Novel Trialkoxy-Substituted Onium Salts as Highly Sensitive and Stable Photoinitiators Reactive to IR Laser

New series of diazonium salts and iodonium salts, which show practical level of sensitivity and stability as an IR sensitive photoinitiator for CTP plates, are developed. We investigated the substituent effect on the pheny group adjacent to diazonium or iodonium group. The results show 2,4,6-trialko...

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Bibliographic Details
Published inJournal of Photopolymer Science and Technology Vol. 27; no. 6; pp. 695 - 702
Main Authors Kunita, Kazuto, Ooshima, Yasuhito, Oohashi, Hidekazu
Format Journal Article
LanguageEnglish
Published Hiratsuka The Society of Photopolymer Science and Technology(SPST) 01.01.2014
Japan Science and Technology Agency
Subjects
Balancing
Darkrooms
IR laser
Lasers
Phenyls
photoinitiator
Photoinitiators
Photopolymers
Plates
Stability
trialkoxy-substituted onium salts
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Summary:New series of diazonium salts and iodonium salts, which show practical level of sensitivity and stability as an IR sensitive photoinitiator for CTP plates, are developed. We investigated the substituent effect on the pheny group adjacent to diazonium or iodonium group. The results show 2,4,6-trialkoxy substituted phenyl group can beautifully balance sensitivity, thermal stability and light stability for both series of initiators. These new onium salts made it possible to create CTP plates that are processible without darkroom conditions.
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ISSN:0914-9244
1349-6336
DOI:10.2494/photopolymer.27.695