JPH05163174A - Ultraviolet-ray cutting glass for vehicle - Google Patents

Abstract

PURPOSE:To provide the subject glass having scratch resistance, durable to reinforcing and/or bending processing, also capable of transmitting electrical radiation. CONSTITUTION:The objective ultraviolet-ray cutting glass can be obtained by providing an ultraviolet-ray cutting film like zinc oxide film on a glass followed by coating thereon a solution of a CH3-Si or Si-N bond-bearing compound and then baking to form a protecting film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light blocking glass, and more particularly to an ultraviolet blocking glass for vehicles.

[0002]

2. Description of the Related Art 400 nm of sunlight reaching the surface of the earth
The following rays are ultraviolet rays. This ultraviolet ray is UVA
(400-315nm), UVB (315-290n)
It is classified into m). When ultraviolet rays are absorbed by the human body, sunburn may occur, or melanin pigment may be deposited to cause spots and freckles. It is said that ultraviolet rays cause aging of the skin due to changes in elastic fibers of the skin due to repeated irradiation. Further, when the resin or the fibers are irradiated with the ultraviolet rays, their fading or deterioration occurs.

In the passenger compartment of an automobile, part of UVB is absorbed by the glass, but part of it reaches the passenger compartment,
UVA has all arrived. As a result, the resins and fibers used in the interior parts of automobiles are faded and deteriorated. It also causes sunburn on the skin of the occupants. In order to prevent these, glass that blocks ultraviolet rays is required.

As a conventional ultraviolet blocking glass, a method of alternately laminating multiple materials having different refractive indexes on a transparent substrate such as glass, a method of forming a thin film by vapor deposition of metal or metal oxide, or an ultraviolet absorber is used. Known methods include a method of dissolving or dispersing in a binder and applying the solution, a method of containing a substance such as zinc sulfide that absorbs ultraviolet rays in glass, and the like.

Japanese Laid-Open Patent Publication No. 57-56350 discloses a glass to be mounted on a window side of a vehicle, and one of glass selected from titanium oxide, cerium oxide, silicon oxide, zinc sulfide and zirconium oxide on a side surface of the vehicle interior. An ultraviolet light shielding glass for vehicles having an ultraviolet light shielding film made of a material is disclosed. Japanese Utility Model Laid-Open No. 60-52939 discloses an ultraviolet light shielding film made of one kind of titanium oxide, vanadium oxide and chromium oxide. A glass plate having is disclosed. Also,
JP-A-2-283639 discloses that Ti and / or Zr is formed on a metal film mainly composed of a metal selected from elements with atomic numbers 22 to 28 in the periodic table or an alloy thereof.
Disclosed is an ultraviolet-shielding glass, a heat-ray shielding glass, and a rear-view mirror plate glass for an automobile, which is characterized by forming an Al alloy containing Al and performing quenching treatment or bending treatment at a temperature of 580 ° C to 680 ° C.

Further, JP-A-3-223111 discloses a method in which zinc oxide is used as an ultraviolet absorbing film and the outside thereof is covered with a protective film of silicon oxide, zirconium oxide or titanium oxide.

[0007]

However, in the conventional method described in detail above, there is a problem that the throughput is low and the cost is high, for example, by the vapor deposition method. The method of dissolving or dispersing the ultraviolet absorber in some binder and applying it can be used only for laminated glass, and cannot be used for so-called single glass made of one glass such as a side window of an automobile. There was a problem. The method of incorporating zinc sulfide or the like into glass has a problem that it is difficult to prepare glass and uniform performance cannot be obtained at low cost.
There is also a problem that absorption at a preferable wavelength cannot be obtained depending on the kind of binder, ultraviolet absorber, thin film material, material added to glass, and the like.

Further, in the methods disclosed in Japanese Patent Laid-Open No. 57-56350 and Japanese Utility Model Laid-Open No. 60-52939, the ultraviolet blocking film is exposed on the surface and is easily scratched or scratched when the window is moved up and down. There is a problem that it is easy to occur and it is difficult to mount it on a vehicle.

In order to solve this problem, Japanese Unexamined Patent Publication No.
In Japanese Patent No. 223111, zinc oxide is used as an ultraviolet absorbing film,
A method of coating a protective film of silicon oxide, zirconium oxide or titanium oxide on the outside has been proposed. However, the veneered glass to be mounted on the vehicle requires tempered glass to ensure the safety of passengers, and depending on the shape of the vehicle, the window needs to have a curved shape. Treatment is required, and in the treatment, it is generally difficult to avoid the occurrence of cracks due to the difference in thermal expansion coefficient.

On the other hand, in the method disclosed in Japanese Patent Laid-Open No. 283639/1990, a radio wave cannot be transmitted due to the metal film, and the mobile phone cannot be used in the passenger compartment of the vehicle.
There was a problem.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. The first object of the present invention is that the window is durable and resistant to scratching and rubbing. Provided is an ultraviolet blocking glass for a vehicle, which has excellent scratch resistance. Secondly, the present invention provides an ultraviolet blocking glass for vehicles, which is free from cracks and film peeling in the strengthening process and the bending process. Thirdly, the present invention provides an ultraviolet blocking glass for a vehicle through which radio waves are transmitted into the vehicle interior of the vehicle. Further, the present invention provides an inexpensive, large-area, ultraviolet ray blocking glass for vehicles.

[0012]

DISCLOSURE OF THE INVENTION The inventors of the present invention have formed an ultraviolet blocking glass for vehicles, characterized in that the glass is strengthened and / or bent, and at least one ultraviolet blocking film is formed on the glass. And forming a layer containing silicon on the outside, and more preferably, the layer containing silicon is formed by applying a compound having at least a CH ₃ —Si bond and / or a compound having a Si—N bond. It has succeeded in achieving the above-mentioned object by the glass made of the above.

The present invention will be described in detail below. The ultraviolet blocking film used in the present invention blocks ultraviolet rays having a wavelength of 400 nm or less, and any film can be used as long as it satisfies this condition, but ZnO and Ti are preferable.
It is composed of a thin film containing at least one of O ₂ , CeO ₂ , Fe ₂ O ₃ , CoO or a composite oxide thereof. These thin films can be formed by any means such as a vacuum film forming method such as sputtering, vapor deposition and chemical vapor deposition, or a wet method such as a sol-gel method.

Preferably, a thin film is formed by applying a solution containing an organometallic compound or by applying a solution obtained by hydrolyzing an organometallic compound to form a sol, followed by baking.

The method of hydrolyzing such an organometallic compound to form a sol is generally called a sol-gel method. The method of forming a thin film by the sol-gel method is, for example, “Glass-ceramics manufacturing technology by the sol-gel method and its application” (Yamane Masayuki, Applied Technology Publishing 1989
Year) 108-140 pages.

The metal organometallic compound used in the present invention is preferably a metal alkoxide, a metal complex coordinated with β-diketone or a derivative thereof, a metal complex coordinated with a carboxylate ion or a derivative thereof, and a metalloxane compound. .. The metal alkoxide is represented by the general formula M (OR) _n . Here, n is an integer and represents the coordination number of the alkoxyl group, and is generally 1-8. R is selected from any alkyl group. Examples of R include a methyl group, an ethyl group, a propyl group, an isopropyl group, and a butyl group. R may be the same or different.

The metal complex coordinated with β-diketone, carboxylate ion or a derivative thereof is represented as ML _m or its polynuclear structure. Here, m represents the coordination number of β-diketone, carboxylic acid and their derivatives, and is generally 1 to
8 L represents a β-diketone, a carboxylate ion or a derivative thereof. L can be arbitrarily selected from β-diketone, carboxylate ion and its derivative.
L may be the same or different. For example, β-diketone and its derivatives are preferably acetylacetone, trifluoroacetylacetone, hexafluoroacetylacetone, dibenzoylmethane, benzoylacetone and the like.

As the carboxylate ion and its derivative, acetate ion, salicylate ion, lactate ion, butyrate ion, propionate ion, caproate ion, lactate ion and the like are preferably used.

In the present invention, an arbitrary ligand can be added to increase the stability of the organometallic compound or control the hydrolysis rate. The ligand can be arbitrarily selected from those capable of forming a complex with the metal ion used. Preferably, it can be arbitrarily selected from diols, ethers thereof, hydroxyketones, β-diketones, derivatives thereof, carboxylic acids and derivatives thereof. Specifically, 2
-(2-methoxyethoxy) ethanol, 2- (2-ethoxyethoxy) ethanol, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol monomethyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, triethylene glycol dimethyl ether, 2- (2-Methoxypropyl) ethanol, 2- (2-ethoxyethoxy) propanol, etc. are preferably used. Preferred hydroxyketones are acetone alcohol, acetoin, diacetone alcohol, benzoin and the like. β-diketone and its derivatives include acetylacetone, trifluoroacetylacetone, hexafluoroacetylacetone,
Dibenzoylmethane, benzoylacetone and the like are preferably used. As the carboxylate ion and its derivative, acetate ion, salicylate ion, lactate ion, butyrate ion, propionate ion, caproate ion, lactate ion and the like are preferably used.

When the ultraviolet blocking film in the present invention is formed by the sol-gel method, any metal nitrate, sulfate, halide salt or perchlorate can be used simultaneously with other organometallic compounds. When combined, the ratio of metal ions may be arbitrary.

In the sol-gel method of the present invention, the amount of the organic compound added to control the stability and hydrolysis rate of the organic metal compound is preferably 0.1 to 10 in terms of molar ratio to all metal ions. Alternatively, water may be added to hydrolyze the organometallic compound to form a sol. The amount of water may be arbitrary, preferably 1 to 10 with respect to the metal ion.
It is a double molar amount. Alternatively, an acid may be added when forming a sol. As the acid, nitric acid, hydrochloric acid, acetic acid, sulfuric acid and the like are preferable. The reaction temperature may be arbitrary, but is preferably 20.
-80 ° C. Any solvent may be used as long as it can dissolve these compounds, but alcohols such as methanol, ethanol, propanol, butanol, ethoxyethanol are preferably used.

In the present invention, it is also preferable to use a metal fatty acid salt for forming the ultraviolet blocking film. The metal fatty acid salt is represented by the general formula M (C _x H _y COO) _n . M can be arbitrarily selected from those that block ultraviolet rays as an oxide, but at least one of zinc, titanium, cerium, iron and cobalt, or a combination thereof is preferable. n represents the valence of the metal. C _x H _y COO, x is 3 to 23, y is 7-4
Those having saturated or unsaturated fatty acid groups in the range of 7 are preferable. As the fatty acid, 2-ethylhexanoic acid, naphthenic acid, oleic acid, elaidic acid, sorbic acid, stearic acid, and aragic acid are preferably used. As the metal fatty acid salt, zinc 2-ethylhexanoate, iron 2-ethylhexanoate, cerium 2-ethylhexanoate, cobalt 2-ethylhexanoate, zinc naphthenate, iron naphthenate, cerium naphthenate, cobalt naphthenate, etc. Is preferably used. In the case of a combination of a metal fatty acid salt and an unsaturated fatty acid, an aromatic compound such as benzene, toluene or xylene can be used as a leveling agent such as dimethyl silicone and a diluting solvent in order to adjust the viscosity and solute concentration that are optimal for coating. Ester compounds such as ethyl acetate and butyl acetate, alcohols such as ethanol and butanol are preferably used.

Examples of the unsaturated fatty acid used in the present invention include acrylic acid, crotonic acid, oleic acid, elaidic acid, linoleic acid, and linolenic acid. For example, as a linoleic acid-containing compound, dehydrated castor oil fatty acid is inexpensive. Can also be applied. As the leveling agent, dimethyl silicone oils such as TSF400 and TSF401 of Toshiba Silicone Co., KF96 of Shin-Etsu Chemical Co., Ltd. and SH200 of Toray Silicone Co., Ltd. are effective. The mixing ratio of these compounds may be arbitrary, but preferably 60 to 100 parts by weight of unsaturated fatty acids such as linoleic acid and 0.1 to 5 parts by weight of a leveling agent such as dimethyl silicone to 100 parts by weight of metal fatty acid salt. Parts, 150-850 parts by weight of the organic solvent.

The coating in the sol-gel method or the film forming method using a fatty acid salt of the present invention can be performed by any method. Preferably, a dip method, a flow coating method, a spinner method, or a spray method is used. The film thickness may be arbitrary, but it is preferably 0.01 to 10 μm in order to exert a sufficient ultraviolet blocking effect. The thin film used in the present invention needs to be laminated in at least one layer, and may be applied in two or more layers in order to enhance the ultraviolet blocking effect. As for the laminating method, one layer may be applied and then applied, or may be applied after firing.

In the present invention, a layer containing silicon is formed on the ultraviolet blocking film. The layer containing silicon is preferably formed by applying a solution containing one or more compounds selected from compounds having at least one Si—C bond or Si—N bond.

A compound having a Si--C bond is generally referred to as an organosilicon compound. In the present invention, the general formula R ¹ _n Si (OR ² ) _4-n (R ¹ and R ² are the same or different from each other. It is preferable to use an organoalkoxysilane represented by different alkyl groups having 1 to 4 carbon atoms or phenyl groups, and n represents an integer of 1 to 3). To give a specific example,
Methyltrimethoxysilane having a CH ₃ -Si bond,
Starting with methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, dimethyldiisopropoxysilane, dimethyldibutoxysilane, etc.
Examples thereof include ethyltrimethoxysilane, ethyltriethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, trimethylethoxysilane, triethylsilaneethoxy, and trimethylphenoxysilane. Of these, methyltrimethoxysilane, methyltriethoxysilane, methyl Tripropoxysilane and methyltributoxysilane are preferable.

When two or more alkyl groups are bonded to a silicon atom, the resulting film is easily cracked, and
If the carbon chain of the alkyl group becomes long, the film is likely to crack.

When forming a film of an organoalkoxysilane, it is preferable to add a small amount of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane or an alkoxide such as Na, Ca, K or B. It is effective in obtaining a good film forming property.

In order to form a film from these organoalkoxysilanes according to the present invention, an appropriate amount of water is added to the organoalkoxysilanes and an organic acid such as acetic acid or hydrochloric acid, phosphoric acid or the like is used as a catalyst for promoting hydrolysis. By adding an appropriate amount of an inorganic acid and stirring and mixing, polycondensation of organoalkoxysilanes is promoted to obtain polyalkylsiloxanes. The molecular weight of the polyalkylsiloxane may be arbitrary, but it is preferably 1000 to 5000.
Examples of the diluent solvent include alcohols such as methanol, ethanol, propanol, butanol, and ethoxymethanol, esters such as ethyl acetate and butyl acetate, and in some cases, carbitol, cellosolves, and acetylacetones for stabilizing polymethylsiloxanes. Is preferably added.

The compound having a Si--N bond is generally called silazane or polysilazane. Silazane is synthesized, for example, by reacting chlorotrimethylsilane with ammonia in an arbitrary solvent. Any silazane can be used, but preferably hexamethyldisilazane, cyclic silazane mixture, N, N-bis (trimethylsilyl) urea, N-trimethylsilylacetamide, dimethyltrimethylsilylamine, diethyltrimethylsilylamine, trimethylsilylimidazole, N-trimethylsilyl. Phenylurea and the like. Polysilazane is synthesized, for example, by reacting dichlorosilane with ammonia in an arbitrary solvent. The general formula is −
_{[SiH x (NH) Y]} n - is represented as a. Here, x, _Y , and n are integers. X, _Y (x, _Y
May be the same or different, but x + _Y = 4, x, _Y = <2. ), N different polymers are obtained. The molecular weight may be arbitrary, but it is preferably 1,000 to 10,000. Polysilazane is stable in a non-polar solvent and can be used after diluting it to an arbitrary concentration.

The coating can be performed by any method.
Preferably, a dip method, a flow coating method, a spinner method, or a spray method is used. The film thickness may be arbitrary. It is preferably 0.01 to 10 μm.

The solution applied on the glass or on the ultraviolet blocking film can be dried and baked to form a desired strong film. Baking may be performed immediately after each layer is applied, or may be performed after completion of all the applications. The calcination should be at a temperature at which organic compounds are removed, preferably 100 ° C or higher. The firing time may be 1 to 60 minutes. The veneered glass that is mounted on a vehicle requires tempered glass to ensure the safety of passengers, and the window needs to have a curved shape depending on the shape of the vehicle. For that purpose, the glass plate is heated at least at 500 ° C. or more to be bent, and is tempered by heating and then tempered. This step may be carried out after forming an ultraviolet blocking film or a film containing silicon on the glass, or may be carried out before forming these films,
Further, it may be carried out after forming one of the films. The heating time may be 1 to 60 minutes. The substrate to be applied is selected from transparent glass substrates.

[0033]

According to the present invention, firstly, it is possible to provide an ultraviolet blocking glass for a vehicle which is durable against vertical movement of a window, scratched and rubbed, that is, has excellent scratch resistance. Secondly, it is possible to provide an ultraviolet blocking glass for vehicles which is free from cracks and film peeling in the strengthening process and the bending process. Thirdly, it is possible to provide an ultraviolet blocking glass for a vehicle in which radio waves are transmitted into the vehicle interior of the vehicle. Furthermore, it is possible to provide an inexpensive, large-area, ultraviolet ray blocking glass for vehicles.

[0034]

EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited to these examples. The test results obtained in the examples and comparative examples are summarized in Table 1.

Synthesis Example of Polysilazane Ammonia gas was introduced into dichlorosilane (20 g) in tetrahydrofuran (1000 ml) to cause a reaction.
The obtained slurry-like substance was filtered. Polysilazane was obtained by concentrating the furnace liquid. It was diluted with m-xylene to 20 wt%. The average molecular weight was 3000.

Example 1 2.8 g of cerium chloride was added to and dissolved in 35 cc of ethanol. To this solution, 1.7 g of titanium tetraisopropoxide was added, 0.9 g of tetraethoxysilane was added, and 5.0 g of 2- (2-methoxyethoxy) ethanol was added, and the mixture was stirred and heated at 80 ° C. for 1 hour. .. After cooling to room temperature, 0.35 ml of water and 0.1 ml of 61% nitric acid.
Was added, and the mixture was stirred and heated at 80 ° C. for 1 hour. PH at this time
Was 2. After this solution was cooled to room temperature, it was applied on a 100 × 100 × 4 mm soda lime glass by a spinner. Spinner application conditions are 1000 rpm and 30
It was seconds. After the coated sample was dried in the air, it was placed in an electric furnace and baked at 500 ° C. for 10 minutes. The film thickness of the obtained sample was 0.4 μm.

On the film of this sample, the polysilazane synthesized in the synthesis example was applied as a protective layer by a spinner, and the coating was performed at 670 ° C.
It was put in the electric furnace of 1 minute and 50 seconds, taken out, and then rapidly cooled with warm air. The spectral transmittance curve of the obtained sample is shown in FIG. 1, which shows that ultraviolet rays of 400 nm or less are sufficiently blocked. The same sample is JIS-R
Taber abrasion test based on 3212 1
The change in haze value at 3.00 rpm was 3.0%, and it was found that the film had sufficient abrasion resistance.

Further, when a strong impact was applied to the same sample as a destructive test, it was confirmed that the glass was finely broken into a so-called tempered glass. In addition, a sample coated with polysilazane by the same treatment method was laid down and placed in an electric furnace at 550 ° C. for 15 minutes without supporting a part thereof to prepare a bent glass. The glass was obtained as a curved shape, but the curved portion had no cracks.

On the other hand, when the radio wave transmission of the glass was examined, radio waves were transmitted and the mobile phone could be used in the passenger compartment. Example 2 As in Example 1, a glass sample having only an ultraviolet blocking film formed thereon was coated with polymethylsiloxane as a protective layer instead of polysilazane by a dipping method. The synthesis example of polymethylsiloxane is shown below. 408 g of methyltrimethoxysilane and 152 g of tetramethoxysilane are mixed and added to 400 g of n-butanol and mixed. Then 5
% Acetic acid aqueous solution (284 g) was slowly added dropwise, the mixture was stirred for about 3 hours, and then allowed to stand for 1 day at room temperature to obtain a protective layer coating solution. A glass sample having only a UV blocking film with a masking film attached to the back side was dipped in this coating solution, pulled up at 20 cm / min, and heated at 120 ° C. for 15 minutes.
It was dried for 1 minute, put in an electric furnace at 650 ° C. for 1 minute 50 seconds, taken out, and then rapidly cooled with warm air.

When the obtained sample was tested in accordance with Example 1, the change in haze value was 3.4% in the Taber test, the fragments when broken were fine, and the radio wave transmission was sufficient. there were. Further, in the bending test when the protective film was formed by firing, neither peeling nor cracking of the film occurred.

Comparative Example 1 Tetramethoxysilane 550 g instead of methyltrimethoxysilane 408 g and tetramethoxysilane 152 g
The same experiment and test as in Example 2 were carried out except that a protective film was formed by using polysiloxane prepared by using. The results are shown in Table 1.

[0042] In Comparative Example 2 Example 1, only the form ultraviolet blocking layer, to prepare those that do not coating and firing of the protective layer, was used as a sample of Comparative Example 2. When this comparative sample was subjected to a Taber abrasion test based on JIS-R3212, the film was peeled off after 500 rotations. In the destructive test, the fragments of the comparative sample showed a sharp cross section.

Example 3 Zinc 2-ethylhexanoate (18%) 100 g, dehydrated castor oil fatty acid (linoleic acid content 86%) 80 g, TSF400 (Toshiba Silicone Co., Ltd.) as a leveling agent
5 g, and mixed xylene 315 g as a diluting solvent
A coating solution for zinc oxide film was obtained by mixing and stirring. A 100 × 100 × 4 mm plate of soda lime glass having a masking film attached on one side was dipped in this coating solution and pulled up at a speed of 20 cm / min to form a coating film on one side. The coating film is dried and cured in a far-infrared furnace at 150 ° C for 15 minutes, and further 500 ° C in an electric furnace.
By baking for 15 minutes, a uniform and transparent zinc oxide film having a thickness of 0.93 μm was obtained. Polysilazane synthesized in Synthesis Example was applied as a protective layer on this film by a spinner, then placed in an electric furnace at 670 ° C., taken out for 1 minute 50 seconds, and rapidly cooled with warm air.

When the obtained sample was tested according to Example 1, the change in haze value in the Taber test was 1.8%, and the fragments when broken were fine,
The radio wave transmission was also sufficient. Further, in the bending test when the protective film was formed by firing, neither peeling nor cracking of the film occurred.

Example 4 A glass having a zinc oxide film was prepared according to Example 3, and the polymethylsiloxane prepared in Example 2 was applied as a protective layer by the dipping method, and then placed in an electric furnace at 650 ° C. for 1 After 50 minutes, it was taken out and rapidly cooled with warm air.

The spectral transmittance curve of the obtained sample is shown in FIG. 2, which shows that ultraviolet rays of 400 nm or less are sufficiently blocked. The obtained sample was used in Example 1.
According to the test, the haze value change was 3.5% in the Taber test, the fragments when broken were fine, and the radio wave transmission was sufficient. Furthermore, in the bending test when firing and forming the protective film, peeling of the film,
No crack was generated.

Comparative Example 3 The same experiment and test as in Example 3 were carried out except that the protective film was formed using the polysiloxane prepared in Comparative Example 1. The results are shown in Table 1.

[0048] In Comparative Example 4 Example 3, only the form ultraviolet blocking layer, to prepare those that do not coating and firing of the protective layer, was used as a sample of Comparative Example 4. This comparative sample was subjected to a Taber abrasion test based on JIS-R3212, and the film was peeled off after 100 rotations. In the destructive test, the fragments of the comparative sample showed a sharp cross section.

[0049]

[Table 1]

[0050]

As described in detail above, according to the present invention,
First, it is possible to provide an ultraviolet blocking window for a vehicle that is durable against vertical movement of the window, scratched and rubbed, that is, has excellent scratch resistance. Secondly, it is possible to provide an ultraviolet ray blocking window for a vehicle, which is free from cracks and film peeling in the strengthening process and the bending process. Thirdly, it is possible to provide an ultraviolet blocking glass for a vehicle in which radio waves are transmitted into the vehicle interior of the vehicle. Further, it is possible to provide an inexpensive ultraviolet blocking window for a vehicle having a large area.

[Brief description of drawings]

FIG. 1 is a diagram showing a spectral transmittance curve of a thin film sample of Example 1.

FIG. 2 is a diagram showing a spectral transmittance curve of a thin film sample of Example 4.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kanae Ninomiya 2805 Imafuku Nakadai, Kawagoe City, Saitama Central Glass Co., Ltd. Tokyo Research Laboratory

Claims (2)

[Claims] 1. An ultraviolet blocking glass for vehicles, wherein the glass is tempered and / or bent, and at least one ultraviolet blocking film is formed on the glass, and a silicon-containing layer is formed on the outside. UV protection glass for vehicles, which is characterized by 2. The layer containing silicon is at least C
Compound having H ₃ —Si bond and / or Si—N
The ultraviolet blocking glass for vehicles according to claim 1, which is formed by applying a compound having a bond.