Sensitized photopolymerizable compositions and use thereof in li

Details Sensitized photopolymerizable compositions and use thereof in li Sensitized photopolymerizable compositions and use thereof in li

1996-11-19

1999-08-24

Nuzzolillo, Maria

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

4302881, 430919, 430920, 430926, 522 25, 522 26, 522 28, 522 30, 522173, 522182, G03C 173

Patent

active

059423722

ABSTRACT:
Improved photopolymerization initiator systems are comprised of a spectral sensitizer that sensitizes in the ultraviolet or visible regions of the spectrum and an N-aryl, O-aryl or S-aryl polycarboxylic acid co-initiator. The improved initiator systems are incorporated in photo-polymerizable compositions containing one or more addition-polymerizable ethylenically-unsaturated compounds to form compositions suitable for the preparation of radiation-sensitive layers in lithographic printing plates adapted to be imagewise-exposed with ultraviolet- or visible-light-emitting lasers such as argon-ion lasers and frequency doubled Nd:YAG lasers. Such plates are able to effectively meet the dual requirements of very high photospeed and very good shelf-life required in computer-to-plate systems.

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