AEP N-aminoethylpiperazine 140-31-8 Tosoh Polymer intermediates ADHESIVE >> Hot-melt N-aminoethylpiperazine. Designed to manufacture thermoplastic polyamide resin used for hot-melt adhesives. N-aminoethylpiperazine. Designed to manufacture thermoplastic polyamide resin used for hot-melt adhesives.