Adipic acid dihydrazide

Chemical compound

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Adipic acid dihydrazide is a chemical compound with the formula C_H__N_O_. It is a derivative of adipic acid, where the carboxylic acid groups are converted to hydrazide groups. This compound is used in various industrial applications, including as a curing agent for epoxy resins and as a cross-linking agent in the production of water-based polymers.

Chemical structure and properties

Adipic acid dihydrazide is a white crystalline solid at room temperature. It is soluble in water and has a melting point of approximately 177°C. The compound consists of a six-carbon chain (derived from adipic acid) with two terminal hydrazide groups (–CONHNH_). These hydrazide groups are responsible for its reactivity and utility in polymer chemistry.

Synthesis

Adipic acid dihydrazide is synthesized by the reaction of adipic acid with hydrazine. The process involves the conversion of the carboxylic acid groups of adipic acid into hydrazide groups through a condensation reaction. This reaction typically requires heating and may be catalyzed by acidic or basic conditions to increase the reaction rate.

Applications

Adipic acid dihydrazide is primarily used as a cross-linking agent in the production of water-based polymers. It reacts with functional groups such as aldehydes and ketones to form stable cross-linked networks, enhancing the mechanical properties and durability of the resulting materials. This makes it valuable in the production of coatings, adhesives, and sealants.

In addition, adipic acid dihydrazide is used as a curing agent for epoxy resins. It facilitates the formation of a three-dimensional network, improving the thermal and chemical resistance of the cured epoxy.

Safety and handling

As with many chemical compounds, proper safety precautions should be taken when handling adipic acid dihydrazide. It should be stored in a cool, dry place, and contact with skin and eyes should be avoided. Personal protective equipment such as gloves and goggles is recommended when working with this compound.

Related pages

• Adipic acid
• Hydrazine
• Epoxy resin
• Polymer chemistry