Photoinitiator composition containing bis ketocoumarin dialkylamino benzoate, camphorquinone and/or a triphenylimidazolyl dimer
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United States of America Patent
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Jan 16, 1990
Issued Date -
N/A
app pub date -
Nov 16, 1988
filing date -
Nov 12, 1986
priority date (Note) -
Expired
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Abstract
Photoinitiator compositions are disclosed which contain 3,3'-carbonyl bis(7-diethylaminocoumarin); an alkyl ester of a p-dialkylamino benzoic acid; and either camphorquinone or a 2,4,5-triphenylimidazolyl dimer. Photoinitiators are also provided which contain 3,3'-carbonyl bis(7-diethylaminocoumarin); an alkyl ester of a p-dialkylamino benzoic acid; camphorquinone and a 2,4,5-triphenylimidazolyl dimer. These latter photoinitiators are particularly useful in photopolymerizable compositions which are polymerized by exposure to visible laser light.
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