Dytek 12 1,12-Dodecanediamine 2783-17-7 Invista Polyurethane (PU) - Polyols Polyamide (PA) Inks Coatings Dytek® 12 (1,12-Dodecanediamine) is a 12 carbon aliphatic diamine. It is a highly versatile polymer monomer and chemical intermediate that is useful in the manufacture of a variety of products. White flakes. It is used in polyurethane system, polyamides, coatings & inks, copolymers, crosslinkers and chainextenders, pharmaceuticals, surfactants, elastomers & rubbers. 1,12-Dodecanediamine. Used in coatings & inks.