JPS62290002A - Manufacture of semiconductor device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Industrial Field of Application The present invention relates to a method of forming a white diffusion film for a light bulb, particularly a method for forming a white diffusion film for a light bulb, which has a light bulb cap, and has a non-linear shape together with a ballast and a lighting tube. This invention relates to a method for forming a white diffusion film on the inner surface of an outer globe of a compact fluorescent lamp with a built-in fluorescent tube.

BACKGROUND OF THE INVENTION Fluorescent lamps have traditionally been used in large quantities not only in factories and shops but also in homes because of their higher lamp efficiency than incandescent light bulbs. However, most fluorescent lamps are linear or annular in shape, and are larger than light bulbs.They also require a ballast and lighting tube, which makes the entire device difficult to use. It has problems such as being large and complicated to handle.

In recent years, in order to solve this problem and to save power, fluorescent tubes have been shaped into a U-shape or a double-U shape.
Many compact fluorescent lamps have been proposed in which the lighting tube and ballast are integrated and built into a glass globe. In this case, a white pigment layer is coated on the inner surface of the glass globe to uniformly diffuse the light from the fluorescent tube. The white pigment can be applied using a suspension in which the white pigment is dispersed in an organic solvent containing a binder such as nitrified cotton, or a suspension in water containing an aqueous polymer resin. It has been known.

Among these formation methods, the former method uses a suspension of a white pigment dispersed in an organic solvent containing nitrified cotton, and when the formed diffusion film is irradiated with ultraviolet rays emitted from a fluorescent lamp for a long time, it turns yellow. It has been found that there is a problem in that the lamp is colored, the appearance is impaired, and the luminous flux of the lamp is also significantly reduced. Furthermore, since organic solvents are used, there are many problems in terms of adverse effects on the human body and operational safety.

On the other hand, as the latter method, a method of forming a white diffusion film using a suspension using water as a solvent and an acryl-silica composite particle emulsion of an aqueous polymer resin as a binder has been proposed. Since this method uses water as a solvent, there is no adverse effect on the human body, and it is highly safe in the workplace, and the film obtained after drying is adhesive.

It has the advantage of being particularly weather resistant. In other words, since the film obtained by drying has excellent weather resistance, it was confirmed that it did not discolor even when exposed to ultraviolet rays emitted from fluorescent tubes for a long time.

Problems to be Solved by the Invention However, when the lamp is repeatedly flashed with water attached to the surface of the diffusion membrane, taking into consideration the usage conditions at high temperature and high humidity, the diffusion membrane peels off in the area where water is attached. It was discovered that there is a serious problem.

Means for Solving the Problems The present invention involves coating the inner surface of a glass globe with an aqueous solution of a silane coupling agent having a methacryloxy group as a functional group that reacts with an organic substance, drying the solution to form a coating made of the silane coupling agent, and applying a coating on the coating. A white diffusion film is formed by applying and drying a suspension containing a white pigment, a silica-acrylic composite particle emulsion, and a nonionic surfactant.

The -OR group in the silane coupling agent (a functional group that bonds with inorganic materials such as glass, such as methoxy and ethoxy groups) forms an oxane bond (M-〇-8) with the glass surface through hydrolysis.
i) (M is an inorganic substance such as glass) is produced, while a functional group (methacryloxy group) that reacts with an organic substance such as a resin in the silane coupling agent reacts with an organic substance (acrylic resin) in the silica-acrylic composite particle emulsion. As a result, the film made of the silane coupling agent forms a bridge between the glass and the film made of the white pigment, and the white diffusion film is firmly adhered to the glass surface.

Examples Example 1 ・3-methacryloxypropyltrimethoxysilane g (trade name Cyla Ace S-71O, manufactured by Chisso Corporation)・
Deionized water 1000g After thoroughly mixing the above materials with a stirrer, the inner diameter is 95nvn.
70℃, 500m
f! Dry with warm air at 1/2 seconds to form a silane coupling agent film.

Next, - Calcium phosphate 1000g - Silica acrylic composite particle emulsion 1500g (40%
Concentration) ・Nonionic surfactant 10+nf! (
10% aqueous solution) After thoroughly stirring the above materials with a stirrer, pass through a 300 mesh sieve to prepare a suspension.

Using this suspension, 1.1 g of the suspension was applied to the inner surface of a glass globe on which a film made of the silane coupling agent was formed. Drying was performed at 70° C. with hot air at 5 oolIle/sec. Thereafter, a 13 watt double U-shaped fluorescent tube was installed in the globe along with a ballast and a lighting tube, and 5 µm of water was simultaneously filled to confirm the water resistance, thereby producing a compact fluorescent lamp. When this compact fluorescent lamp was subjected to a lighting test with a blinking cycle of being on for 2.5 hours and off for 30 minutes, no peeling of the film occurred at all.

On the other hand, a compact fluorescent lamp manufactured using a glass globe having a white diffusion film formed by coating and drying the above suspension on a glass globe that does not have a coating made of a silane coupling agent is as described above. As a result of conducting a lighting test under the same lighting conditions as above, it was found that after 100 to 150 hours of lighting, the white diffusion film in the area where water was attached had completely peeled off from the glass surface.

Example 2 ・3-methacryloxypropyltrimethoxysilane g (trade name Sila Ace S-710, manufactured by Chisso Corporation)・
1000g of deionized water After thoroughly mixing the above materials with a stirrer, apply to the inner surface of a cylindrical glass globe with a tube diameter of 75mm, and heat at 70°C for 500+n.
A silane coupling agent film was formed by drying with warm air at e/sec.

Next, - 200 g of zirconium silicate, 800 g of aluminum silicate, 1500 g of silica-acrylic composite particle emulsion (40% concentration) - 10% aqueous solution of nonionic surfactant 10n+e After stirring the above materials for 5 minutes with a stirrer, Prepare the suspension by passing it through a 300 mesh sieve.

Using the prepared suspension, 1.
After applying 1gr, dry with warm air at 70°C and 500me/sec. Thereafter, a 13 watt, double U-shaped fluorescent tube was installed in the globe along with two ballast lighting tubes, and 5 cc of water was sealed at the same time to confirm water resistance, thereby producing a compact fluorescent lamp. When this compact fluorescent lamp was subjected to a lighting test with a blinking cycle of being on for 2.5 hours and off for 30 minutes, no peeling of the film occurred at all.

On the other hand, a light bulb-shaped fluorescent lamp was manufactured using a glass globe having a white diffusion film formed by coating and drying the above suspension on a glass globe that did not have a coating made of a silane coupling agent. As a result of conducting a lighting test under the same lighting conditions as above, it was found that after 100 to 150 hours of lighting, the white diffusion film in the areas where water had adhered had completely peeled off from the glass surface.

As described in detail, the present invention provides a novel bulb that has particularly strong adhesion with respect to the white diffusion film formed on the inner surface of the glass globe, and does not peel off even when flashing with water attached. It is possible to provide a method for forming a white diffusion film for use, and its practical effects are extremely large.

Claims (1)

[Claims] An aqueous solution of a silane coupling agent having a methacryloxy group as a functional group that reacts with an organic material is applied to the inner surface of the glass globe, and dried to form a film made of the silane coupling agent.A white pigment, a composite silica-acrylic resin emulsion, and a surfactant are applied on the film. A method for forming a white diffusion film for a tube, the method comprising forming a white diffusion film by applying and drying a suspension consisting of an agent.