PS plate for use in making lithographic printing plate requiring

Details PS plate for use in making lithographic printing plate requiring PS plate for use in making lithographic printing plate requiring

1990-07-27

1992-06-30

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430306, 430271, G03C 176

Patent

active

051262282

ABSTRACT:
The present invention relates to a presensitized plate for use in making a lithographic plate requiring no dampening water and comprising, on a support, a light-sensitive resin layer and a silicone rubber layer, in this order, wherein the silicone rubber layer is crosslinked by addition reaction of an .fwdarw.SiH group with a --CH.dbd.CH-- group and wherein the light-sensitive resin layer comprises: (1) a monomer or oligomer having at least one photopolymerizable or photo-crosslinkable and olefinically unsaturated double bond, (2) an organic solvent-soluble polyurethane resin having a glass transition temperature of 20.degree. C. or below and being capable of forming a film, and (3) a photopolymerization initiator. According to the present invention, the PS plate has excellent image-forming properties and printing properties.

REFERENCES:
patent: 3894873 (1975-07-01), Kobayashi et al.
patent: 3953212 (1976-04-01), Miyano et al.
patent: 4086093 (1978-04-01), Ezumi et al.
patent: 4342820 (1982-08-01), Kinashi et al.
patent: 4743527 (1988-05-01), Yoshida et al.
patent: 4755445 (1988-07-01), Hesegawa
patent: 4874686 (1989-10-01), Urabe et al.

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