Epoxy resins are foundational materials in numerous high-performance applications, from aerospace and automotive components to durable construction materials. The efficacy of an epoxy system is heavily reliant on the curing agent used. Adipic Dihydrazide (ADH), a versatile chemical intermediate with the CAS number 1071-93-8, has emerged as a crucial curing agent, particularly for epoxy formulations where enhanced toughness, flexibility, and thermal stability are critical.

Adipic Dihydrazide is a symmetrical molecule containing two hydrazide functional groups. This structure enables it to react effectively with epoxy groups, acting as a hardener that promotes significant crosslinking. Each ADH molecule possesses an equivalency of four per epoxy moiety, contributing to a highly crosslinked network. The active hydrogen equivalent weight of ADH is 43.5, which allows for flexible stoichiometric proportions in formulations without compromising mechanical properties. This makes ADH an attractive option for manufacturers aiming to buy epoxy curing agents that offer predictable and robust performance.

A notable characteristic of ADH as an epoxy curing agent is its melt-out temperature, which influences cure kinetics. This property allows for extended pot life at lower temperatures, providing formulators with greater control over processing times. Curing can be achieved in approximately one hour at 130°C, with cure rates adjustable using catalysts. Furthermore, ADH facilitates the creation of one-component epoxy systems that can be partially cured or 'B-staged,' offering significant advantages in handling, processing, and fabrication. This B-staging capability is particularly valuable in composite manufacturing and adhesive applications.

When formulated with epoxy resins, ADH imparts excellent toughness, flexibility, and adhesive properties. It can achieve glass transition temperatures (Tg) of 140-160°C, depending on the epoxy resin used. Whether used in rigid or flexible epoxy adhesives, ADH contributes to formulations that exhibit excellent cohesive and adhesive properties to a wide variety of surfaces. As a leading manufacturer and supplier of Adipic Dihydrazide in China, we ensure a consistent supply of high-purity ADH, meeting the stringent demands of the epoxy resin industry. If you are seeking a reliable source to purchase ADH for your epoxy applications, our team is ready to assist with technical specifications and competitive pricing.