Journal
PROGRESS IN ORGANIC COATINGS
Volume 168, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2022.106876
Keywords
Photoinitiators; Acylphosphine oxide; High initiation efficiency; Migration ratio
Funding
- Research Fund Program of Guangdong Province Key Lab of Green Chemical Product Technology [GC201818]
- Guangdong Innovative Youth Talents Program, China [2018KQNCX283]
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Two low migration acylphosphine oxide photoinitiators (APO and DAPO) containing unsaturated C=C double bonds have been designed and synthesized for free radical polymerization. The properties and performances of APO and DAPO were evaluated and compared with a commercial photoinitiator, showing that DAPO exhibited the best double bond conversion and lower migration, making it a potential candidate for industrial applications.
Two low migration acylphosphine oxide photoinitiators (APO and DAPO) containing unsaturated C=C double bonds have been designed and synthesized for free radical polymerization. The properties and performances of APO and DAPO in the free radical polymerization of trimethylolpropane triacrylate (TMPTA) were evaluated and compared with the commercial photoinitiator 2,4,6-trimethyl(phenyl) diphenyl oxide (TPO). The results show that DAPO exhibited the best double bond conversion (DC) of TMPTA in the photoinitiators tested under the same reaction conditions. The migration ratio of APO and DAPO was 2/3 and 1/3 of that of TPO respectively indicating lower migration than the conventional photoinitiator, and the solubility of DAPO in monomers was close to that of TPO, which provided the possibility for the industrial application of DAPO.
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