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Three component ketocoumarin, amine, maleimide photoinitiator I |
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| Authors: | Chau K Nguyen Charles E Hoyle Tai Yeon Lee |
| Institution: | a Albemarle Corporation, Baton Rouge, LA 70801, USA b University of Southern Mississippi, Department of Polymer Science and Engineering, Hattiesburg, MS 39406-0076, USA c Fusion UV - Curing Systems, Inc. Gaithersburg, MD 20878, USA |
| Abstract: | An N-substituted maleimide has been used in conjunction with ketocoumarins and a tertiary amine to initiate the polymerization of 1,6-hexanedioldiacrylate in both the UV (365/366 nm) and visible region (436 nm) of the electromagnetic spectrum. The rate of polymerization of three ketocoumarin/tertiary amine combinations are significantly increased by the addition of a N-substituted maleimide, presumably due to oxidation of the coumarin ketyl radical formed by interaction between the triplet state of the ketocoumarin and the tertiary amine. |
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