A novel acyl phosphine compound as difunctional photoinitiator for free radical polymerization

•4-diethylaminobenzoyldipenylphosphine oxide (DEAPO) was a difunctional photoinitiator.•As type I photoinitiator, DEAPO exhibited higher curing efficiency than TPO.•Compared with DETX/EDAB, DETX/DEAPO shows higher efficiency in light curing.•The low migration ensures the application of DEAPO in huma...

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Bibliographic Details
Published in:Progress in organic coatings 2019-10, Vol.135, p.34-40
Main Authors: Xie, Chuanbao, Wang, Zhiming, Liu, Yaoyao, Song, Liang, Liu, Lei, Wang, Zhongwei, Yu, Qing
Format: Article
Language:English
Subjects:
Acylphosphine oxide
Cleavage photoinitiator
Coinitiator
Free radical polymerization
Free radicals
Low migration
Phosphines
Photopolymerization
Ultraviolet radiation
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Summary:•4-diethylaminobenzoyldipenylphosphine oxide (DEAPO) was a difunctional photoinitiator.•As type I photoinitiator, DEAPO exhibited higher curing efficiency than TPO.•Compared with DETX/EDAB, DETX/DEAPO shows higher efficiency in light curing.•The low migration ensures the application of DEAPO in human involving fields. In order to use the visible light for light curing, a new compound named 4-diethylaminobenzoyldipenylphosphine oxide (DEAPO) was designed and synthesized. Firstly, DEAPO shows good performance as the cleavage photoinitiator in the photopolymerization of trimethylolpropane triacrylate (TMPTA). The double bond conversion obtained with DEAPO system was even higher than the widely used acyl phosphine photoinitiator (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO). With the same initial quality, the migration of DEAPO was much lower than TPO. Secondly, DEAPO was successfully used as coinitiator in the H-abstraction type photoinitiation system because of the diethyl amino group. Results mean that the novel acylphosphine oxide DEAPO was an efficient difunctional photoinitiator.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2019.05.021