Thermally sensitive, multilayer imageable element

Details Thermally sensitive, multilayer imageable element Thermally sensitive, multilayer imageable element

2005-02-22

2005-02-22

Chu, John S. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaged product

Multilayer

C430S018000, C430S166000, C430S190000, C430S270100, C430S302000

Reexamination Certificate

active

06858359

ABSTRACT:
Multi-layer, positive working, thermally sensitive imageable elements, useful as lithographic printing plate precursors, are disclosed. The elements comprises a substrate, an underlayer over the substrate, and a top layer over the underlayer. The top layer comprises polymeric material, which is a solvent soluble novolac resin or a derivative thereof. The polymeric material is a (a) novolac that has a weight average molecular weight of at least 10,000, a derivative thereof functionalized with polar groups, or a derivative thereof functionalized with quadruple hydrogen bonding entities; (b) a solvent soluble m-cresol/p-cresol novolac resins that comprises at least 10 mol % p-cresol and has a weight average molecular weight of at least 8,000, a derivative thereof functionalized with polar groups, or a derivative thereof functionalized with quadruple hydrogen bonding entities; or (c) a mixture thereof. The imageable elements have increased scuff resistance and are thus less susceptible to damage during handling.

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