Farhood Najafi - Department of Resin and Additives, Institiute for Color Science and Technology, Tehran,Iran
Behzad Shirkavand Hadavand - Department of Resin and Additives, Institiute for Color Science and Technology, Tehran,Iran
Ahmad Mirshokrai - Department of Resin and Additives, Institiute for Color Science and Technology, Tehran,Iran

The quaternary ammonium salt can be used as biocide in coatings. In this research, we have been synthesized a novel photopolymerizable poly (quaternary ammonium salt) (PQAS) as biocide for using in UB-curable coatings. The first, a oliqo-urethane bearing tertiary amine groups in backbone and NCO terminal-end groups was synthesized by isophorone diisocyanate (IPDI) and N-methyldiethanolamine (MDEA) in the presence of dibutyltin dilaurate (DBTDL) as catalyst and acetone as a reaction solvent. The next step, photopolymerizable urethane acrylate bearing tertiary amine groups was synthesized by reaction of hydroxythyl methacrylate (HEMA) with NCO terminal-end groups. Then, tertiary amine qroups in urethane acrylate were quaternized by benzyl chloride. Finally, acetone was removed by vacuum oven. The PQAS was characterized by H-NMR and FT-IR The novel photopolymerizable poly (quaternary ammonium salt) was compared with cetyldimethylbenzyl ammonium chhoride as biocide. On the other hand, it acted as cross-linking agent in UV-curable coatings.

Synthesis,UV-curable coatings, biocide, quatemary ammonium salt