Use of 2-(N-methyl-N-phenylamino)-1-phenylethanol as synergist in UV-curing applications

2-(N-Methyl-N-phenylamino)-1-phenylethanol in formulations was used as an aminoalcohol to help reduce the effect of oxygen inhibition and to act as synergist with a Type II initiator. When the aminoalcohol in the formulation containing Trimethylolpropane triacrylate (TMPTA) is replaced by the NMDEA at the 10% level, the same amount of cure is obtained after one pass as when 1% aminoalcohol is used. It was found that the aminoalcohol was efficient at reducing oxygen inhibition and act as an excellent synergist for isopropylthioxanthone.