CC1C(N=C=O)=CC([N:8]=C=O)=CC=1.CCCCO[C@H](CO)CC.C([O-])(=O)C.C([O-])(=O)C.C([Sn+2]CCCC)CCC.COC1C=CC(O)=CC=1.[C:50]([O:54][CH2:55][CH2:56]O)(=[O:53])[CH:51]=[CH2:52]>>[C:50]([OH:54])(=[O:53])[CH:51]=[CH2:52].[NH2:8][C:50]([O:54][CH2:55][CH3:56])=[O:53]In a flask equipped with a stirring blade, 348 parts (2 mol) of TDI (2,4-tolylene diisocyanate) was charged and 2000 parts (1 mol) of polytetramethylene glycol (number-average molecular weight of 2000) and dibutyltin diacetate were added while stirring. After heating to 70° C. while paying attention to heat generation, 0.2 parts of p-methoxyphenol and 1 part of 2,6-tertiary butyl-4-methylphenol were added. The reaction was conducted at the same temperature for 7 hours. Then, 232 parts (2 mol) of HEA (2-hydroxyethyl acrylate) was charged and the reaction was further reacted at the same temperature for 7 hours. After confirming the disappearance of absorption of NCO by infrared absorption spectrum, the reaction product was taken out to obtain a urethane acrylate (OS-2) as a radical polymerizable oligomer (A1).
불러오는 중…
