# US 5,344,739 A · Photosensitive diazo resin composition for lithographic printing utilizing a xanthene dye having an anion group as the counter ion of the diazonium group

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- Number: US 5,344,739 A
- Document ID: US5344739A
- Status: Granted
- Kind: A
- Application number: 07/969,962
- Filed: 1992-11-02
- Granted: 1994-09-06
- Earliest claimed: 1992-11-01
- Assignees: Nippon Paint Co., Ltd.
- Inventors: Kazunori Kanda; Osamu Nanba; Edward Lam
- Web page: https://patentgrep.com/patent/US5344739A

## CPC

- G03F 7/016: Diazonium salts or compounds (G03F7/075 takes precedence)
- G03F 7/021: Macromolecular diazonium compounds; Macromolecular additives, e.g. binders {(G03F7/0166 takes precedence)}
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)

## Abstract

A photosensitive diazo resin-containing photosensitive resin composition for lithographic printing comprising a sensitizing dye having an anion group in a molecule as a counter ion of a diazonium group.

## Claims

### Claim 1

A photosensitive diazo resin-containing photosensitive resin composition for lithographic printing comprising a xanthene dye having an anion group in a molecule as a counter ion of a diazonium group.

### Claim 2 (depends on 1)

The photosensitive resin composition for lithographic printing according to claim 1, wherein the xanthene dye is acidic.

### Claim 3 (depends on 1)

The photosensitive resin composition for lithographic printing according to claim 1, wherein the xanthene dye is selected from the group consisting of Erythrosine, Eosine Y, Rose Bengal, Fluorescein, Uranine and Sulfo Rhodamine.

### Claim 4 (depends on 1)

The photosensitive resin composition for lithographic printing according to claim 1 which further comprises a binding amount of a binder resin.

### Claim 5 (depends on 1)

The photosensitive resin composition for lithographic printing according to claim 1 which further comprises a coloring amount of an image colorant.