Adipic Dihydrazide (ADH)
Adipic Dihydrazide (ADH) is a symmetrical molecule with a C4 backbone and two reactive hydrazide groups. The dihydrazide group allows ADH to react as crosslinking agent in epoxy, acrylic, and polyurethane compounds. The applications of ADH are facilitated by the nucleophilicity of the amine function group, the good overall properties and weather ability of systems. The moderate solubility of ADH in organic solvent and water facilitates the use of ADH in aqueous and solvent based systems.
ADH compounds are widely used in paint and adhesive thermoset applications. This includes latent hardeners for epoxy resins, cross linking agents in acrylic emulsions with ketone groups, and chain extender for polyurethanes. ADH is used for formaldehyde scavenger preventing the liberation of formaldehyde.
|Appearance||White to off-white powder|
|Assay (%)||min. 97|
|Loss on drying (%)||max. 0.5|
|pH (1% aq. Solution)||6.5 - 8.5|
|Melting point (oC)||178 - 185|
|Boilling point (oC)||426|
|Density (g/cm3)||1.29 (at 20 oC)|
|Solubility in water (g/L)||91|
Standard package is 25 Kg in HDPE FFS Bags.
SAFETY & HANDLING
ADH is unlikely to present any significant health or safety hazard when properly used in the recommended application. May cause an allergic skin reaction and respiratory irritation. Contaminated work clothing should not be allowed out of the workplace. Wear protective gloves. Use only outdoors or in a well-ventilated area. Avoid ingestion and inhalation. Avoid dust formation.
For storage matter, it is recommended that ADH be used before two years after the date of manufacturing. Store ADH in a well-ventilated place. Keep container tightly closed and store locked up.
Adipic Acid Dihydrazide (ADH) is widely used as :
- Cross-linker in waterborne acrylic emulsions architectural coatings.
- Water based Coatings.
- Enhances performance of epoxy resins.
- Extender chains of polyurethane.
- Finished textiles.
- Wood processing to minimize formaldehyde exposure.