JP3034996B2 - Laminated safety glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated safety glass in which a glass plate and a penetration-resistant plastic sheet having a light control function of selectively scattering incident light in a predetermined angle range are laminated.

[0002]

2. Description of the Related Art In general, a laminated safety glass in which a polyvinyl butyral film is inserted between two glass plates and the glass plates are bonded to each other is used, and is called a laminated glass. This has the property that even if a human collides with the glass and the glass is broken, the glass does not scatter.

Further, when a human collides with the glass, a protective plastic film or sheet is provided on the surface of a single glass plate or a laminated glass plate to prevent the corners of the broken glass from tearing the head or face. Laminated and tear-resistant glass has been devised in consideration of preventing direct contact between human and glass (Japanese Patent Publication Nos. 57-27050, 60-219053, 60-219054, and 62-277440). Such). Typical examples of the structure of the glass for preventing tears are glass or laminated glass / polyvinyl butyral or ethylene-vinyl acetate copolymer / polyethylene terephthalate treated with hard coat (the opposite side of the hard-coated surface is polyvinyl butyral or ethylene-vinyl acetate). (Contact with the polymer surface), glass or laminated glass / thermoplastic polyurethane or polyvinyl butyral / thermosetting polyurethane.

Further, as an example of a typical laminated safety glass for theft prevention, a laminated glass in which a thermoplastic polyurethane is inserted between a glass and a polycarbonate sheet to bond the glass and the polycarbonate is used. Further, as a typical laminated safety glass for bulletproof glass, a glass in which a thermoplastic polyurethane and a polycarbonate sheet are alternately laminated on glass, and the outermost layer is made of glass and a polycarbonate sheet is exemplified.

On the other hand, conventionally, using a photopolymerizable composition containing a compound having a polymerizable carbon-carbon bond in a molecule,
It is known from the proposals of the present inventors that a light control plate that selectively scatters only incident light in a specific angle range can be obtained by adjusting polymerization curing conditions such as light irradiation. For example, a mixture of at least two types of monomers (or oligomers) having a polymerizable carbon-carbon double bond and capable of producing polymers having different refractive indexes, for example, A photopolymerizable composition in which a liquid material composed of ether urethane acrylate, tribromophenoxyethyl acrylate, and hydroxyisobutylphenone is uniformly mixed is maintained in a film form, and is vertically spaced from the surface of the film form. When a linear light source (rod-shaped ultraviolet lamp) provided horizontally is placed horizontally, and ultraviolet light is irradiated from this light source to cure the film-like body portion, a light control film is obtained.

[0006] However, such a light control film has poor light resistance and does not have mechanical properties satisfying the penetration resistance. Therefore, in order to practically provide the laminated safety glass with a light control function, for example, in the case of a laminated glass, it has excellent penetration resistance, such as an ultraviolet absorbing glass / ethylene-vinyl acetate copolymer, and has a glass and light control function. Material with good adhesion to both films / light control film / material with excellent penetration resistance such as ethylene-vinyl acetate copolymer and good adhesion to both glass and light control film / glass It is necessary to make a structure like a laminate of the above. With such a configuration, penetration resistance can be obtained. Also, if an ultraviolet absorber is mixed with a penetration resistant material such as an ethylene-vinyl acetate copolymer, the light control film is not irradiated with ultraviolet light,
A laminated glass having good light resistance is obtained.

However, since such a laminate has a large thickness and a plurality of layers of soft plastic materials having different coefficients of thermal expansion are laminated, optical distortion is likely to occur in the laminated glass, and the process is complicated. There was a point.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laminated safety glass using a plastic sheet having a light control function and having penetration resistance, the number of which is smaller than that of the above-mentioned laminate. It is an object of the present invention to provide a laminated safety glass having a small thickness and a simple and inexpensive manufacturing process.

[0009]

Means for Solving the Problems That is, the present inventors,
By adding a light control function to conventional penetration-resistant materials and rubbers such as polyvinyl butyral, polyurethane, and ethylene-vinyl acetate copolymer, the number of laminated layers is smaller than that of conventional safety glass with light control function, and the thickness is smaller. As a result of intensive studies for the purpose of providing a laminated safety glass having a small size and a low-cost laminated safety glass having a simplified manufacturing process, the present invention has been achieved.

That is, the present invention comprises: a) a penetration-resistant plastic sheet layer having a light control function of selectively scattering incident light in a specific angle range and transmitting other light; and b) an inorganic glass or organic glass layer. A laminated safety glass comprising: a sheet layer having a gel hardened layer on a surface thereof, the hardened layer having a carbon-carbon double bond on the surface of the sheet, and a refractive index of the sheet. Is a gel layer impregnated with a photopolymerizable composition containing a monomer and / or an oligomer capable of producing a polymer having a different refractive index, and cured by irradiating light from a linear light source at a predetermined angle. The laminated safety glass is characterized in that:

Hereinafter, the present invention will be described in detail.

The laminated safety glass of the present invention comprises a penetration-resistant plastic sheet layer having a light control function and an inorganic glass layer (or an organic glass layer). It has a gel hardening layer on its surface, which can produce a polymer having a carbon-carbon double bond on the surface of the sheet and having a refractive index different from that of the sheet. The gel layer impregnated with the photopolymerizable composition containing a monomer and / or an oligomer is cured by irradiating light from a linear light source at a predetermined angle.

The photopolymerizable composition used herein has at least one carbon-carbon double bond in the molecule, and has a refractive index of at least 0.01 for the penetration-resistant plastic sheet described later. Refractive index difference, preferably at least 0.
A monomer (or an oligomer) capable of forming a polymer having a refractive index difference of 02 or containing the same. For example, a polymerizable group such as an acryloyl group, a methacryloyl group, a vinyl group, or an allyl group may be included in the molecule. It is a monomer or oligomer containing at least one monomer and can be polymerized by light, for example, ultraviolet light.

As a specific example of the above-mentioned monomer, those having at least one acryloyl group, methacryloyl group, vinyl group or allyl group in the molecule are preferable. For example, methyl acrylate, tetrahydrofurfuryl acrylate, ethyl carbitol acrylate, dicyclopentenyloxyethyl acrylate, isobornyl acrylate, phenyl carbitol acrylate, nonylphenoxyethyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, ω-
Hydroxyhexanoyloxyethyl acrylate, acryloyloxyethyl succinate, acryloyloxyethyl phthalate, phenyl acrylate, tribromophenyl acrylate, phenoxyethyl acrylate, tribromophenoxyethyl acrylate, tribromophenoxy polyethylene glycol acrylate, benzyl acrylate, p-bromobenzyl Acrylates, 2-ethylhexyl acrylate, lauryl acrylate, 2,2,3,3-tetrafluoropropyl acrylate and methacrylates corresponding to these monofunctional acrylates, bisphenol A diacrylate, 2,2-bis (4 Polyfunctional acrylates such as -acryloxyethoxy-3,5-dibromophenyl) propane Or methacrylates corresponding to these acrylates, or vinyl compounds such as vinyl benzoate, styrene, p-chlorostyrene, divinylbenzene, vinyl acetate, acrylonitrile, N-vinylpyrrolidone, and vinylnaphthalene, or diethylene glycol bis Allyl compounds such as allyl carbonate, diallylidenepentaerythritol, triallyl isocyanurate, diallyl phthalate, diallyl isophthalate and the like can be mentioned.

Examples of the oligomer include polyester acrylate, polyol polyacrylate, modified polyol polyacrylate, polyacrylate having an isocyanuric acid skeleton, melamine acrylate, polyacrylate having a hydantoin skeleton, polybutadiene acrylate,
Epoxy acrylate, urethane acrylate and the like can be mentioned.

As the photopolymerizable composition, these monomers or oligomers can be used alone, but a mixture of these monomers (or oligomers) or a mixture of these monomers (or oligomers) and a solvent can also be used. Examples of the solvent include organic chemicals such as toluene, n-hexane, cyclohexane methyl alcohol, ethyl alcohol, acetone, methyl ethyl ketone, tetrahydrofuran, ethyl acetate, dimethylformamide, dimethylacetamide, and acetonitrile. When using a mixture with such a solvent, the monomer or oligomer in the photopolymerizable composition is usually 1 to
90% by weight.

A photopolymerization initiator can be added to the above photopolymerizable composition, if necessary. Examples of the photopolymerization initiator used include benzophenone, benzyl, Michler's ketone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, benzoin ethyl ether, diethoxyacetophenone, benzyl dimethyl ketal,
Examples thereof include hydroxyisobutylphenone, 1-hydroxycyclohexylphenyl ketone, and the like. The photopolymerization initiator varies depending on the type of the photopolymerizable composition, but is usually added in an amount of 0.1 to 10% by weight based on the photopolymerizable composition.

The penetration-resistant plastic sheet used in the present invention has transparency (colorless or colored), is a thermoplastic resin or a resin having a three-dimensional crosslinked structure, and has the above-mentioned monomer (or oligomer). Alternatively, any material may be used as long as the solvent can enter the inside from the surface. Practically, polyvinyl butyral, polyurethane,
Thermoplastic or thermosetting materials such as ethylene-vinyl acetate copolymer, polyester, and polyvinyl chloride; and rubber materials such as silicone rubber and styrene-isoprene rubber. If necessary, a stabilizer or a light absorbing agent is added to these penetration-resistant plastic sheets. As these penetration-resistant plastic sheets, 0.1.
Those having a thickness of 2 to 3 mm can be suitably used.

In the present invention, the surface of the penetration-resistant plastic sheet is impregnated with the photopolymerizable composition to form a gel layer. That is, the photopolymerizable composition is immersed in the liquid of the photopolymerizable composition, or the photopolymerizable composition is applied by a method such as applying the photopolymerizable composition to the surface of the penetration-resistant plastic sheet. The material is contact-impregnated with a penetration-resistant plastic sheet to swell the surface and form a gel layer. By heating to 40 to 60 ° C. if necessary at the time of this contact, the formation of the gel layer can be hastened. The thickness of the gel layer is at least 25 μm, preferably 100 μm or more and 50% or less of the thickness of the plastic film or sheet. This contact time is usually several seconds to several minutes.

It is considered that this gel layer is in a state in which the monomer or oligomer of the photopolymerizable composition has entered the gaps in the structure of the polymer of the resin constituting the penetration-resistant plastic sheet.

Next, the gel layer is irradiated with light from a linear light source at a predetermined angle to form a cured gel layer. The linear light source used emits ultraviolet light or other actinic rays that contribute to the photopolymerization of the photopolymerizable composition, and the light source has a linear shape when viewed from the irradiated position (gel layer). Is what it is. The size of the light source viewed from the irradiated position is such that the viewing angle A in the long axis direction of the light source is at least 8 °, preferably at least 12 °, and the viewing angle B in the short axis direction of the light source is at most A / 4, more preferably. Those at most A / 10 or less are preferred. A rod-shaped ultraviolet lamp is a preferred linear light source in the present invention. In addition to such a linear light source, a light source in which the light source is apparently linear when viewed from the irradiation position, for example, a light source in which a number of point light sources are continuously arranged and apparently arranged in a linear shape, or laser light An apparatus configured to scan light (e.g., irradiate one point at an irradiation position from a number of different angles) using a rotating mirror and a concave mirror can also be used as a linear light source. When the irradiation light is ultraviolet light, for example, a mercury lamp or a metal halide lamp is suitable as a rod-shaped ultraviolet lamp in consideration of ease of handling.

By irradiating light to a penetration-resistant plastic sheet having a gel layer facing up or a gel layer facing backward from a predetermined angle using a linear light source, the gel of the penetration-resistant plastic sheet is exposed. The layer is polymerized to show anisotropy in the long axis and short axis directions of the linear light source, and has a light control function that scatters light at a specific angle only when rotated about the light source long axis direction. Thus, a penetration-resistant plastic sheet is obtained.

In the present invention, as the inorganic glass or organic glass layer to be laminated with the above-mentioned penetration resistant plastic sheet, a normal inorganic glass plate (slowly cooled glass, tempered glass) having a thickness of 1 to 5 mm, polycarbonate sheet, polymethyl Methacrylate sheets and the like may be mentioned, and these may have a single layer or a laminated structure of two or more layers. When two or more layers of inorganic or organic glass are used, between two layers of inorganic glass, between two layers of organic glass, or between inorganic and organic glass, they are bonded using a soft material such as polyvinyl butyral. Is preferred.

The laminated safety glass of the present invention comprises a transparent plastic film layer, preferably 5-500 μm thick, such as polyester, polyacrylate, polycarbonate or polyurethane having a crosslinked structure, on the outside of the penetration-resistant plastic sheet layer. It is preferable to have a film layer for surface protection. As this film, polyethylene terephthalate, a stretched transparent polyalkylene terephthalate such as polybutylene terephthalate, polyarylate, polycarbonate, or a crosslinked structure produced through a curing step using heat, ultraviolet rays, electron beams, or the like, and Polyurethane excellent in self-healing property is preferred. The film thickness has an appropriate range depending on each type. For example, in the case of polyethylene terephthalate, the thickness is 50 to 300 μm, more preferably 100 to 200 μm. If the film thickness of the polyethylene terephthalate is less than 50 μm, the surface is damaged by a sharp object and permanent damage is left as a permanent strain. If the film thickness is 300 μm or more, the transparency becomes poor. In the case of a polyurethane having a crosslinked structure, the thickness is 5 μm or more, preferably 10 μm or more. When the film thickness of the self-healing polyurethane having a crosslinked structure is 5 μm or less, the chemical resistance deteriorates, that is, when the surface is washed with a glass cleaner or the like, the components in the glass cleaner penetrate the crosslinked polyurethane layer and have a low resistance. It penetrates to the penetrating plastic layer and causes permanent distortion.

When a plastic film having no self-healing property, such as polyethylene terephthalate, is used, a hard coat treatment is applied to the surface not in contact with the penetration-resistant plastic sheet for the purpose of preventing abrasion. It is desirable to apply. As the hard coat, a silicon-based thermosetting hard coat, a silicon-based, acrylic-based, or epoxy-based ultraviolet or electron beam-cured hard coat is suitable.

In the present invention, as a method of laminating a penetration-resistant plastic sheet layer having a light control function and an inorganic glass or organic glass layer, for example, an inorganic glass plate (or an organic glass plate) and a penetration-resistant plastic sheet are laminated. And pressurizing and heating them in an autoclave while degassing them using a vacuum bag to produce laminated safety glass. A solution or melt of the polyurethane composition is coated on the surface of an inorganic glass plate (or an organic glass plate) using a roll coater or a doctor blade, and then the surface of the polyurethane composition layer is treated to have a light control function. You may do it. When a transparent plastic film layer is formed outside the penetration-resistant plastic sheet layer having a light control function, an inorganic glass plate (or an organic glass plate), a penetration-resistant plastic sheet and a plastic film layer are laminated in this order. The above processing can be performed together.

[0027]

According to the present invention, by using a penetration-resistant plastic sheet provided with a light control function, the number of conventional laminations can be reduced, the cost is low, and the light resistance is good.
A practical laminated safety glass is obtained.

[0028]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In the examples, “parts” means “parts by weight”.

In the light resistance test, light was irradiated from the glass surface using a sunshine weather o meter (SWO), and the appearance of the laminated safety glass after 1000 hours was observed. SWO conditions were 63 ° C. and no water shower was used.

Example 1 A polyvinyl butyral sheet for laminated glass (manufactured by Sekisui Chemical Co., Ltd., 760 μm, refractive index: about 1.49) was coated on one side.
A solution of 50 parts of phenoxyethyl acrylate monomer (refractive index of polymer: about 1.557), 3 parts of hydroxyisobutylphenone and 50 parts of methyl ethyl ketone was added to 0.1 part.
Apply using a 2mm gap blade,
Dried for minutes. As a result, the phenoxyethyl acrylate monomer and hydroxyisobutylphenone in the coating solution diffused inside the sheet, and methyl ethyl ketone was vaporized. Then, a gel layer having a depth of about 100 μm was formed on the surface of the sheet.

As shown in FIG. 1, the polyvinyl butyral sheet 3 on which the gel layer was formed was placed horizontally,
/ Cm, a bar-shaped high-pressure mercury lamp 1 having a lamp length of 25 cm is horizontally arranged at a position 50 cm directly above the sheet so as to be parallel to the side AB of the sheet, and ultraviolet light is applied to the gel layer 2 on the surface of the sheet 3. Irradiated for 5 minutes and light cured. Thus, a penetration-resistant plastic sheet having a light control function was produced.

Next, the light control film prepared above is sandwiched between two 2.1 mm-thick glasses, and the thus obtained film is put in a vacuum bag and treated in a vacuum of 10 mmHg or less for 30 minutes. did. Then, in a vacuum state, put the whole vacuum bag in an autoclave at 130 ° C.
The treatment was performed under the conditions of 25 minutes and a pressure of 10 kg / cm ² .
In this way, as shown in FIG. 2, a laminated glass in which the inorganic glass layer 4, the polyvinyl butyral sheet 5 having the cured gel layer 6 on the surface, and the inorganic glass layer 7 are laminated in this order is obtained, and the haze ratio of the laminated glass is obtained. The angle dependence was as shown in FIG. 3, and when the physical properties were evaluated, it had good penetration resistance, and the appearance after the light resistance test was good without any change from the initial state.

Embodiment 1 2 Example. A light control film was prepared in the same manner as in Example 1.

Next, the polyvinyl butyral sheet having the light control function prepared above was placed on a 3.5 mm thick inorganic glass plate such that the opposite surface of the light control layer was in contact with the glass. Separately, a 30% aqueous solution of colloidal silica, methyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and a silicone surfactant were mixed on the surface of a 175 μm-thick polyethylene terephthalate film, and partially hydrolyzed and condensed with glacial acetic acid. Apply things,
After baking and hardening, a silicon hard coat treatment was performed. (Example 2 of JP-A-60-219054)
The sheets were stacked such that the opposite side of the polyethylene terephthalate hard-coated surface was in contact with the surface of the polyvinyl butyral sheet. Further, an inorganic glass plate having a thickness of 3 mm was placed thereon. The thus obtained product was put in a vacuum bag and treated in a vacuum of 10 mmHg or less for 30 minutes. Thereafter, the whole vacuum bag was placed in an autoclave while being kept in a vacuum state, and treated at 130 ° C. for 25 minutes under a pressure of 10 kg / cm ² . After the completion of the autoclave treatment, the glass plate having a thickness of 3 mm on the polyethylene terephthalate was removed, and as shown in FIG. 4, an inorganic glass layer 8 / a polyvinyl butyral sheet 10 having a cured gel layer 9 on the surface and having a light control function. A tear prevention glass composed of polyethylene terephthalate 11 / hard coat layer 12 was produced.

When the physical properties of the thus obtained tear-preventing glass were evaluated, the dependence of the haze ratio on the incident angle shown in FIG. 3 was obtained, and good penetration resistance was obtained even after immersion in boiling water at 100 ° C. for 2 hours. The appearance was good without any change from the initial state. The appearance after the light resistance test was almost the same as the initial appearance.

Example 3 Light was obtained in the same manner as in Example 1 except that the polyvinyl butyral sheet of Example 1 was changed to a thermoplastic polyurethane sheet (PE-192, manufactured by Morton, thickness: 760 μm, refractive index: about 1.5). A control film was prepared.

Next, the polyurethane sheet having the light control function prepared above was placed on an inorganic glass plate having a thickness of 5.0 mm, and one surface of the polyurethane sheet was hardened according to Example 1 of JP-A-64-7582. Coated, 5.0
A polycarbonate sheet having a thickness of mm was stacked so that the surface opposite to the hard coat surface was in contact with the polyurethane sheet. The thus obtained product was put in a vacuum bag and treated in a vacuum of 10 mmHg or less for 30 minutes. Thereafter, the whole vacuum bag was placed in an autoclave while being kept in a vacuum state, and treated at 130 ° C. for 30 minutes under a pressure of 10 kg / cm ² . After completion of the autoclave treatment, the glass plate on the polyethylene terephthalate was removed, and an inorganic plate glass / a polyurethane sheet having a light control function /
A tear-resistant glass composed of a polycarbonate / hard coat layer was prepared.

When the physical properties of the thus obtained tear-preventing glass were evaluated, the glass had a good appearance even after immersion in boiling water at 100 ° C. for 2 hours, and also had a good appearance after the light resistance test. there were.

Embodiment 1 4 Thermoplastic polyurethane sheet (PN0 manufactured by Morton)
3. A solution of 50 parts of benzyl acrylate monomer (refractive index of polymer: about 1.58), 3 parts of hydroxyisobutylphenone, and 50 parts of methyl ethyl ketone was applied to one surface of 760 μm thick and having a refractive index of about 1.50 to 1.52. .2
It was applied using a blade with a mm gap and dried at 50 ° C. for 5 minutes. As a result, a gel layer was formed on the sheet surface.

Thereafter, in the same manner as in Example 1, a penetration-resistant plastic sheet having a light control function, that is, a thermoplastic polyurethane having a light control function was produced.

Next, a thermosetting polyurethane film was prepared. First, 94.2 g of a polycaprolactone-based triol having an OH group content of about 9.3 to 9.4% and 1,6
100 g of polyisocyanurate based on hexamethylene diisocyanate was mixed and degassed. In addition, NCO
The / OH ratio is 1.

Next, dibutyltin dilaurate 0.031
g and the silicon-based flow control agent 0.21 g were mixed and mixed at about 5 ° C. so as not to generate bubbles. afterwards,
The above-mentioned mixed solution is coated using an applicator on the release-treated surface of an inorganic plate glass having a thickness of 30 cm × 30 cm and a thickness of 3 mm, which has been subjected to release treatment by applying dimethylsiloxane in advance, and polymerized at 120 ° C. for 30 minutes to obtain about 20
A thermosetting polyurethane layer having a thickness of 0 μm was obtained.

Next, the embossed thermoplastic polyurethane sheet having the above-mentioned light control function is placed on the thermosetting polyurethane layer of the laminate of the glass / thermosetting polyurethane layer subjected to the release treatment. A silane coupling agent (KBM40) is used to increase the adhesion to the polyurethane sheet in advance.
3: 30 cm X 30 cm treated by Shin-Etsu Chemical Co., Ltd.
A further 3.5 mm thick second glass plate was further placed on it. The thus obtained product was put in a vacuum bag and treated in a vacuum of 10 mmHg or less for 30 minutes. Thereafter, the whole vacuum bag was put into an autoclave while being kept in a vacuum state, and treated at 145 ° C. for 25 minutes under a pressure of 10 kg / cm ² . After the completion of the autoclave treatment, the release-treated inorganic plate glass was removed from the thermosetting polyurethane surface, and a laminate composed of the inorganic plate glass / thermoplastic polyurethane sheet having a light control function / thermosetting polyurethane layer was prepared.

When the physical properties of the laminated safety glass thus obtained were evaluated, the appearance after the hot water test in which the laminated safety glass was immersed in boiling water for 2 hours was slightly cloudy, but there was no practical problem and the penetration resistance was good. Met. CS-10F wheel,
When the Taber abrasion was evaluated under the conditions of a load of 500 g and 100 rotations, the rate of increase in turbidity was as good as 0.9.

Example 5 In the same manner as in Example 4, a thermoplastic polyurethane sheet having a light control function was produced.

Next, in order to increase the adhesion to the polyurethane sheet in advance, a silane coupling agent (KBM403:
The above-prepared thermoplastic polyurethane sheet having a light control function was placed on a 30 × 30 cm, 3.5 mm thick inorganic glass plate treated by Shin-Etsu Chemical Co., Ltd. A 180 μm thick polycarbonate film hard-coated on one side according to -277440 was stacked such that the opposite side of the polycarbonate hard-coated side was in contact with the thermoplastic polyurethane sheet surface. Further, an inorganic plate glass having a thickness of 3 mm was placed thereon. The thus obtained product was put in a vacuum bag and treated in a vacuum of 10 mmHg or less for 30 minutes. After that, in a vacuum state, the whole vacuum bag,
Place in autoclave at 130 ° C, 25 minutes and pressure 10
The treatment was performed under the condition of kg / cm ² . After the completion of the autoclave treatment, the glass plate on the polycarbonate was removed, and a laminated safety glass comprising an inorganic plate glass / a thermoplastic polyurethane sheet having a light control function / polycarbonate / hard coat layer was produced.

When the physical properties of the laminated safety glass thus obtained were evaluated, the laminated safety glass had good penetration resistance even after being immersed in boiling water at 100 ° C. for 2 hours, and the appearance was unchanged from the initial state. It was good. The appearance after the light resistance test was also good.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a method for manufacturing a laminated safety glass of the present invention.

FIG. 2 is a cross-sectional view showing the structure of the laminated safety glass of the present invention.

FIG. 3 is a graph showing the light control performance of the present invention.

FIG. 4 is a sectional view showing the structure of another laminated safety glass of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-pressure mercury lamp in the shape of a rod 2 Gelled plastic surface layer 3 Plastic sheet 4, 7, 8 Inorganic glass layer 5, 10 Plastic sheet layer 6, 9 Gel hardened layer 11 Plastic film layer 12 Hard coat layer

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // C03C 27/12 C03C 27/12 A (72) Inventor Koichi Maeda 3-5-11 Doshumachi, Chuo-ku, Osaka City Japan Sheet Glass Inside (72) Inventor Satoshi Ishizuka 3-5-11, Doshu-cho, Chuo-ku, Osaka-shi Inside (72) Inventor Akio Takigawa 3-5-11, Doshu-cho, Chuo-ku, Osaka-shi Japan Sheet Glass Co., Ltd. (56) References JP-A-1-11723 (JP, A) JP-A-3-122035 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35 / 00 C03C 27/12

Claims (4)

(57) [Claims] 1. A laminate comprising: a) a penetration-resistant plastic sheet layer having a light control function of selectively scattering incident light in a specific angle range and transmitting other light; and b) an inorganic glass or organic glass layer. A safety glass, wherein the sheet layer has a gel hardened layer on its surface, the hardened layer has a carbon-carbon double bond on the surface of the sheet and is different from the refractive index of the sheet A gel layer impregnated with a photopolymerizable composition containing a monomer and / or oligomer capable of forming a polymer having a refractive index is cured by irradiating light from a linear light source at a predetermined angle. A laminated safety glass, characterized in that: 2. The laminated safety glass according to claim 1, wherein the penetration-resistant plastic sheet layer is made of polyvinyl butyral, polyurethane, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, or silicone rubber. 3. The laminated safety glass according to claim 1, wherein c) a transparent plastic film layer having a thickness of 5 to 500 μm is laminated on the penetration-resistant plastic sheet layer. 4. The laminated safety glass according to claim 3, wherein the plastic film layer is made of polyester, polyarylate, polycarbonate, or polyurethane having a crosslinked structure.