Testing & Technical Data

Description

ER500 is a low viscosity clear laminating resin that is designed for structural production applications. When used with the two hardeners listed here, the combinations provide excellent wet-out and chemical adhesion of fiberglass, carbon and aramid fibers.
Typical applications include aircraft, boats, auto body, structural components and parts. Hardeners EH725 and EH750 are the standard production hardeners for fabricating composite parts. EH750 has been developed to provide a longer working time for larger and/or more complicated laminates when needed.

EH725 is a faster setting hardener that can be used for patching, repairs and smaller laminates.
These products contain no toxic organic compounds or heavy metals. They surpass Southern California Air Quality standards and are soon to be Green Seal Certified. Both components are waterproof for high humidity environments.

Handling and Curing

EH725 and EH750 are the hardeners typically used to fabricate high performance composite parts. EH750 has a 20 minute working time and can be used for all sizes of parts using the contact lay-up method of fabrication. If the vacuum bagging technique is being used, EH750 should only be used for smaller parts. Hardener EH725 has a longer working time that is useful for vacuum bagging larger parts before the resin has gelled. Both of these hardeners will cure completely at room temperature (77°F or above). When constructing 2-3ply, thin laminates for overnight demolding and sandability a room temperature of 77°F or above is required. In thicker laminates and larger masses with these hardeners, plan to allow the laminate to cure at least 12 hours, at a minimum of 75°F, before moving the structure. Hardeners EH725 and EH750 will cure completely at room temperature, and does not require a heat cure. It is intended for fast repairs or additions to a primary structure, and for parts that will be exposed to lower service temperatures. All primary structures should be fabricated with EH725 to take advantage of its longer work life and better service temperature capabilities.

Safety and Handling

EcoPoxy contains no toxic organic compounds and heavy metals and therefore offer the user high performance products with minimum hazard potential when properly used. EcoPoxy resins and hardeners will present no handling problems if users exercise care to protect the skin and eyes and adequate ventilation is provided in work areas. However, all epoxy resins and hardeners can be irritating to the skin and prolonged contact may result in sensitization; and inhalation of mist vapors may cause allergenic respiratory reaction, especially in highly sensitive individuals.

As such, avoid contact with eyes and skin, and avoid breathing vapors. Wear protective rubber apron, clothing, gloves, face-shield or other items as required to prevent contact with the skin. In case of skin contact, immediately wash with soap and water, followed by a rinse of the area with vinegar and a final wash with soap and water. The vinegar will neutralize the hardener and lessen the chances of long term effects. Use goggles, a face-shield or safety glasses and other items as required to prevent contact with the eyes.
If material gets into the eyes, immediately flush with water for at least 15 minutes and call a physician. Generally, keep the work area as uncluttered and clean as possible, and clean up any minor spills immediately to prevent accidental skin contact at a later time. Keep tools clean and properly stored.
Dispose of trash and empty containers properly. Do not use any of these types of products until Material Safety Data Sheets have been read and understood.