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

سال انتشار: 1391
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,525

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شناسه ملی سند علمی:

SDTC03_061

تاریخ نمایه سازی: 4 اسفند 1391

چکیده مقاله:

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

نویسندگان

Behzad Shirkavand Hadavand

Department of Resin and Additives, Institiute for Color Science and Technology, Tehran,Iran

Farhood Najafi

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

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