JP2021193065A - Interlayer for laminated glass, laminated glass, and method for producing interlayer for laminated glass - Google Patents

Abstract

To provide an interlayer for laminated glass that has a light control body layer but prevents the exudation of the light control body at the periphery, a laminated glass using the interlayer for laminated glass, and a method for producing the interlayer for laminated glass.SOLUTION: An interlayer for laminated glass has a structure in which an adhesion layer, a light control body layer, and an adhesion layer are laminated in order in a thickness direction, where the light control body layer has its edge sealed with a seal layer.SELECTED DRAWING: Figure 1

Description

The present invention has a laminated glass interlayer film having a dimming body layer but no exudation of the dimming body in the peripheral portion, a laminated glass using the laminated glass interlayer film, and a laminated glass interlayer film. Regarding the manufacturing method of.

A dimming body whose light transmittance changes by applying a voltage is widely known. The dimming body is roughly classified into a dimming body using a liquid crystal material and a dimming body using an electrochromic compound. In particular, a dimming body using a liquid crystal material has been studied for the purpose of applying it to a display device such as an electric light board.

In recent years, laminated glass using a dimming body as an interlayer film for laminated glass has been proposed in order to control the temperature inside a vehicle such as an automobile or a room such as a building (for example, Patent Document 1 and the like). Specifically, a laminated glass interlayer film having a structure in which an adhesive layer, a dimming body layer, and an adhesive layer are laminated in this order in the thickness direction has been proposed. It is considered that the light transmittance of the laminated glass can be controlled by using such an interlayer film for laminated glass.
However, in the laminated glass interlayer film having such a dimming body layer, there is a problem that a part of the dimming body may seep out to the peripheral portion and be contaminated. In particular, this problem was remarkable when a liquid crystal material was used as the dimming body.

Japanese Unexamined Patent Publication No. 2013-250529

In view of the above situation, the present invention has a laminated glass interlayer film having a dimming body layer but no exudation of the dimming body in the peripheral portion, a laminated glass using the laminated glass interlayer film, and the same. It is an object of the present invention to provide a method for producing an interlayer film for laminated glass.

The present invention is an interlayer film for laminated glass having a structure in which an adhesive layer, a light control body layer, and an adhesive layer are laminated in this order in the thickness direction, and the peripheral portion of the light control body layer is sealed with a seal layer. It is an interlayer film for laminated glass.
The present invention will be described in detail below.

The laminated glass interlayer film having a structure in which the adhesive layer, the light control body layer, and the adhesive layer are laminated in the order of thickness is usually a laminated body in which the adhesive layer, the light control body layer, and the adhesive layer are laminated in this order. It is prepared and manufactured through a laminating step in which it is pressure-bonded by an autoclave while applying a temperature of about 100 to 150 ° C. The present inventors have found that a part of the dimming body exudes from the dimming body layer of the interlayer film for laminated glass when thermocompression bonding is performed in the laminating process.
As a result of diligent studies, the present inventors have found that by sealing the peripheral edge of the dimming body layer with a sealing layer, it is possible to prevent the dimming body from seeping out from the dimming body layer during the laminating process. , The present invention has been completed.

The interlayer film for laminated glass of the present invention has a structure in which an adhesive layer, a dimming body layer, and an adhesive layer are laminated in this order in the thickness direction. By having the dimming body layer, the transmittance of light can be changed by applying a voltage to the interlayer film for laminated glass of the present invention.

The dimming body included in the dimming body layer is not particularly limited, and conventionally known dimming bodies such as a dimming body using a liquid crystal material and a dimming body using an electrochromic compound can be used. In particular, the present invention is particularly effective when a dimming body using a liquid crystal material or a dimming body having a relatively high fluidity such as SPD (Suspended Particle Device) is used.

Examples of the dimming body made of the above liquid crystal material include TN liquid crystal, STN liquid crystal, TFT liquid crystal, and a material in which a polymer matrix is impregnated with these liquid crystals.

When the dimming body is a dimming body having relatively high fluidity, it is preferable that the dimming body layer contains spacer particles. By containing the spacer particles, the thickness of the dimming body layer can be stabilized. The spacer particles are not particularly limited, and inorganic particles and organic particles can be used.
Further, when a gel-like dimming body (for example, manufactured by Kyushu Nanotech Co., Ltd., trade name "MIYO-film") in which a polymer crosslinked body is mixed with a liquid crystal display is used as the dimming body, spacer particles are not used. In both cases, the thickness of the dimming body layer can be stabilized.

The thickness of the dimming body layer is not particularly limited, but the preferred lower limit is 80 μm and the preferred upper limit is 500 μm. When the thickness of the dimming body layer is within this range, the light transmittance can be sufficiently changed by applying a voltage. The more preferable lower limit of the thickness of the dimming body layer is 100 μm, and the more preferable upper limit is 400 μm.

The adhesive layer has a role of sandwiching the dimming body layer and exerting adhesion to the glass.
The adhesive layer preferably contains a thermoplastic resin.
Examples of the thermoplastic resin include polyvinylidene fluoride, polytetrafluoroethylene, vinylidene fluoride-propylene hexafluoride copolymer, polyethylene trifluoride, acrylonitrile-butadiene-styrene copolymer, polyester, polyether, and the like. Examples thereof include polyamide, polycarbonate, polyacrylate, polymethacrylate, polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyvinyl acetal, and ethylene-vinyl acetate copolymer. Among them, the adhesive layer preferably contains polyvinyl acetal or an ethylene-vinyl acetate copolymer, and more preferably contains polyvinyl acetal.

The polyvinyl acetal is not particularly limited as long as it is a polyvinyl acetal obtained by acetalizing polyvinyl alcohol with an aldehyde, but polyvinyl butyral is preferable. Further, if necessary, two or more kinds of polyvinyl acetals may be used in combination.

The preferable lower limit of the degree of acetalization of the polyvinyl acetal is 40 mol%, the preferable upper limit is 85 mol%, the more preferable lower limit is 60 mol%, and the more preferable upper limit is 75 mol%.
In the polyvinyl acetal, the preferable lower limit of the amount of hydroxyl groups is 15 mol%, and the preferable upper limit is 35 mol%. When the amount of hydroxyl groups is 15 mol% or more, the adhesiveness between the interlayer film for laminated glass and the glass is high. When the amount of hydroxyl groups is 35 mol% or less, the interlayer film for laminated glass can be easily handled.
The degree of acetalization and the amount of hydroxyl groups can be measured according to, for example, JIS K6728 "polyvinyl butyral test method".

The polyvinyl acetal can be prepared by acetalizing polyvinyl alcohol with an aldehyde.
The polyvinyl alcohol is usually obtained by saponifying polyvinyl acetate, and polyvinyl alcohol having a saponification degree of 70 to 99.8 mol% is generally used. The degree of saponification of the polyvinyl alcohol is preferably 80 to 99.8 mol%.
The preferable lower limit of the degree of polymerization of the polyvinyl alcohol is 500, and the preferable upper limit is 4000. When the degree of polymerization of the polyvinyl alcohol is 500 or more, the penetration resistance of the obtained laminated glass is high. When the degree of polymerization of the polyvinyl alcohol is 4000 or less, the forming of the interlayer film for laminated glass becomes easy. The more preferable lower limit of the degree of polymerization of the polyvinyl alcohol is 1000, and the more preferable upper limit is 3600.

The aldehyde is not particularly limited, but in general, an aldehyde having 1 to 10 carbon atoms is preferably used. The aldehyde having 1 to 10 carbon atoms is not particularly limited, and for example, n-butyl aldehyde, isobutyl aldehyde, n-barrel aldehyde, 2-ethyl butyraldehyde, n-hexyl aldehyde, n-octyl aldehyde, and n-nonyl aldehyde are not particularly limited. , N-decylaldehyde, formaldehyde, acetaldehyde, benzaldehyde and the like. Of these, n-butyraldehyde, n-hexylaldehyde, and n-barrelaldehyde are preferable, and n-butyraldehyde is more preferable. These aldehydes may be used alone or in combination of two or more.

The adhesive layer preferably contains a plasticizer. The above-mentioned plasticizer is not particularly limited, and for example, an organic ester plasticizer such as a monobasic organic acid ester and a polybasic organic acid ester, a phosphoric acid plasticizer such as an organic phosphoric acid plasticizer and an organic subphosphoric acid plasticizer, and the like. Can be mentioned. The plasticizer is preferably a liquid plasticizer.

The monobasic organic acid ester is not particularly limited, and for example, glycols such as triethylene glycol, tetraethylene glycol, and tripropylene glycol, and butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptyl acid, and n-octyl are used. Examples thereof include glycol esters obtained by reaction with monobasic organic acids such as acid, 2-ethylhexic acid, pelargonic acid (n-nonyl acid) and decyl acid. Among them, triethylene glycol dicaproic acid ester, triethylene glycol di-2-ethylbutyric acid ester, triethylene glycol di-n-octyl acid ester, triethylene glycol di-2-ethylhexyl acid ester and the like are preferable.

The above-mentioned multibasic organic acid ester is not particularly limited, but is an ester compound of, for example, a multibasic organic acid such as adipic acid, sebacic acid, and azelaic acid and an alcohol having a linear or branched structure having 4 to 8 carbon atoms. Can be mentioned. Of these, dibutyl sebacic acid ester, dioctyl azelaic acid ester, dibutyl carbitol adipate ester and the like are suitable.

The organic ester plasticizer is not particularly limited, and triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethylene glycol di-n-octanoate, etc. Triethylene Glycol Di-n-Heptanoate, Tetraethylene Glycol Di-n-Heptanoate, Tetraethylene Glycol Di-2-ethylhexanoate, Dibutyl Sevacate, Dioctyl Azelate, Dibutyl Carbitol Adipate, Ethylene Glycol Di-2-ethyl Butyrate, 1,3-propylene glycol di-2-ethylbutyrate, 1,4-butylene glycol di-2-ethylbutyrate, diethylene glycol di-2-ethylbutyrate, diethylene glycol di-2-ethylhexanoate, Dipropylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylpentanoate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dicapriate, dihexyl adipate, dioctyl adipate, hexyl adipate Cyclohexyl, diisononyl adipate, heptylnonyl adipate, dibutyl sebacate, oil-modified sebacic acid alkyd, adipate ester, adipate ester, alkyl alcohol with 4-9 carbon atoms and 4-9 carbon atoms. Examples thereof include a mixed adipate ester prepared from cyclic alcohol, an adipate ester having 6 to 8 carbon atoms such as adipate hexyl, and the like.

The organophosphate plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecylphenyl phosphate, and triisopropyl phosphate.

Furthermore, since the plasticizer is less likely to cause hydrolysis, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), and tetraethylene glycol di-2- It is preferable to contain ethylhexanoate (4GO) and dihexyl adipate (DHA), and tetraethylene glycol di-2-ethylhexanoate (4GO) and triethylene glycol di-2-ethylhexanoate (3GO). It is more preferable to contain it, and it is more preferable to contain triethylene glycol di-2-ethylhexanoate (3GO).

The content of the plasticizer in the adhesive layer is not particularly limited, but the preferable lower limit is 30 parts by weight and the preferable upper limit is 90 parts by weight with respect to 100 parts by weight of the polyvinyl acetal. When the content of the plasticizer is 30 parts by weight or more, the melt viscosity of the laminated glass interlayer film becomes low, and the degassing property when the laminated glass is manufactured as the laminated glass interlayer film becomes high. When the content of the plasticizer is 90 parts by weight or less, the transparency of the interlayer film for laminated glass becomes high. The more preferable lower limit of the content of the plasticizer is 35 parts by weight, the more preferable upper limit is 70 parts by weight, and the further preferable upper limit is 63 parts by weight.

The adhesive layer preferably contains an adhesive force adjusting agent. By containing the adhesive force adjusting agent, the adhesive force to the glass can be adjusted to obtain a laminated glass having excellent penetration resistance.
As the adhesive strength adjusting agent, for example, an alkali metal salt or an alkaline earth metal salt is preferably used. Examples of the adhesive strength adjusting agent include salts of potassium, sodium, magnesium and the like.
Examples of the acid constituting the salt include organic acids of carboxylic acids such as octyl acid, hexic acid, 2-ethylbutyric acid, butyric acid, acetic acid and formic acid, and inorganic acids such as hydrochloric acid and nitric acid.

When the interlayer film for laminated glass of the present invention is required to have heat-shielding properties, the adhesive layer may contain a heat ray-absorbing agent.
The heat ray absorber is not particularly limited as long as it has the ability to shield infrared rays, but is tin-doped indium oxide (ITO) particles, antimonated tin oxide (ATO) particles, aluminum-doped zinc oxide (AZO) particles, and indium-doped oxidation. At least one selected from the group consisting of zinc (IZO) particles, tin-doped zinc oxide particles, silicon-doped zinc oxide particles, lanthanum borohydride particles, and cerium borohydride particles is suitable.

The adhesive layer may contain conventionally known additives such as an ultraviolet shielding agent, an antioxidant, a light stabilizer, and an antistatic agent, if necessary.

The thickness of the adhesive layer is not particularly limited, but a preferable lower limit is 100 μm and a preferable upper limit is 500 μm. When a plurality of the adhesive layers are present, the preferable lower limit of the total thickness of the adhesive layers is 200 μm, and the preferable upper limit is 1000 μm. When the total thickness and the total thickness of the adhesive layers are within this range, sufficient durability is obtained, and basic qualities such as transparency and anti-penetration of the obtained laminated glass are satisfied. The more preferable lower limit of the thickness of the adhesive layer is 250 μm, and the more preferable upper limit is 400 μm. The more preferable lower limit of the total thickness of the adhesive layers is 500 μm, and the more preferable upper limit is 800 μm.

The interlayer film for laminated glass of the present invention preferably has a transparent conductive layer on the surface of the adhesive layer on the side in contact with the dimming layer. By having such a transparent conductive layer, the light transmittance can be easily changed by applying a voltage to the dimming body layer through the transparent conductive layer.
The transparent conductive layer preferably contains, for example, tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), or the like.

In the interlayer film for laminated glass of the present invention, the peripheral portion of the dimming body layer is sealed with a sealing layer. This makes it possible to prevent the dimming body from seeping out from the dimming body layer during the laminating process.

FIG. 1 shows a schematic view showing an example of a cross section of the interlayer film for laminated glass of the present invention.
The laminated glass interlayer film 1 shown in FIG. 1A has a structure in which the adhesive layer 2, the dimming body layer 3, and the adhesive layer 2 are laminated in this order in the thickness direction. A transparent conductive layer 4 is provided on the surface of the adhesive layer 2 on the side in contact with the dimming body layer 3. In FIG. 1A, the peripheral portion of the dimming body layer 3 is sealed by the seal layer 5. The seal layer 5 is sandwiched between two adhesive layers 2 (transparent conductive layer 4).
The laminated glass interlayer film 10 shown in FIG. 1B has a structure in which the adhesive layer 20, the dimming body layer 30, and the adhesive layer 20 are laminated in this order in the thickness direction. A transparent conductive layer 40 is provided on the surface of the adhesive layer 20 on the side in contact with the dimming body layer 30. In FIG. 1B, the peripheral portion of the dimming body layer 30 is sealed by the seal layer 50. The seal layer 50 is arranged on the peripheral edge of the laminated body including the adhesive layer 20 (transparent conductive layer 40), the dimming body layer 30, and the adhesive layer 20 (transparent conductive layer 40).

The seal layer is not particularly limited as long as it can prevent the dimming body from seeping out from the dimming body layer, but is preferably made of a photocurable resin or a thermosetting resin. If a photocurable resin or a thermosetting resin is used, the photocurable resin or the thermosetting resin is cured before the laminating process to form a seal layer, whereby the dimming body layer is surely sealed by the seal layer. It can be stopped to reliably prevent the dimming body from seeping out. Among them, a sealing agent containing a photocurable resin is more preferable from the viewpoint of handleability.

The photocurable resin is not particularly limited as long as it is cured by irradiation with light, but for example, (meth) acrylic resin, urethane resin and the like are suitable. The (meth) acrylic resin is preferably a polyfunctional (meth) acrylate.
The thermosetting resin is not particularly limited as long as it is cured by heating, but for example, an epoxy resin, an amide resin, or the like is suitable.

The method for producing the interlayer film for laminated glass of the present invention is not particularly limited, and for example, a step of producing two adhesive layers having a transparent conductive layer formed on one surface and a step of forming one transparent conductive layer are formed. A step of applying a sealant containing a photocurable resin in a frame shape to the peripheral edge of the adhesive layer on the transparent conductive layer side, and an adjustment inside the frame of the sealant on the adhesive layer on which the transparent conductive layer is formed. A step of coating a light body to form a dimming body layer and a step of superimposing an adhesive layer on which the other transparent conductive layer is formed so that the transparent conductive layer is on the dimming body layer side to obtain a laminated body. The above-mentioned laminate is irradiated with light to cure the sealant to form a seal layer, and the laminate after the seal layer is formed is pressure-bonded and laminated while applying a temperature of 30 to 100 ° C. The method is suitable.
When the sealant containing the photocurable resin is a so-called post-curable photocurable sealant having a time lag between irradiation with light and curing, the step of obtaining the above-mentioned laminate. Before that, light irradiation may be performed.

Further, for example, a heat-curable resin is applied to the step of producing two adhesive layers having a transparent conductive layer formed on one surface and the peripheral edge portion of the adhesive layer having one transparent conductive layer formed on the transparent conductive layer side. A step of applying the contained sealant in a frame shape, and a step of applying a dimming body to the inside of the sealant frame on the adhesive layer on which the transparent conductive layer is formed to form a dimming body layer. A step of superimposing the adhesive layer on which the other transparent conductive layer is formed so that the transparent conductive layer is on the dimming body layer side to obtain a laminated body, and a step of heating the laminated body to cure the sealing agent to cure the sealing layer. A method having a step of forming the seal layer and a step of crimping and laminating the laminated body after forming the seal layer while applying a temperature of 30 to 100 ° C. is also preferable.
A method for producing an interlayer film for laminated glass is also one of the present inventions.

A laminated glass in which a laminated glass interlayer film of the present invention is laminated between a pair of glass plates is also one of the present inventions.
As the glass plate, a generally used transparent plate glass can be used. For example, inorganic glass such as float plate glass, polished plate glass, template glass, meshed glass, lined plate glass, colored plate glass, heat ray absorbing glass, heat ray reflecting glass, and green glass can be mentioned. Further, an ultraviolet shielding glass having an ultraviolet shielding coat layer on the surface of the glass can also be used. Further, an organic plastic plate such as polyethylene terephthalate, polycarbonate, or polyacrylate can also be used.
Two or more kinds of glass plates may be used as the glass plate. For example, a laminated glass in which an interlayer film for laminated glass of the present invention is laminated between a transparent float plate glass and a colored glass plate such as green glass can be mentioned. Further, as the glass plate, two or more kinds of glass plates having different thicknesses may be used.

According to the present invention, an interlayer film for laminated glass having a dimming body layer but no exudation of the dimming body in the peripheral portion, a laminated glass using the laminated glass interlayer film, and a laminated glass for the laminated glass. A method for producing an interlayer film can be provided.

It is a schematic diagram which shows an example of the cross section of the interlayer film for laminated glass of this invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

(Example 1)
(1) Preparation of adhesive layer and transparent conductive layer Polyvinyl butyral (hydroxyl group content 30 mol%, acetylation degree 1 mol%, butyralization degree 69 mol%, average polymerization degree 1700) as a plasticizer with respect to 100 parts by weight. 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) was added and sufficiently kneaded with a mixing roll to obtain a resin composition. The obtained resin composition was extruded by an extruder to obtain a single-layer resin film having a thickness of 380 μm made of polyvinyl butyral (PVB).
Next, a layer made of tin-doped indium oxide (ITO) having a thickness of 10 μm was formed on a polyethylene terephthalate film having a thickness of 40 μm by a sputtering method and a vapor deposition ion plating method to obtain a transparent conductive layer. The obtained transparent conductive layer and the single-layer resin film are laminated in the order of the single-layer resin film, the transparent conductive layer, and the single-layer resin film in the thickness direction, and then bonded at 80 ° C. to achieve transparent conductivity. An adhesive layer with a layer was obtained. The obtained adhesive layer with a transparent conductive layer was cut into a size of 300 mm in length and 300 mm in width.

(2) Coating of Sealing Agent 100 parts by weight of polyfunctional acrylate as a photocurable resin and 2 parts by weight of benzophenone as an ultraviolet absorber were mixed to prepare a photocurable sealant.
The obtained photocurable sealant was applied in a frame shape on the peripheral edge portion of the adhesive layer with a transparent conductive layer on the transparent conductive layer side by a screen printing method so that the line width was 5 mm.

(3) Formation of dimming body layer A liquid crystal display (STN type liquid crystal (manufactured by DIC)) is used as the dimming body, and a polymer crosslinked body (polyfunctional acrylate polymer) is used at a ratio of 30 parts by weight to 70 parts by weight of the dimming body. ) Was applied to the inside of the frame of the sealant on the obtained adhesive layer with a transparent conductive layer to form a dimming body layer.

(4) Manufacture of Laminated Glass Intermediate Film The adhesive layer with a transparent conductive layer prepared separately is laminated so as to sandwich the dimming body layer of the adhesive layer with a transparent conductive layer on which a dimming body is formed by the transparent electrode layer. I got a body. The obtained laminate was irradiated with ultraviolet rays having a wavelength of 350 nm and an intensity of 1000 mW / cm ² for 10 seconds using a high-pressure mercury lamp to cure the sealant to form a seal layer.
Next, the laminate on which the seal layer was formed was pressure-bonded and laminated while applying a temperature of 40 ° C. to obtain an interlayer film for laminated glass. An interlayer film for laminated glass was produced even under the condition of a laminating temperature of 90 ° C.

(Example 2)
A liquid crystal display (STN type liquid crystal (manufactured by DIC)) is used as the dimming body, and spacer particles (manufactured by Sekisui Chemical Co., Ltd., trade name "Micropearl") are used in a ratio of 0.001 part by weight to 100 parts by weight of the dimming body. An interlayer film for laminated glass was obtained in the same manner as in Example 1 except that a dimming body layer was formed by using a mixture of the above.

(Example 3)
Intermediate for laminated glass in the same manner as in Example 2 except that an ethylene-vinyl acetate copolymer film (manufactured by Sekisui Chemical Co., Ltd.) was used as the single-layer resin film instead of the single-layer resin film made of PVB. Obtained a film.

(Comparative Examples 1 and 2)
An interlayer film for laminated glass was obtained in the same manner as in Examples 1 and 3 except that the sealing layer was not formed.

(evaluation)
The following evaluations were performed on the interlayer films for laminated glass obtained in Examples and Comparative Examples. The results are shown in Table 1.

(1) Evaluation of exudation of the dimming body When the peripheral part of the obtained laminated glass interlayer film is visually observed and no exudation of the dimming body is observed, it is marked as "○". The case where slight exudation was observed was evaluated as "Δ", and the case where exudation was observed was evaluated as "x".
The exudation of the dimming body was evaluated for the interlayer film for laminated glass, which was bonded at 40 ° C. and 90 ° C.

(2) Evaluation of dimmability When a voltage of -2V is applied to the obtained laminated glass interlayer and visually observed, a change in the light transmittance of the laminated glass interlayer is observed. If it was not recognized as "○", it was evaluated as "×".
The light control property was evaluated for a laminated glass interlayer film that was bonded at 40 ° C. However, the evaluation of the dimming property was stopped for Comparative Examples 1 and 2 in which the dimming body had a large exudation.

According to the present invention, an interlayer film for laminated glass having a dimming body layer but no exudation of the dimming body in the peripheral portion, a laminated glass using the laminated glass interlayer film, and a laminated glass for the laminated glass. A method for producing an interlayer film can be provided.

1 Laminated glass interlayer 2 Adhesive layer 3 Dimmer layer 4 Transparent conductive layer 5 Seal layer 10 Laminated glass interlayer 20 Adhesive layer 30 Dimmer layer 40 Transparent conductive layer 50 Seal layer

Claims (10)

It is an interlayer film for laminated glass having a structure in which an adhesive layer, a light control body layer, and an adhesive layer are laminated in this order in the thickness direction, and the peripheral portion of the light control body layer is sealed by a seal layer. A featured interlayer film for laminated glass. The interlayer film for laminated glass according to claim 1, wherein the dimming body layer contains a liquid crystal material. The interlayer film for laminated glass according to claim 1 or 2, wherein the seal layer is made of a photocurable resin or a thermosetting resin. The interlayer film for laminated glass according to claim 1 or 2, wherein the seal layer is made of a photocurable resin. The interlayer film for laminated glass according to claim 1, 2, 3 or 4, wherein the adhesive layer contains a thermoplastic resin. The interlayer film for laminated glass according to claim 5, wherein the thermoplastic resin is a polyvinyl acetal or an ethylene-vinyl acetate copolymer. The interlayer film for laminated glass according to claim 1, 2, 3, 4, 5 or 6, wherein the surface of the adhesive layer on the side in contact with the dimming layer has a transparent conductive layer. A laminated glass having a laminated glass interlayer film according to claim 1, 2, 3, 4, 5, 6 or 7 between a pair of glass plates. The method for producing an interlayer film for laminated glass according to claim 1, 2, 3, 4, 5, 6 or 7.
A sealing agent containing a photocurable resin on the peripheral portion of the adhesive layer on which the transparent conductive layer is formed on one surface and the transparent conductive layer side of the adhesive layer on which the transparent conductive layer is formed. A step of applying a dimming body to the inside of the frame of the sealant on the adhesive layer on which the transparent conductive layer is formed to form a dimming body layer, and a step of forming a dimming body layer, and the other transparent conductive layer. A step of obtaining a laminated body in which the adhesive layer on which the layer is formed is laminated so that the transparent conductive layer is on the dimming body layer side, and a step of irradiating the laminated body with light to cure the sealant to form a seal layer. A method for producing an interlayer film for laminated glass, which comprises a step of forming a seal layer and a step of crimping and laminating the laminated body after forming a seal layer while applying a temperature of 30 to 100 ° C. The method for producing an interlayer film for laminated glass according to claim 1, 2, 3, 4, 5, 6 or 7.
A sealant containing a thermosetting resin on the peripheral portion of the adhesive layer on which the transparent conductive layer is formed on one surface and the transparent conductive layer side of the adhesive layer on which the transparent conductive layer is formed. A step of applying a dimming body to the inside of the frame of the sealant on the adhesive layer on which the transparent conductive layer is formed to form a dimming body layer, and a step of forming a dimming body layer, and the other transparent conductive layer. A step of superimposing the adhesive layer on which the layer is formed so that the transparent conductive layer is on the dimming body layer side to obtain a laminated body, and a step of heating the laminated body to cure the sealant to form a seal layer. A method for producing an interlayer film for laminated glass, which comprises a step of crimping and laminating a laminated body after forming a seal layer while applying a temperature of 30 to 100 ° C.

Images