Synthesia and Application of Anionc Photopolymerizable Urethane Methacrylate (APUA) ad Polymeric Dispersants Used in UV-Curable Coatings

Anionic polyurethane di spersants can be used as polymeric d ispersants in paint and coatings. In this research, wehave been synthesized an anionic photopolymerizable urethane methacrylate (APUA) as photo-curable dispersant forusing in UV-curable coatings. The first, a oligo-urethane having carboxylic groups in backbone and NCO terminalendgroups was synthesized by isophorone diisocyanate (IPDI), dimethylol propionic acid (DMPA) in the presenceof dibutyltin dilaurate (DBTDL) as catal.yst and acetone as a reaction solvent. The next step, photopolymerizableurethane dispersant was synthesized by reaction of hydroxyethyl methac rylate (HEMA) with NCO terminal-endgroups. Then, carboxylic groups in photopolymerizable urethane dispersant was neutralized by triethyl amine.Finally, acetone was removed by vacuum oven. The anionic photopolymerizable urethane dispersant wascharacterized by 1H-NMR, FT-IR. The anionic photopolymerizable urethane methacrylate was investigated asdispersing agents of silica in UV -curable clear coat. Mechanical properties of surface coatings consist of hardness,cross cut, impact, MEK rub and gloss test have been determined

کلیدواژه ها:

Synthesis ، Dispersing agent ، Anionic dispersant ، Urethane Methacrylate ، UV-cure