One example of an intermediate is adipic acid dihydrazide, which has a pair of key uses in chemical reactions. Formulators may use ADH for cross-linking of water-based emulsions, as well as a hardening agent for certain epoxy resins. The intermediate diacetone acrylamide is used for cross-linking in waterborne acrylic emulsions.
Hexamethylenetetramine, also commonly known as hexamine, is used in the production of phenolic resins and phenolic resin molding compounds, as a hardening agent. We see wide application of these resins and compounds as binders, in products ranging from nonwoven textiles to fireproofing materials, abrasive products, and automotive uses.