Photoreactive oligomer composition and printing plate

Details Photoreactive oligomer composition and printing plate Photoreactive oligomer composition and printing plate

1990-04-10

1992-02-25

Hamilton, Cynthia

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430309, 430284, 430278, 430325, 522 90, 522 63, 525502, 525920, 526301, 528 75, G03F 730, G03F 7038

Patent

active

050912879

ABSTRACT:
Disclosed are novel dry, non-tacky photopolymer precursors or isocyanate-free urethane oligomers which are the reaction products of heat reactive phenolic resins and unsaturated monoisocyanates, e.g. a methylol containing resole and isocyantoethyl methacrylate. The reaction product combined with a haloalkyl triazine photosensitizer and an inert organic solvent provides an excellent coating for a variety of substrates used in the printing and publishing industry, e.g. grained, anodized aluminum lithoplates. The presensitized lithographic plates can be used in aqueous alkaline based development processes and exhibit an increased resistance to solvent attack during the development and printing processes.

REFERENCES:
patent: 3644289 (1972-02-01), Sayigh et al.
patent: 3928299 (1975-12-01), Rosenkranz et al.
patent: 3987037 (1976-10-01), Bonham et al.
patent: 4189323 (1980-02-01), Buhr
patent: 4316949 (1982-02-01), Petrellis et al.
patent: 4448951 (1984-05-01), Rupert et al.

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