Sensitized aromatic iodonium or aromatic sulfonium salt photoinitiator systems
AssigneeMinnesota Mining and Manufacturing Company
InventorGeorge H. Smith
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Abstract
Iodonium and sulfonium photoinitiators are naturally sensitive to only a small portion of the electromagnetic spectrum. Various classes of sensitizing dyes for iodonium and sulfonium salts are disclosed herein.
Claims17
A sensitized iodonium or sulfonium photoinitiator system comprising one part of an aromatic sulfonium salt or an aromatic iodonium salt photoinitiator associated with 0.01 to 10 parts of a fluorescent compound selected from polyarylenes, polyarylpolyenes, 2,5-diphenylisobenzofurans, 2,5-diarylfurans, 2,5-diarylthiofurans, 2,5-diarylpyrroles, 2,5-diarylcyclopentadienes, polyarylphenylenes, coumarins, and polyaryl-2-pyrazolines.
A sensitized sulfonium photoinitiator system comprising one part of an aromatic sulfonium salt photoinitiator associated with 0.1 to 10 parts of a fluorescent polyarylene compound.
Dependencies are inferred from the claim text.