Photopolymerization co-initiator compositions comprising...

Details Photopolymerization co-initiator compositions comprising... Photopolymerization co-initiator compositions comprising...

C - Chemistry, Metallurgy

08

F

252/124, 96/150,

C08F 2/50 (2006.01) C08J 3/28 (2006.01) G03F 7/031 (2006.01)

Patent

CA 1137696

Abstract A co-initiator for use in an improved photopoly- merizatior composition, element and method is disclosed. The photopolymerization composition comprises an addition- polymerizable compound containing etylenic unsaturation and the co-initiator which includes a photopolymerization activator and an amine-substituted ketocoumarin sensitizer having an absorption maximum between about 350 and about 550 nm; said activator having the structure (I) Image or (II) Image wherein Q1 and Q2 are each independently hydrogen; alkyl, thioalkyl or alkoxy containing from 1 to about 5 carbon atoms; aryl or aryloxy containing from about 6 to 10 carbon atoms; hydroxy; or halogen; or together Q1 and Q2 are the necessary atoms to complete a fused heterocyclic or aromatic ring containing from about 4 to 6 ring atoms; and Q3 is hydrogen or alkyl containing from 1 to about 5 carbon atoms.

348541

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