US 5,498,502 A · Negative charging type printing photosensitive resin composition

Abstract

The present invention provides an electrographic printing photosensitive resin composition, which exhibits a good photosensitivity in a negative corona charging system and is useful for a laser platemaking system using semi-conductor laser light within a near infrared range as a light source. Disclosed is a negative charging type printing photosensitive resin composition comprising a phthalocyanine compound (a), a mercaptoarylimidazole (thiazole) compound (b) and, if necessary, a compound selected from the group consisting of a condensed polycyclic quinone compound, a bisazo compound, a cyanine compound, a quinacridone compound and a mixture thereof (d), said compounds being dispersed in a binder resin (c). A printing photosensitive resin plate using the photosensitive resin composition is also disclosed.

Claims9

Dependent claims

A negative charging type printing photosensitive resin composition comprising:

(a) a phthalocyanine compound;
(b) at least one compound represented by the formula (I) or (II):
##STR10## wherein Y and Z respectively indicate an imino group or a sulfur atom;
R.sup.1 and R.sup.2 are the same or different and indicate a hydroxyl group, an alkyl group having 1 to 4 carbon atoms and a halogen atom;
and m is an integer of 0 to 2;
and
(c) a alkali soluble binder resin.

4 more elements

Dependencies are inferred from the claim text.

Negative charging type printing photosensitive resin composition

Life of this patent

Negative charging type printing photosensitive resin composition

Life of this patent

Abstract

Claims9