68 piperazine (PIP68)

Adhesives and Sealants
Piperazine can be used in the production of polyamides for hot-melt, pressure-sensitive, and heat-seal adhesives for leather, paper, plastic, and metal.

Coatings
Piperazine is used in the production of polyamide resins (a reagent, along with fatty acids), urethane and epoxy systems. In polyurethanes it is both a catalyst, a reagent and a reactant used to produce polyol components.

Inks
Polyamide resins based on piperazine find use as binders in printing inks for flexogravure printing on certain paper, film, and foil webs. Thermoplastic polyamides are similarly used in formulating glossy, abrasion-resistant, overprint varnishes

Oil and Gas
Piperazine is employed as a an additive in the CO2 and H2S gas treatment area.

Other
Piperazine finds application as a reagent in the production of polyurethanes for foams and fibers.

(Quoted from Wikipedia)