G - Physics – 03 – F
Patent
G - Physics
03
F
G03F 7/038 (2006.01) B41N 1/14 (2006.01) B41N 3/00 (2006.01)
Patent
CA 2620655
This invention provides an original plate that can provide a lithographic printing plate having an excellent image forming capability and has good hydrophilicity in a non-image part and, at the same time, has excellent printing durability. The original plate for lithography comprises a photosensitive layer comprising a hydrophilic polymer, a crosslinking agent, hydrophobic polymer particles, and a photothermal conversion agent. The hydrophilic polymer does not substantially contain in its polymer chain any of alcoholic hydroxyl and carboxyl groups. For example, not more than 1.5% by mole of the repeating unit of the hydrophilic polymer contains an alcoholic hydroxyl or carboxyl group.
La présente invention concerne une plaque originale qui peut servir de plaque d'impression lithographique présentant une capacité de formation d~image excellente et une bonne hydrophilie dans les parties ne comportant pas d~image et, en même temps, présente une excellente durabilité d~impression. La plaque originale pour lithographie comprend une couche photosensible comprenant un polymère hydrophile, un agent réticulant, des particules de polymère hydrophobes, et un agent de conversion photothermique. Le polymère hydrophile ne contient dans sa chaîne polymère sensiblement aucun groupe hydroxyle alcoolique ni carboxyle. Pas exemple, pas plus de 1,5% molaire de l'unité répétitive du polymère hydrophile ne contient un groupe hydroxyle alcoolique ou carboxyle.
Inatomi Yuji
Koide Akihiro
Kurihara Hiroyoshi
Sanada Takayuki
Terauchi Tomoya
Mitsui Chemicals Inc.
Smart & Biggar
LandOfFree
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