A curing agent employed in the crosslinking process that defines not only the final properties of the thermosets but also the technological conditions of application. Dycure ADH is an aliphatic (C-4) backboned dihydrazide, which is commonly used as a curing agent for epoxy resins in one component formulations. Studies reveal that this hardener provides a high glass transition temperature that offers curing above 120°C, high degree of toughness and excellent adhesion to oily substrate. To decrease the curing temperature, Dycure ADH can be utilized with accelerators to increase reactivity. Some recommended accelerators for Dycure ADH include substituted ureas such as Dycure U300, Dycure U500-21, and Dycure U700-22. These accelerators lower the activation temperature of Dycure IDH without any adverse impact on performance properties. Dycure ADH is typically employed in one component adhesives, acrylics, urethane, and hot-melt prepregs due to the high Tg, excellent toughness and high water solubility properties. Dycure ADH can also be used in reaction as a curative for urethanes and acrylics due to its highly water solubility character (˃50%), which is a cross-linker agent in water dispersed acrylics and urethanes. Micronized grade of Dycure ADH is available as Dycure ADH |
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