Aminoketone sensitizers for aqueous soluble photopolymer composi

Details Aminoketone sensitizers for aqueous soluble photopolymer composi Aminoketone sensitizers for aqueous soluble photopolymer composi

1994-04-28

1995-10-03

Dote, Janis L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430288, 430926, 522 14, 522 15, 522 34, G03C 173, G03F 7028

Patent

active

054551439

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,

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