JPS60151638A - Dry two-component type diazo copying material - Google Patents

Abstract

PURPOSE:To enhance the image density, and to eliminate stains in development by providing a precoat layer contg. polyvinylidene chloride, etc. on a substrate, and furnishing a photosensitive layer consisting essentially of a diazo compd. and a coupling component on the precoat layer. CONSTITUTION:A coating liquid, prepared from polyvinylidene chloride, a polymer whose basic skeleton is constituted of said resin, and various kinds of additives, is coated on a substrate such as a film with the common coating method, and dried to provide a precoat layer of 0.1-5g/m<2>, for example. Then a coating liquid consisting of a diazo compd., a coupling component, and other assistants is coated on the precoat layer, and dried to provide a photosensitive layer. A dry two-component type diazo coupling material is obtained in this way. A vinylidene chloride.acrylic ester copolymer is used as the polyvinylidene chloride and the copolymer whose basic skeleton is constituted of said resin.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to diazo copying materials, particularly dry two-component diazo copying materials.

Prior art When photosensitive paper is dry developed, the photosensitive paper comes into contact with piano wire or a metal plate in the development box, and the photosensitive layer or precoat layer is peeled off, and subsequently, the applied material is applied to the piano wire, etc. Adhesion occurs, and stains caused by scratches or transfer of the deposits, so-called development stains, occur on the surface of the copy.

In particular, it has already been revealed that providing a precoat layer on the diazo copying material 1'11 is effective for improving the 8 degree image, and for this purpose, for example, polyethylene glycol with a molecular group of 3000 or more is used in the precoat layer. and development stains occur.

Purpose The present invention aims to improve image wetness and eliminate development stains by using specific pre-to-layers 1 to 1.

Structure The present invention relates to a diazo copying material comprising a photosensitive layer containing a diazo compound and a coupling component as main components on a support. The gist is a dry two-component type diazo copying material characterized by having a precoat layer containing at least one type of OJ.

Examples of polyvinylidene chloride and copolymers having polyvinylidene chloride as a basic skeleton used in the present invention include the following substances.

Vinylidene chloride-acrylic acid ester copolymer, vinylidene chloride-acrylonitrile copolymer, vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-acrylic acid ester-acrylic acid copolymer, vinylidene chloride-nisder acrylic acid-methacrylic acid copolymer Polymer.

A filler can be added to the precoat layer containing such a substance, if necessary. Fillers that can be used are commonly used fillers, such as silica particles,
Examples include organic and inorganic fillers such as starch, clay, alumina, calcium carbonate, urea-formalin resin particles, and styrene resin particles.

As the diazo compound and coupler used in the present invention, those conventionally used in the field of two-component diazo copying materials can be used as they are.

Therefore, as a diazo compound, for example, 4-diazo-1
-dimethylaminebenzene, 4-diazo-1-dimethylaminebenzene, 4-diazo-1-dipropylaminobenzene, 4-diazo-1-methylbenzylaminobenzene, 4-diazo-1-dibenzylaminobenzene, 4-diazo -1-ethylhydroxyethyla, minobenzene,
4-Diazo-1-diethylamino-3-methoxybenzene, 4-diazo-1-dimethylamine-2-methylbenzene, 4-diazo-1-benzoylamino-2,5-jethoxybenzene, 4-diazo-1- Morpholinobenzene, 4-diazo-1-morpholino-2,5-jethoxybenzene, 4-diazo-1-morpholino-2,5-dibutoxybenzene, 4-diazo-1-anilinobenzene,
4-Diazo-1-dimethylamine-3-carboxybenzene, 4-diazo-1-tolylmercapl=2.5-
Diazo compounds such as jetoxybenzene, 4-diazo-1,4-methI to pheasybenzoylamino-2,5-jethoxybenzene and metal halides of chloride (zinc chloride, 1B
Examples include double salts with cadmium oxide, cadmium chloride, and diazo compounds, and the diazo compounds of strong acids such as sulfuric acid, boron tetrafluoride, and hexafluorophosphoric acid, but are not limited to these, of course.

With a coupler () (,1, e.g. resorcinol, phloroglucin, 2,5-dimethyl-4-mo, lupodinomethylphenol, 3-hydroxycyanoacetanilide,
p-sulfoacetanilide, 1-benzoylamino-8
-hydroxynaphthalene-3,6-disulfonamide,
2.2-dihydroxynaphthalene, 2.7-dihydroxynaphthalene-3,6-sodium disulfonate, 2,3
-dihydroxy-6-sulfonic acid, sodium 2,5-dihydroxynaphthalene-6-sulfonate, sodium 1-hydroxynaphthalene-4-sulfonate, 1-amino-
3-Hydroxynaphthalene-3,6-disulfonamide, naphthol △S17tol △SD.

2-Hydroxynaphthalene-3-biguanide, 2-Hydroxydef 1-Podimorpholinobrobilamide, 2-
Hydroxynaphthoic acid ethanolamide, 2-hydroxynaphthoic acid-N-dimethylaminopropylamide hydrochloride, 2.2-. Examples include 4.4'-tetrahydroxysiftenyl, 2.2'', 4.4'-tetrahydroxydiphenyl sulfoxide, but are not limited thereto.

In the present invention, in addition to the above-mentioned materials, the conventional diazo copying material
; Various additives used in 1 can be used. For example, storage improvers such as 1-lium naphthalene monosulfonate, sodium naphthalene disulfonate, sodium naphthalene trisulfonate, sulfosalicylic acid, cadmium sulfate, magnesium sulfate, cadmium dihydride, zinc chloride, etc.; As ethylene glycol, triethylene gelicol, etc.; antioxidant 1V
Agents such as thiourea and urea; solubilizing agents such as caffeine and theophylline; acid stabilizers such as citric acid, tartaric acid, sulfuric acid, oxalic acid, boric acid, vA acid, and pyrophosphoric acid; can be added in small amounts. Further, an appropriate amount of inorganic and organic fine particles such as silica, starch, clay, and resin may be added to the photosensitive layer as an image density improver.

To prepare the diazo copying material of the present invention, firstly, a coating solution consisting of the above-mentioned binder and other additives is coated on a support such as paper or film by a conventional coating method and dried. A pre-coat layer of 0.1 q/m2 to 5 g/m2 is provided, and a coating liquid consisting of a diazo compound, a coupling component, and other auxiliary agents is applied and dried to form a photosensitive layer.
All you have to do is pull it.

Examples are shown below.

Example 1 A coating solution consisting of polyvinylidene chloride (50% water emulsion) 0111 silica fine particles 10 (I + 100 g of water) was applied to the surface of a base paper for diazo copying paper and dried to form a precoat layer of Ig/m2. Furthermore, on top of that, 4-diazo-1-dimethylaminobenzene・1/2 Zn C120,5!]2,3-dihyde[1xinaphthalene-6-sulfonic acid sodium 2q ritonic acid 211I''n zinc oxide 5g A coating solution consisting of 5 g of thiourea and 100 g of water was applied and dried to form a photosensitive layer of 1.0 g/m 2 to obtain a diazo copying material (sample A).

On the other hand, for comparison, the precoat was removed and silica fine particles equivalent to those in the silica layer of the precoat layer of Sample A were added to the photosensitive solution of Sample A formulation instead. B).

Furthermore, a diazo copying material was obtained in the same manner as Sample C) except that the same amount of milk cavin was added to the pre-solution of Sample A in place of Borisdylene.

Each sample obtained as described above-12 was 1
After developing 1000 sheets at a speed of 1α of 5 m/n+in, the presence or absence of kisses on each sample of the 1000th sheet and the presence or absence of dirt on the developing box were checked.

In addition, it can be seen that the color development temperature was measured using a microscopic autopsy, and the development stains of the present invention were significantly less than those of the comparative example.

Example 2 A coating solution consisting of vinylidene chloride-acrylic ester copolymer (45% water emulsion) 30Q silica fine particles iog water ioog was applied to the surface of a diazo paper base paper (2+ after drying on a ζ cloth)/1112 A pre-coat layer was applied.

On top of that, 2,5-jethoxy-4-morpholinobenzene diazonium chloride 1/27n C122! ] 2-Hydroxy-3-naphthoic acid morphology,/propylamide 2.5Q zinc chloride 1
．． A coating solution consisting of 5 g of Bu', A urea, 1.50 g, tartaric acid, 2 g, ethylene glycol, 2 g, and 100 g of water was applied to the surface of a diazo copying base paper and dried to provide a photosensitive layer. The obtained diazo copying material was used in Example 1.
When development was carried out in the same manner as above, a clear high-density blue image was obtained.

Further, no development scratches or stains inside the development box were observed.

On the other hand, for comparison, when a diazo copying material was prepared and developed using the same amount of polyacid-resistant vinyl instead of the vinylidene chloride-acrylic acid copolymer in the precoat layer, there were no scratches or defects in the developing box. stains were observed.

Example 3 A coating solution consisting of 25 g of vinylidene chloride-nisder acrylate-acrylic acid copolymer (50% water emulsion), 10 g of urea-formalin resin fine particles, and 100 g of water was coated on the surface of a base paper for diazo copying paper and dried. (A precoat layer of 1/m 2 was provided. Furthermore, the photosensitive layer of Example 1 was provided on top of it.
′! I got 1. When the obtained zumble was developed in the same manner as in Example 1, a high-density blue image was obtained, and no scratches or stains were observed in the developing box.

Effects As is clear from the above examples, the product of the present invention has high image density and little image staining.

Patent applicant Rico Co., Ltd. Agent Patent Attorney Hidetake Komatsu Agent Patent Attorney Hiroshi Asahi

Claims (1)

[Claims] In a diazo copying material in which a photosensitive layer containing a diazo compound and a coupling component as main components is disposed on a support, at least one member selected from polynylidene chloride and a copolymer having this as a basic skeleton. A dry two-component type diazo copying material characterized by having a precoat layer containing and covering it.