Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1995-05-10
1996-01-02
Dentz, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
546 66, 546133, 546244, 549287, C07D40500, C07D45302, C07D31102
Patent
active
054809940
ABSTRACT:
Aminoketone-substituted coumarin sensitizers having quaternary amine substituents are described which have very high photosensitivity, and are useful in moderate pH aqueous-developable printing plates.
The aminoketone-substituted coumarin sensitizers are described by the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group having 1 to 6 carbon atoms, and R.sub.3 and R.sub.4 each represent hydrogen; or at least one of R.sub.1 and R.sub.3 or R.sub.2 and R.sub.4 together represent an alkylene group having 2 to 4 carbon atoms,
R.sub.5 represents an alkyl group having 1 to 6 carbon atoms or H,
R.sub.6 represents an alkylene group having 1 to 16 carbon atoms, an oxyalkylene group having form 1 to 16 carbon atoms, or a poly(oxyalkylene) group in which said alkylene group has 2 to 4 carbon atoms and the number of oxygen atoms is a positive integer less than or equal to four,
R.sub.7, R.sub.8, and R.sub.9 each independently represent an alkyl group having 1 to 6 carbon atoms, or any two of R.sub.7, R.sub.8, and R.sub.9 taken together represent an alkylene group having 4 to 6 carbon atoms; R.sub.7, R.sub.8, and R.sub.9 taken together with the N atom to which they are bonded represent a quinuclidinio group, or R.sub.6, taken together with R.sub.7, R.sub.8, or R.sub.9 represent a five, six, or seven membered heterocyclic ring group, and
X.sup.- represents any anion.
Photopolymer compositions comprising a free-radically polymerizable material, a photoinitiator, and an aminoketone-substituted coumarin sensitizer having quaternary amine substituents, are also disclosed.
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Dentz Bernard
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Moeller Zerull Susan
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