BECKOPOX™ EH 694 is an aromatic polyanhydride hardener primarily designed for use with solid epoxy resins, hydroxyl-functional polyesters, or as an additional crosslinker for epoxy/polyester hybrid systems utilized in the production of powder coatings. Here are the key details about BECKOPOX™ EH 694:
General Description: It is a hardener known for imparting chemical and over-bake resistance to the coatings. This makes it particularly suitable for applications where durability and resilience are crucial.
Product Specification:
Starting Formulation: The recommended formulation includes CRYLCOAT® 2818-0 and CRYLCOAT® 1626-0 polyester hybrid, along with epoxy resin, BECKOPOX™ EH 694 as a hardener, ADDITOL® P 896, titanium dioxide, barium sulfate, and benzoin.
Extrusion & Application Conditions: Extrusion is done using a twin-screw extruder with specific speed, torque, and temperature settings. The application involves spraying a 60 micrometer film on a 0.5 mm steel panel using a spray gun with a specified output voltage. Curing conditions vary based on the type of system used.
Film Properties: The resulting film exhibits desirable properties such as gloss and impact resistance.
Shelf Life: Under normal storage conditions (≤25°C), the shelf life of the resin is 12 months from the date of manufacturing. It is recommended to check the acid value every year for product older than 12 months.
Safety & Environmental Protection: Safety and environmental considerations are addressed, with more information available in the Material Safety Data Sheet.
In summary, BECKOPOX™ EH 694 serves as an essential component in powder coating formulations, contributing to their durability, chemical resistance, and overall performance.
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