Lithographic printing plate precursor

Details Lithographic printing plate precursor Lithographic printing plate precursor

2005-04-28

2008-11-11

Walke, Amanda C. (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

C430S270100, C430S281100, C430S933000

Reexamination Certificate

active

07449282

ABSTRACT:
A lithographic printing plate precursor comprising a photosensitive layer comprising: (A) a fluorescent brightening agent; (B) an activator compound being capable of inducing a chemical change by an interaction with light absorption of the fluorescent brightening agent to produce at least one of a radical, an acid and a base; (C) a compound being capable of undergoing a reaction by an effect of at least one of a radical, an acid and a base to irreversibly change in its physical or chemical properties; and (D) a polyurethane resin binder, wherein the polyurethane resin binder is synthesized from at least following compounds (i), (ii), (iii) and (iv): (i) a diisocyanate compound; (ii) a diol compound having at least one carboxyl group; (iii) a diol compound having a logP value of less than 0; and (iv) a diol compound having a logP value of 0 or more, with the proviso that each of the diol compound (iii) and the diol compound (iv) does not have a carboxyl group.

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