Positive working photosensitive lithographic printing plate util

Details Positive working photosensitive lithographic printing plate util Positive working photosensitive lithographic printing plate util

1994-08-26

1995-10-24

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

430191, 430192, 430271, G03F 7023

Patent

active

054609178

ABSTRACT:
A positive working photosensitive lithographic printing plate comprising a support having thereon a photosensitive layer comprising a positive photosensitive composition, wherein the positive photosensitive composition comprises a mixture of (a) a phenol derivative, (b) a water-soluble and aqueous alkali-soluble resin, and (c) o-quinonediazide or a mixture of a compound capable of forming an acid on exposure and a compound having at least one C--O--C group which is decomposable with an acid, and wherein the phenol derivative is a mixture of a compound represented by the following formula (I) and a compound represented by the following formula (II): ##STR1## wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5 and X.sup.6 are the same or different and each represents --CH.sub.2 OH or a hydrogen atom, provided that at least three of them are each --CH.sub.2 OH; ##STR2## wherein Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4, Y.sup.5 and Y.sup.6 are the same or different and each represents --CH.sub.2 OCH.sub.3, --CH.sub.2 OH or a hydrogen atom, provided that at least three of them are each --CH.sub.2 OCH.sub.3 or --CH.sub.2 OH, and at least one of the three is --CH.sub.2 OCH.sub.3.

REFERENCES:
patent: 4387152 (1983-06-01), Stahlhofen
patent: 5112719 (1992-05-01), Yamada et al.
patent: 5238775 (1993-08-01), Kajita et al.
patent: 5340686 (1994-08-01), Sakaguchi et al.

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