KR840000559B1 - Photosensitive composition - Google Patents

Abstract

A photosensitive compsn. is prepd. from aromatic diazonium salt, used as a photosensitive agent, and cationic surfactant, such as lauryl betaine or stearyl betaine. The configuration of the particulate coating layer is formulated by an exposure method using the difference of particulate hold-up capacity between the exposure and non-exposure parts. The following figs. are schematic diagrams for color TV fluorescent surface manufacture.

Description

Photosensitive composition

1 (a) to 1 (d) are manufacturing process diagrams of the color water pipe fluorescent surface for explaining the present invention by the optical bonding method.

TECHNICAL FIELD The present invention relates to a photosensitive composition to be used when forming a powder-coated layer in the shape of a shape by an exposure method on a fluorescent surface of a color receiving tube, particularly a color water pipe.

Conventionally, the fluorescent surface of a color water pipe | tube is formed by using the photocurability of the photosensitive resin, and apply | coating so that it may be normally rinsed regularly in the form of the point or stripe of the phosphor which light-emits green, blue, and red respectively.

In other words, the so-called phosphor dough, in which a phosphor was suspended in a solution of polyvinyl alcohol containing dichromate, was applied to the inner surface of the panel, dried to form a photosensitive film, and then the desired portion of the film was irradiated with ultraviolet light through a shadow mask. The exposed part was made insoluble in the developer (in this case, hot water), and the non-exposed part was removed by hot water washing, and the fluorescent surface of the desired emission color was applied to the inner surface of the panel in a desired position and shape.

However, this manufacturing process has a drawback that the process becomes extremely complicated because it requires a repetitive process such as several times of kneading, washing with water and drying.

Therefore, in order to solve such a conventional manufacturing process (hereinafter referred to as a kneading method) which is complicated and requires a large amount of water, salt, organic solvent, etc., the photodegradable component of the aromatic diazonium salt has a powder particle capacity. have.

That is, a method of forming a powder coating layer corresponding to an exposed figure by using a thin layer of a photosensitive composition containing an aromatic diazonium salt as a photosensitive component exhibiting a difference in powder capacity between the exposed portion and the non-exposed portion. This has been proposed.

1 (a) to 1 (d) show the manufacturing process of the fluorescent surface of the color receiver tube using the exposure of the thin layer of photosensitive composition and the powder capacity difference between the non-exposed parts.

First, as shown in the drawing (a), a thin layer 2 of a photosensitive composition having a diazonium salt as a photosensitive component is formed on the screen portion of the color water pipe, that is, the inner surface of the panel 1.

In this case, the thin layer forming material is dissolved in an organic solvent such as water or alcohol, applied to the panel 1, and dried to form a thin layer.

Next, the thin layer 2 is irradiated with ultraviolet rays through a shadow mask.

At this time, the position irradiated with ultraviolet rays through the hole of the shadow mask is a position to be applied to the first phosphor, for example, a green light emitting phosphor.

In the thin layer 2 of the part which received this ultraviolet irradiation, the substance which has powder accommodation capability is produced | generated according to the photolysis reaction of a diazonium salt. When the phosphor particles are sprayed and contacted on the surface of the thin layer 2 thus formed, the phosphor particles adhere to the thin layer of the portion irradiated with ultraviolet light according to the phosphor capacity of the thin layer, and the remaining phosphor particles blow air. A first phosphor coating layer, for example, a green light emitting phosphor coating layer 3, is formed on the thin layer 2 of the portion subjected to ultraviolet irradiation as shown in FIG. .

Next, as shown in the drawing (c), a second phosphor coating layer, for example, a blue light emitting phosphor coating layer 4 is formed by the same operation. In addition, the third phosphor coating layer 5 is formed as shown in the drawing (d) by the same operation.

In this way, a fluorescent surface coated at a position where the three-color phosphor emits respective colors is illuminated.

In this case, as the diazonium salt to be used, an aromatic diazonium salt having an intrinsic decomposition by an optical ancestor is suitable, and a stabilized diazonium salt is particularly useful practically.

Moreover, when forming the photosensitive thin layer which uses a diazonium salt as a photosensitive component, in order to improve the uniformity of a thin layer, it is added with organic polymer materials, such as polyvinyl alcohol or alginate propylene glycol ester, and various various red surfactants. Is already proposed.

The above method is called light deposition method (about the kneading method). As described above, the light-adhesive method is significantly simpler than the kneading method, and furthermore, the fluorescent surface coating of the color water pipe can be performed only by using a very small amount of water.

However, the thin film of the photosensitive composition by the light adhesion method has a drawback that the exposure sensitivity is lower than that of the photosensitive film by the kneading method, and the fog phenomenon that the powder phosphor adheres to the unexposed areas due to scattering of light is likely to occur. There was a flaw.

Accordingly, an object of the present invention is to focus on the above point, and to further reduce the exposure time or the amount of exposure, and to eliminate the occurrence of fog phenomenon, the photosensitive composition which can facilitate the formation of the fluorescent surface of the improved quality of the waterborne tube To provide.

In order to achieve the above object, the photosensitive composition according to the present invention prevents the occurrence of the blasting of the photosensitive modifier thin film layer and improves the sensitivity by adding a zwitterionic surfactant to the photosensitive composition containing the diazonium salt. It is.

Next, the present invention will be described.

MEANS TO SOLVE THE PROBLEM The present inventors added and examined various additives to the composition containing a diazonium salt as a photosensitive component, in order to be able to apply said photo-adhesiveness actually to a manufacturing process, and, as a result, the fluorescent surface which satisfy | fills the requirements in the said image quality surface To form by phototacking, it was found that the addition of the zwitterionic surfactant is effective.

That is, since the lauryl betaine and the stearyl betaine are used as the material of the zwitterionic surfactant to be added to the photosensitive composition to be used in the photo-adhesive method, the occurrence of fog phenomenon required for the production of a fluorescent screen capable of obtaining a good screen as a color water pipe can be obtained. Prevention and improvement in sensitivity are obtained.

The following examples will be described in more detail.

Example 1

First, an aqueous solution having the following composition 1 was applied to the inner surface of the 14-inch panel by a rotary coating method and dried by infrared heating to form a photosensitive thin layer having a thickness of 0.6 mu.

The photosensitive thin layer was then irradiated with light having an intensity of about 18 w / m ² from an ultra-high pressure mercury lamp to a position to be applied to the green phosphor through a shadow mask for about 90 seconds.

Next, a green luminescent phosphor was applied to the surface of the photosensitive thin layer by spraying.

That is, the phosphor powder was sprayed onto the thin layer surface, the phosphor powder was attached to the exposed portion of the thin layer, and the remaining phosphor was removed by an air sprayer. This makes it possible to obtain a phosphor stripe width and to prevent the occurrence of fog shapes.

In addition, in the photosensitive thin layer of the conventional composition from which aryl betaine was removed in composition 1, the light irradiation time required to obtain the same phosphor stripe width is about 120 seconds.

By adding lauryl betaine, the exposure time or exposure amount for forming the phosphor stripes was about 2/3, and the level of fog development could be improved.

Example 2

In the same manner as in Example 1, the aqueous solution of composition 2 was applied to form a photosensitive thin layer having a thickness of 1 μm.

The photosensitive thin layer was irradiated with light having an intensity of about 18 w / m ² in an ultra-high pressure mercury lamp for about 90 seconds through a shadow mask.

Next, a green luminescent phosphor was applied to the surface of the photosensitive thin film layer by spraying to obtain a phosphor stripes of about 180 μm in width, and also to prevent fog phenomenon.

In addition, in the photosensitive thin layer which is the conventional composition, the light irradiation time required to obtain the same phosphor stripe width is about 120 seconds.

By adding stearylbetaine, the exposure time to the exposure amount for forming the phosphor stripes was about 2/3.

There was also a big difference in the degree of fog. In addition, although lauryl betaine and stearyl betaine were used independently in the said Example, it can also be used in mixture, and it goes without saying that it is effective even if it mixes with other surfactant.

In addition, it has been found that the amphoteric surfactant has good sensitization effect in the range of 0.01% by weight to 15% by weight with respect to the aromatic diazonium salt, and also improves the prevention of fog phenomenon. When the added amount was less than 0.01% by weight, the effect of sensitization and reduction of fog was not obtained, and when the amount exceeded 15%, the adhesion of the phosphor was changed and the weight of the film was not tended to decrease. Therefore, a favorable sensitization effect and improvement of brightness can be aimed at in the range of 0.01-15 weight%, Furthermore, what is optimal at 0.02-11.0 weight% is obtained.

As described above, according to the photosensitive composition according to the present invention, by adding an amphoteric surfactant, it is possible to reduce the exposure time and the exposure amount for forming the phosphor rare, and to prevent the occurrence of fog. It is extremely excellent that it is easy to form and can greatly improve weak acidity.

Claims (1)

Applying a composition thin layer containing an aromatic diazonium salt as a photosensitive component on the surface of the substrate to form a powder-shaped powder coating layer by the exposure method by using a difference in powder capacity between the exposed portion and the non-exposed portion. The photosensitive composition, wherein a photoionic composition is added to the photosensitive composition.

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