a)(1)(i) Amdt....

PRODUCTS MEETING UNDERWRITERS LABORATORIES STANDARDS UL 94 Flame retardancy standard for plastics and polymeric materials used in consumer goods and electronics. A flame is applied to the test material for a period of time in order to promote ignition. Parameters such as burning time, burn rate, afterglow following ignition, flaming drips, and combustion up to the holding clamp are measured depending on the specifics of the test and the sample thickness. The test may be done in horizontal or in vertical orientation—the vertical orientation test and rating, UL 94V-0, is more stringent...

Key Features • Good flow properties ideal for electronic potting and encapsulation • Convenient processing, 1:1 mix ratio by weight • Meets UL 94V-0 flame retardant specifications • Cures at room temperature in 48-72 hours or 2-3 hours at 200°F Flammability Value Test Method Test Method Thermal Value Tensile Lap Shear Strength, Al-Al, 75°F >1,200 psi Coefficient of Thermal Expansion 50-55 x 10-6 in/in°C Service temperature range -51°C to +90°C [-59.8°F to +194°F]

Key Features • Convenient processing, 1:1 mix ratio by weight • Low shrinkage upon cure and excellent dimensional stability • For bonding, sealing, coating and potting applications Test Method Flammability Value Flame Rating Tensile Lap Shear Strength, Al-Al, 75°F Coefficient of Thermal Expansion Service temperature range Electrical Value Test Method High Amp Arc Ignition PLC 0 UL 746A Value Test Method UL 746B

PRODUCTS MEETING FAR STANDARDS FAR Standard 14 CFR 25.853(a) Horizontal Burn for Flame Retardant Epoxy This test is specified in Amendment 25-116 and Part 25 Appendix F. The sample is assessed for Burn Rate, Burn Length, and Elapsed Time of burn. These assessed parameters must conform to the specifications laid out under Part I (a)(1)(iv) Amdt. 25-111 for Horizontal.

Key Features • Exceptionally low shrinkage and high dimensional stability • Superb electrical insulator • Passes horizontal burn test per FAR Standard 14 CFR 25.853(a) Amdt. 25-116 and Part 25 Appendix F, Part I (a)(1)(iv) Amdt. 25-111 Horizontal • Cure schedule: overnight at room temperature followed by 2-3 hours at 150-200°F FAR Standard 14 CFR 25.853(a): Horizontal Burn Master Bond EP90FR-H: CONFORMS Tensile Lap Shear Strength, Al-Al, 75°F >1,500 psi Coefficient of Thermal Expansion 35-40 x 10-6 in/in°C Service temperature range -51°C to +121°C [-60°F to +250°F]

Key Features • Easy to use 1:1 mix ratio by weight and low shrinkage • Toughened epoxy that withstands thermal cycling, mechanical shock and vibration • Passes horizontal burn test per FAR Standard 14 CFR 25.853(a) Amdt. 25-116 and Part 25 Appendix F, Part I (a)(1)(iv) Amdt. 25-111 Horizontal • Cure schedule: overnight at room temperature followed by 3-4 hours at 150-200°F FAR Standard 14 CFR 25.353(a): Horizontal Burn Flams Size: 1 1/2 inch Ignition Exposure: 15$ Burner Fuel: Methane Flame Temp: 1633 aF min. Master Bond EP90FR-HFL: CONFORMS Hardness after 1,000 hrs @ 85°C/85%RH 35 Shore D...

Key Features • Easy to use 1:1 mix ratio by weight and low shrinkage • Favorable thermal conductor and electrical insulator • Passes verticle burn test per FAR Standard 14 CFR 25.853(a) Amdt. 25-116 and Part 25 Appendix F, Part I (a)(1)(i) Amdt. 25-111 Vertical • Cure schedule: overnight at room temperature followed by 3-4 hours at 150-200°F Thermal Conductivity, °F 3.5-4.2 BTU-in/(ft2-hr-°F) [0.5-0.6 W/(m^K)] Tensile Lap Shear Strength, Al-Al, 75°F 800-1,000 psi Coefficient of Thermal Expansion 25-30 x 10-6 in/in°C Service Temperature Range -62°C to +149°C [-80°F to +300°F]