July 10, 2022 Longchang Chemical

UV ink basic components: photosensitizer and light sensitizer

Photosensitizers are molecules that absorb light energy and then transfer the energy to the photoinitiator, and return to their initial inactive state after transferring the energy.

Photosensitizer properties: photosensitizers and photoinitiators are the same point is that they can trigger the polymerization of monomers or prepolymers, the difference is that photosensitizers do not cross-linked branches in the monomer or prepolymer molecules, but will receive light energy transferred to the photoinitiator and its own reduction; add different photosensitizers can absorb a wider range of UV light or visible light and other light waves, and then the energy will be converted to the photoinitiator to promote polymerization, which can expand the light The light-sensitive range of the photoinitiator can be expanded, such as the addition of long-wavelength light-sensitive photosensitizers in dark ink can improve the curing effect of long-wave UV light to promote the curing of dark colors, large particles, masking ink.

 

Disadvantages: Most photosensitizers are organic compound molecules that absorb energy in the visible region, so the ink will trigger curing in visible light and is not conducive to the use and storage of ink and manufacturing, and most photosensitizers are colored or its photochemical reaction products colored not suitable for printing.

Photo-sensitizers
Photo sensitizers are molecules (usually amines) that do not absorb radiation and do not initiate polymerization, but can increase the effective rate of activity of photoinitiators.

 

Light sensitizer (light activator or light enhancer) characteristics: light sensitizer role is to increase the photoinitiator sensitization rate, accelerate the curing of ink. Currently often use amine sensitizer selection should pay attention to several aspects. Sensitizers are not film-forming substances are volatile, some amines such as triethylamine volatile odor is not suitable for printing inks.

UV Photoinitiator Same series products

Product name CAS NO. Chemical name
Sinocure® TPO 75980-60-8 Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide
Sinocure® TPO-L 84434-11-7 Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
Sinocure® 819/920 162881-26-7 Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide
Sinocure® 819 DW 162881-26-7 Irgacure 819 DW
Sinocure® ITX 5495-84-1 2-Isopropylthioxanthone
Sinocure® DETX 82799-44-8 2,4-Diethyl-9H-thioxanthen-9-one
Sinocure® BDK/651 24650-42-8 2,2-Dimethoxy-2-phenylacetophenone
Sinocure® 907 71868-10-5 2-Methyl-4′-(methylthio)-2-morpholinopropiophenone
Sinocure® 184 947-19-3 1-Hydroxycyclohexyl phenyl ketone
Sinocure® MBF 15206-55-0 Methyl benzoylformate
Sinocure® 150 163702-01-0 Benzene, (1-methylethenyl)-, homopolymer,ar-(2-hydroxy-2-methyl-1-oxopropyl) derivs
Sinocure® 160 71868-15-0 Difunctional alpha hydroxy ketone
Sinocure® 1173 7473-98-5 2-Hydroxy-2-methylpropiophenone
Sinocure® EMK 90-93-7 4,4′-Bis(diethylamino) benzophenone
Sinocure® PBZ 2128-93-0 4-Benzoylbiphenyl
Sinocure® OMBB/MBB 606-28-0 Methyl 2-benzoylbenzoate
Sinocure® 784/FMT 125051-32-3 BIS(2,6-DIFLUORO-3-(1-HYDROPYRROL-1-YL)PHENYL)TITANOCENE
Sinocure® BP 119-61-9 Benzophenone
Sinocure® 754 211510-16-6 Benzeneacetic acid, alpha-oxo-, Oxydi-2,1-ethanediyl ester
Sinocure® CBP 134-85-0 4-Chlorobenzophenone
Sinocure® MBP 134-84-9 4-Methylbenzophenone
Sinocure® EHA 21245-02-3 2-Ethylhexyl 4-dimethylaminobenzoate
Sinocure® DMB 2208-05-1 2-(Dimethylamino)ethyl benzoate
Sinocure® EDB 10287-53-3 Ethyl 4-dimethylaminobenzoate
Sinocure® 250 344562-80-7 (4-Methylphenyl) [4-(2-methylpropyl)phenyl] iodoniumhexafluorophosphate
Sinocure® 369 119313-12-1 2-Benzyl-2-(dimethylamino)-4′-morpholinobutyrophenone
Sinocure® 379 119344-86-4 1-Butanone, 2-(dimethylamino)-2-(4-methylphenyl)methyl-1-4-(4-morpholinyl)phenyl-
Sinocure® 938 61358-25-6 Bis(4-tert-butylphenyl)iodonium hexafluorophosphate
Sinocure® 6992 MX 75482-18-7 & 74227-35-3 Cationic Photoinitiator UVI-6992
Sinocure® 6992 68156-13-8 Diphenyl(4-phenylthio)phenylsufonium hexafluorophosphate
Sinocure® 6993-S 71449-78-0 & 89452-37-9 Mixed type triarylsulfonium hexafluoroantimonate salts
Sinocure® 6993-P 71449-78-0 4-Thiophenyl phenyl diphenyl sulfonium hexafluoroantimonate
Sinocure® 1206 Photoinitiator APi-1206

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