SU31763A1 - Method of making photosensitive papers by means of diazocompounds - Google Patents

Description

For the manufacture of photosensitive papers, it is proposed to apply onto the base or substrate a solution of a stable compound of aromatic diazoniums of the secondary and tertiary amines and their derivatives, along with hydroxy derivatives of the aromatic series. After being irradiated under the negative of such paper, an image of an alkaline or gaseous developer is developed.

The compounds of the diazonium aromatic series of secondary and tertiary amines and their derivatives with aromatic oxy derivatives have been found to be highly sensitive to light. This property can be used to produce photosensitive papers and films.

A solution of the compound obtained by the reaction between the diazo compound and the hydroxy derivative is applied in the presence of acidic agents on paper or another suitable substrate and dried at 60-70.

After illumination under the drawing or positive, the paper is treated with ammonia vapors or aqueous alkali, in which the dye is formed in unlit areas and a positive image is obtained.

(OF)

The proposed method for producing photosensitive layers has the advantage over conventional diazoins; that only one substance is injected into the layer, which is sufficient to form an image.

In addition, these compounds are much more resistant than free diazones, decomposing antioxidants and heavy metal salts.

Example. 9 g of a compound of p-diazodnophenylamine with 2 naphthol-6 sulfonic acid and 22 g of sodium bisulfate dissolved with slight heating in a liter of water, are applied. the substrate and dried. After illumination under the drawing and the action of the alkaline agent, a dark brown image is obtained on a light background.

Example 2. 111 p-diazodiphenylamine compounds with 2 naphthol-3, 6 disulfonic acid and 17 g of sodium bisulfate are dissolved with weak heating in a liter of water and dried. After illumination and appearance of the alkaline agent, a dark blue image is obtained against a light background.

Example 3. 12 g of p-diazodiphenylamine compound with 1-acetyl-amino-8 naphthol 3, 6 disulfonic acid, 18 g of acidic sodium salt are dissolved in 1000 kg / b. cm.

water at 40-50 ° and applied to the substrate. After illumination and appearance with an alkaline agent, a blue image is obtained on a white background.

Example 4. 24 g of p-ethoxy-p-diazodiphenylamine compound with 2 naphthol 3, 6 disulfonic acid and 13 g sodium bisulfate is dissolved in 1000 cubic meters. cm water at. The solution is applied to the substrate and dried. A layer illuminated and shown to be an alkaline agent gives a deep blue image over a white background.

Example 5. 12.5 g of p-diazodimethylaniline compound with 2, 7 dioxynaphthalene and 45 g of sodium bisulfate are dissolved

in a liter of water at 60 and applied on a substrate. The resulting photosensitive layer gives brown images on a white background.

The subject matter of the invention.

A method of making photosensitive papers by means of diazo compounds, characterized in that a solution of a stable compound of an aromatic diazonium of a series of secondary and tertiary amines and their derivatives together with aromatic oxy derivatives is applied on the paper.