JP2010100512A - Intermediate film for laminated glass, and laminated glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intermediate film for laminated glass capable of changing a light transmissivity by application of a voltage, and having excellent adhesion to a conductive film. <P>SOLUTION: The intermediate film for laminated glass comprises an electrolyte layer and an electrochromic layer formed on at least one side of the electrolyte layer, in which the electrochromic layer comprises an electrochromic compound and a binder resin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an interlayer film for laminated glass that changes light transmittance by applying a voltage and has excellent adhesion to a conductive film. Further, the present invention relates to a laminated glass using the interlayer film for laminated glass.

A dimmer whose light transmittance is changed by applying a voltage is widely used.
The dimmer is roughly classified into a dimmer using a liquid crystal material and a dimmer using an electrochromic compound. A dimmer using an electrochromic compound is characterized by less light scattering and less polarization than a dimmer using a liquid crystal material.

As a light control body using an electrochromic compound, a light control body in which an electrochromic layer and an electrolyte layer are sandwiched between a pair of opposing electrode substrates has been proposed. For example, in Patent Document 1 and Patent Document 2, a laminate in which three layers of an electrochromic layer containing an inorganic oxide, an ion conductive layer, and an electrochromic layer containing an inorganic oxide are sequentially laminated is two sheets. A light control member sandwiched between conductive substrates is disclosed. Patent Document 3 and Patent Document 4 disclose a light adjuster in which an electrochromic layer containing an organic electrochromic material and an electrolyte layer are sandwiched between a pair of opposing electrode substrates.

In recent years, a laminated glass using a dimmer as an interlayer film for laminated glass has been proposed in order to control the temperature inside a vehicle such as an automobile. It is considered that the light transmittance of the laminated glass can be controlled by using such an interlayer film for laminated glass.
Laminated glass needs to have high penetration resistance in order to ensure safety. In order to impart high penetrability to the laminated glass, high adhesion between the interlayer film for laminated glass and the glass plate is required. However, the conventional dimmer has low adhesion to the glass plate. Therefore, the laminated glass using the conventional light control body has a problem that high penetration resistance cannot be obtained.

JP 2004-062030 A JP 2005-062772 A Japanese translation of PCT publication No. 2002-526801 JP-T-2004-53770

An object of the present invention is to provide an interlayer film for laminated glass that changes light transmittance by applying a voltage and has excellent adhesion to a conductive film. It is another object of the present invention to provide a laminated glass using the interlayer film for laminated glass.

The present invention is an interlayer film for laminated glass having an electrolyte layer and an electrochromic layer formed on at least one side of the electrolyte layer, and the electrochromic layer is a laminated film containing an electrochromic compound and a binder resin. It is an interlayer film for glass.
The present invention is described in detail below.

In the interlayer film for laminated glass of the present invention, an electrolyte layer and an electrochromic layer are laminated. The electrochromic layer may be laminated only on one side of the electrolyte layer, or may be laminated on both sides of the electrolyte layer.
The electrolyte layer applies a voltage to the electrochromic layer by conducting ions. As a result, the light transmittance of the electrochromic layer changes.
Although the said electrolyte layer is not specifically limited, For example, the electrolyte layer containing electrolyte, a solvent, and binder resin is suitable.

The electrolyte is not particularly limited, and inorganic acid anion lithium salts such as lithium perchlorate, lithium borofluoride, and lithium phosphorous fluoride, and organic acid anion lithium salts such as lithium trifluoromethanesulfonate and lithium bistrifluoromethanesulfonate imide are used. Can be mentioned.
The electrolyte may be a salt of an ammonium cation and an anion.
The ammonium cation is not particularly limited, and alkylammonium cations such as tetraethylammonium, trimethylethylammonium, methylpropylpyrrolidinium, methylbutylpyrrolidinium, methylpropylpiperidinium, methylbutylpiperidinium, and ethylmethylimidazolium. , Dimethylethylimidazolium, methylpyridinium, ethylpyridinium, propylpyridinium, butylpyridinium, and the like.
The anion is not particularly limited, and examples thereof include perchlorate anion, borofluoride anion, phosphofluoride anion, trifluoromethanesulfonate anion, and bistrifluoromethanesulfonate imide anion.

The concentration of the electrolyte in the electrolyte layer is not particularly limited, but a preferred lower limit is 0.5% by weight and a preferred upper limit is 30% by weight. If the concentration of the electrolyte is less than 0.5% by weight, the ionic conductivity is lowered, so that the light transmittance of the electrochromic layer may not change even when a voltage is applied. When the concentration of the electrolyte exceeds 30% by weight, the responsiveness of the electrochromic layer may be lowered. A more preferable lower limit of the electrolyte concentration is 1% by weight, and a more preferable upper limit is 25% by weight.

The solvent used in the electrolyte layer is not particularly limited, and examples thereof include esters such as acetonitrile, nitromethane, propylene carbonate, ethylene carbonate, butylene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, and γ-butyrolactone, tetrahydrofuran, -Substituted tetrahydrofurans such as methyltetrahydrofuran, 1,3-dioxolane, 4,4-dimethyl-1,3-dioxolane, t-butyl ether, isobutyl ether, 1,2-dimethoxyethane, 1,2-ethoxymethoxyethane, etc. Ethers such as ethylene glycol, polyethylene glycol sulfolane, 3-methylsulfolane, methyl formate, methyl acetate, N-methylpyrrolidone, dimethylformamide, etc. And the like.

Examples of the solvent used for the electrolyte layer include triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), tetraethylene glycol di-2-ethylhexanoate. Examples thereof include liquid plasticizers such as ate (4GO) and dihexyl adipate (DHA). By using the liquid plasticizer as the solvent, flexibility can be imparted to the electrolyte layer.

The concentration of the solvent in the electrolyte layer is not particularly limited, but a preferred lower limit is 5% by weight and a preferred upper limit is 55% by weight. When the concentration of the solvent is less than 5% by weight, the ion conductivity is lowered, so that the light transmittance of the electrochromic layer may not change even when a voltage is applied. When the concentration of the solvent exceeds 55% by weight, the electrolyte layer may not be able to maintain the membrane shape. A more preferable lower limit of the concentration of the solvent is 10% by weight, and a more preferable upper limit is 50% by weight.

The binder resin used for the electrolyte layer is not particularly limited. For example, polyvinylidene fluoride, polytetrafluoroethylene, vinylidene fluoride-hexafluoropropylene copolymer, polytrifluoride ethylene, acrylonitrile-butadiene-styrene copolymer Examples thereof include coalescence, polyester, polyether, polyamide, polycarbonate, polyacrylate, polymethacrylate, polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyvinyl acetal, and ethylene-vinyl acetate copolymer. Among these, polyvinyl acetal and ethylene-vinyl acetate copolymer are preferable, and polyvinyl acetal is more preferable. In particular, since a highly transparent electrolyte layer is obtained, the binder resin is preferably polyvinyl butyral.

The concentration of the binder resin in the electrolyte layer is not particularly limited, but a preferred lower limit is 15% by weight and a preferred upper limit is 94.5% by weight. When the concentration of the binder resin is less than 15% by weight, the electrolyte layer may not be able to maintain the film shape. When the concentration of the binder resin exceeds 94.5% by weight, the ionic conductivity is lowered, and thus the light transmittance of the electrochromic layer may not change even when a voltage is applied.

The electrolyte layer may have a single layer structure or a multilayer structure.
The electrolyte layer having a multilayer structure means a structure in which two or more electrolyte layers are laminated.
When the electrolyte layer has a multilayer structure, the electrolyte layer includes the electrolyte, polyvinyl acetal as the binder resin, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethyl. It is preferable to contain at least one liquid plasticizer selected from the group consisting of butyrate (3GH), tetraethylene glycol di-2-ethylhexanoate (4GO), and dihexyl adipate (DHA).
For example, by laminating electrolyte layers having different contents of the liquid plasticizer or by laminating electrolyte layers containing polyvinyl acetals having different hydroxyl amounts as the binder resin, the sound insulation of the resulting laminated glass is improved. Can do.

Although the thickness of the said electrolyte layer is not specifically limited, A preferable minimum is 0.1 mm and a preferable upper limit is 3.0 mm. If the thickness of the electrolyte layer is less than 0.1 mm, the light transmittance may not change even when a voltage is applied to the electrochromic layer. If the thickness exceeds 3.0 mm, the voltage is applied to the electrochromic layer. When is applied, the rate of change of light transmittance may decrease. A more preferable lower limit of the thickness of the electrolyte layer is 0.3 mm, and a more preferable upper limit is 1.0 mm.

The method for forming the electrolyte layer is not particularly limited. For example, after preparing a solution in which the electrolyte is dissolved in the solvent, and mixing the obtained solution with the binder resin, the mixture is heated by a method such as hot pressing. Examples thereof include a method for forming an electrolyte layer.

The electrochromic layer contains an electrochromic compound and a binder resin. By using an electrochromic compound and a binder resin in combination, the electrochromic layer can exhibit high adhesion to a glass plate or a conductive film. Moreover, since moderate softness | flexibility is provided, even if it applies to the laminated glass etc. which have a curved surface, the intermediate film for laminated glasses does not break.

The electrochromic compound is not particularly limited as long as it is a compound having electrochromic properties, and may be an inorganic compound or an organic compound. Note that having an electrochromic property means having a property of changing light transmittance by applying a voltage.
Examples of the inorganic compound having electrochromic properties include Mo ₂ O ₃ , Ir ₂ O ₃ , NiO, V ₂ O ₅ , and WO ₃ .
Examples of the organic compound having electrochromic properties include polypyrrole, polyacetylene, polythiophene, polyparaphenylene vinylene, polyaniline, polyacetylene, polyethylene dioxythiophene, metal phthalocyanine, viologen, viologen salt, ferrocene, dimethyl terephthalate, diethyl terephthalate, and the like. Is mentioned. Of these, polyacetylene is preferable, and polyacetylene having an aromatic side chain is more preferable.

The polyacetylene having the aromatic side chain has electrochromic properties and electrical conductivity, and can easily form an electrochromic layer. Therefore, if polyacetylene having an aromatic side chain is used, an electrochromic layer having excellent light control performance can be easily formed. In addition, polyacetylene having an aromatic side chain exhibits a change in absorption characteristics due to a change in structure. As a result, since the absorption spectrum extends to the near infrared wavelength region, the electrochromic layer has excellent light control performance over a wide wavelength region.

The polyacetylene having the aromatic side chain is not particularly limited, but for example, polyacetylene having a mono- or di-substituted aromatic in the side chain is preferable.

Although the substituent which comprises the said aromatic side chain is not specifically limited, For example, phenyl, p-fluorophenyl, p-chlorophenyl, p-bromophenyl, p-iodophenyl, p-hexylphenyl, p-octylphenyl, p -Cyanophenyl, p-acetoxyphenyl, p-acetophenyl, biphenyl, o- (dimethylphenylsilyl) phenyl, p- (dimethylphenylsilyl) phenyl, o- (diphenylmethylsilyl), p- (diphenylmethylsilyl) phenyl O- (triphenylsilyl) phenyl, p- (triphenylsilyl) phenyl, o- (tolyldimethylsilyl) phenyl, p- (tolyldimethylsilyl) phenyl, o- (benzyldimethylsilyl) phenyl, p- (benzyl Dimethylsilyl) phenyl, o- (phenethyl) Phenyl groups such as (dimethylsilyl) phenyl, p- (phenethyldimethylsilyl) phenyl, biphenyl groups, 1-naphthyl, 2-naphthyl, 1- (4-fluoro) naphthyl, 1- (4-chloro) naphthyl, 1 Naphthyl groups such as-(4-bromo) naphthyl, 1- (4-hexyl) naphthyl, 1- (4-octyl) naphthyl, naphthalene groups, 1-anthracene, 1- (4-chloro) anthracene, 1- Examples include an anthracene group such as (4-octyl) anthracene, a phenanthrene group such as 1-phenanthrene, a fluorene group such as 1-fluorene, a perylene group such as 1-perylene, and the like.

The binder resin used in the electrochromic layer is not particularly limited. For example, polyvinylidene fluoride, polytetrafluoroethylene, vinylidene fluoride-hexafluoropropylene copolymer, polytrifluoride ethylene, acrylonitrile-butadiene-styrene copolymer Examples of the polymer include polyester, polyether, polyamide, polycarbonate, polyacrylate, polymethacrylate, polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyvinyl acetal, and ethylene-vinyl acetate copolymer. Among these, polyvinyl acetal and ethylene-vinyl acetate copolymer are preferable, and polyvinyl acetal is more preferable. In particular, since an electrochromic layer having high transparency can be obtained, the binder resin is preferably polyvinyl butyral.

The concentration of the electrochromic compound in the electrochromic layer is not particularly limited, but a preferred lower limit is 1% by weight and a preferred upper limit is 95% by weight. When the concentration of the electrochromic compound is less than 1% by weight, the light transmittance may not be changed by applying a voltage. When the concentration exceeds 95% by weight, the obtained glass plate of the interlayer film for laminated glass is obtained. And sufficient adhesion to the conductive film may not be obtained. A more preferable lower limit of the concentration of the electrochromic compound is 10% by weight, and a more preferable upper limit is 90% by weight.

Although the thickness of the said electrochromic layer is not specifically limited, A preferable minimum is 0.05 micrometer and a preferable upper limit is 2 micrometers. When the thickness of the electrochromic layer is less than 0.05 μm, the light transmittance may not be sufficiently changed even when a voltage is applied to the electrochromic layer. When the thickness exceeds 2 μm, the interlayer film for laminated glass Transparency may be reduced. A more preferable lower limit of the thickness of the electrochromic layer is 0.1 μm, and a more preferable upper limit is 1 μm.

The electrolyte layer or the electrochromic layer may contain heat shielding fine particles.
The thermal barrier fine particles are not particularly limited as long as they have the ability to shield infrared rays, but tin-doped indium oxide fine particles, antimony-doped tin oxide fine particles, zinc oxide fine particles doped with elements other than zinc, lanthanum hexaboride fine particles, At least one selected from the group consisting of fine particles of zinc antimonate and an infrared absorber having a phthalocyanine structure is preferred.
In addition, the laminated glass obtained using the electrochromic layer containing the said heat insulation fine particle can improve the response speed of an electrochromic layer.

The electrolyte layer or the electrochromic layer may contain an adhesion adjusting agent.
Examples of the adhesive force adjusting agent include alkali metal salts and alkaline earth metal salts. Among them, alkali metal salts and alkaline earth metal salts of carboxylic acids having 2 to 16 carbon atoms are preferable.
Specific examples include magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, magnesium 2-ethylbutanoate, potassium 2-ethylbutanoate, magnesium 2-ethylhexanoate, and potassium 2-ethylhexanoate.
These adhesive force regulators may be used alone or in combination.

The interlayer film for laminated glass of the present invention has, in addition to the electrolyte layer and the electrochromic layer, an ultraviolet absorbing layer containing an ultraviolet absorber, an infrared absorbing layer containing heat shielding fine particles, and the like as necessary. May be.

The interlayer film for laminated glass of the present invention preferably has an embossed surface.
The roughness of the emboss is not particularly limited, but the ten-point average roughness defined by JIS B 0601 is preferably in the range of 20 to 50 μm.

The method for producing the interlayer film for laminated glass of the present invention is not particularly limited. For example, a solution obtained by dissolving the electrochromic compound and the binder resin in an appropriate solvent is coated on the electrolyte layer using a coater or the like. A method of coating and drying, or a method of forming a mixture of a solution obtained by dissolving the electrochromic compound in an appropriate solvent and a binder resin into an electrochromic layer using an extruder and laminating the mixture on the electrolyte layer Etc.

A laminated glass sandwiched between a pair of glass plates in which the intermediate film for laminated glass of the present invention is formed with a conductive film is also one aspect of the present invention.
The glass plate used for the laminated glass of the present invention is not particularly limited as long as the conductive film is formed on at least one side, and the transparent conductive film is preferably formed on at least one side. Examples of the transparent conductive film include a tin-doped indium oxide (ITO) film.

The said glass plate can use the transparent plate glass generally used. Examples thereof include inorganic glass such as float plate glass, polished plate glass, template glass, netted glass, wire-containing plate glass, colored plate glass, heat ray absorbing glass, heat ray reflecting glass, and green glass. Moreover, organic plastics boards, such as a polyethylene terephthalate, a polycarbonate, a polyacrylate, can also be used.
Two or more types of glass plates may be used as the glass plate.
For example, the laminated glass which pinched | interposed the intermediate film for laminated glasses of this invention with the transparent float plate glass and the colored glass plate like green glass is mentioned.
Moreover, you may use the glass plate from which 2 or more types of thickness differs as said glass plate.

In the laminated glass of the present invention, the interlayer film for laminated glass of the present invention is sandwiched between a pair of glass plates on which a conductive film is formed, and the interlayer film for laminated glass of the present invention and the conductive film It is preferable that they are arranged so as to be in contact with each other.

The surface density of the laminated glass of the present invention is not particularly limited, but is preferably 12 kg / m ² or less.

The laminated glass of the present invention can be used as a windshield, a side glass, a rear glass, a roof glass, or a panoramic glass when used as an automotive glass.

ADVANTAGE OF THE INVENTION According to this invention, the transmittance | permeability of light changes by applying a voltage, and can provide the intermediate film for laminated glasses excellent in the adhesiveness with respect to an electrically conductive film. Moreover, the laminated glass which uses this intermediate film for laminated glasses can be provided.

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

Example 1
(1) Preparation of electrolyte layer An electrolyte solution in which 0.3 g of lithium perchlorate was dissolved in 4 g of propylene carbonate was prepared. The total amount of the obtained electrolyte solution was added to and mixed with 10 g of polyvinyl butyral resin, and then the resulting mixture was pressed with a hot press at 120 ° C. and 100 kg / cm ² for 10 minutes to obtain a thickness of 0.8 mm. An electrolyte layer was obtained.

(2) Preparation of poly (9-ethynyl-10-n-octadecylphenanthrene) A 1.6 mol / L hexane solution of normal butyllithium was added to 30 mL of a tetrahydrofuran solution in which 3 g of 9-ethynylphenanthrene was dissolved at −50 ° C. in a nitrogen atmosphere. Added. Next, after cooling to −90 ° C., 15 mL of a tetrahydrofuran solution in which 1.8 g of potassium tertiary butoxide was dissolved was added, stirred at −80 ° C. for 1 hour, and heated to 5 ° C. Then, 5.6 g of 1-iodooctadecane was added dropwise at −70 ° C., and the mixture was stirred at −30 ° C. for 12 hours. 100 mL of water was added dropwise at 0 ° C., hexane was added, and the resulting compound was extracted. This hexane layer was washed with 300 mL of distilled water three times, dried over anhydrous magnesium sulfate for 1 hour, filtered, and then the solvent was distilled off. After column purification, the solvent was distilled off, and 3.5 g of 9-ethynyl-10-n-octadecylphenanthrene was obtained by column purification using hexane as a developing solvent.
The obtained 9-ethynyl-10-n-octadecylphenanthrene was analyzed by ¹ H-NMR (270 MHz, CDCl ₃ ). As a result, δ8.7 (2H), 8.5 (1H), 8.1 (1H ), 7.7 (4H), 3.7 (1H), 3.5 (2H), 1.7 (2H), 1.6 (30H), and 1.0 (3H).

0.35 g of the obtained 9-ethynyl-10-n-octadecylphenanthrene was polymerized using a WCl ₆ catalyst to obtain 0.27 g of poly (9-ethynyl-10-n-octadecylphenanthrene).

(3) Production of interlayer film for laminated glass 7 mg of poly (9-ethynyl-10-n-octadecylphenanthrene) obtained and polyvinyl butyral resin (average degree of polymerization 1700, degree of butyralization 68.5 mol%, hydroxyl group content (30.6 mol%, acetylation degree 0.9 mol%) 3 mg was dissolved in 0.6 mL of toluene, and applied on the above electrolyte layer with a control coater so that the thickness after drying was 0.5 μm. And dried to obtain an interlayer film for laminated glass.

(Example 2)
9 mg of poly (9-ethynyl-10-n-octadecylphenanthrene) and polyvinyl butyral resin (average polymerization degree 1700, butyralization degree 68.5 mol%, hydroxyl group content 30.6 mol%, acetylation degree 0.9 mol) %) 1 mg in toluene was dissolved in 0.6 mL of toluene, applied to the above electrolyte layer with a control coater so that the thickness after drying was 0.5 μm, and then dried in the same manner as in Example 1. An interlayer film for laminated glass was obtained.

(Example 3)
1 mg of poly (9-ethynyl-10-n-octadecylphenanthrene) and polyvinyl butyral resin (average polymerization degree 1700, butyralization degree 68.5 mol%, hydroxyl group content 30.6 mol%, acetylation degree 0.9 mol) %) 9 mg was dissolved in 0.6 mL of toluene, applied to the electrolyte layer with a control coater so that the thickness after drying was 0.5 μm, and then dried by the same method as in Example 1. An interlayer film for laminated glass was obtained.

Example 4
(1) Synthetic tungsten peroxide 8g, tungsten-cooled 30wt% hydrogen peroxide 100mL, and pure water 100mL were mixed and dissolved. The solution was dissolved and filtered, and excess hydrogen peroxide was decomposed using platinum black net. The filtrate was concentrated with a rotary evaporator to obtain 8.3 g of tungstic peroxide.
(2) Production of interlayer film for laminated glass 9 mg of obtained tungstic acid peroxide and polyvinyl butyral resin (average polymerization degree 1700, butyralization degree 68.5 mol%, hydroxyl group content 30.6 mol%, acetylation degree 0.9 mol%) 1 mg was dissolved in 0.6 mL of ethanol and applied to the electrolyte layer with a control coater so that the thickness after drying was 0.5 μm. An interlayer film for laminated glass was obtained by the method described above.

(Comparative Example 1)
10 mg of poly (9-ethynyl-10-n-octadecylphenanthrene) was dissolved in 0.6 mL of toluene, applied on the electrolyte layer with a control coater so that the thickness after drying was 0.5 μm, and then dried. Except for the above, an interlayer film for laminated glass was obtained in the same manner as in Example 1.

(Comparative Example 2)
Except that 10 mg of tungstic peroxide obtained in Example 4 was dissolved in 0.6 mL of ethanol, applied with a control coater so that the thickness after drying was 0.5 μm on the electrolyte layer, and then dried. An interlayer film for laminated glass was obtained in the same manner as in Example 1.

The interlayer films for laminated glass obtained in Examples 1 to 4 and Comparative Examples 1 and 2 were sandwiched between two sheets of glass (surface resistance 100Ω / □) on which an ITO transparent conductive film was formed, A laminated glass was formed by pressure bonding with a vacuum laminator. In addition, it laminated | stacked so that the intermediate film for laminated glasses and ITO transparent conductive film might contact, and the laminated glass was obtained.

(Evaluation)
The laminated glass obtained in Examples 1 to 4 and Comparative Examples 1 and 2 was evaluated by the following method.

(1) Evaluation of electrochromic property A DC voltage of +2 V was applied to the obtained laminated glass electrode, and then a DC voltage of -2 V was applied. It confirmed that the transmittance | permeability of the laminated glass obtained in Examples 1-4 and Comparative Examples 1 and 2 changed.

(2) Evaluation of Adhesiveness with Transparent Conductive Film The obtained interlayer film for laminated glass has an electrochromic layer side on the glass (surface resistance 100Ω / □) side on which an ITO transparent conductive film is formed, and an electrolyte layer side has polyethylene terephthalate. (PET) The film was sandwiched between the glass and the PET film so as to be on the film side, and pressure-bonded with a 130 ° C. vacuum laminator. Thereafter, only the PET film was peeled off to obtain a sample for peel test (length 10 mm × width 150 mm).

A peel test was conducted with a tensile tester to evaluate the adhesion between the transparent conductive film and the interlayer film for laminated glass on the electrochromic layer side. The test conditions were a peeling angle of 90 degrees, a temperature of room temperature, and a peeling speed of 300 mm / second. The results are shown in Table 1.

ADVANTAGE OF THE INVENTION According to this invention, the transmittance | permeability of light changes by applying a voltage, and can provide the intermediate film for laminated glasses excellent in the adhesiveness with respect to an electrically conductive film. Moreover, the laminated glass which uses this intermediate film for laminated glasses can be provided.

Claims (5)

An interlayer film for laminated glass having an electrolyte layer and an electrochromic layer formed on at least one side of the electrolyte layer,
The said electrochromic layer contains an electrochromic compound and binder resin, The intermediate film for laminated glasses characterized by the above-mentioned. The interlayer film for laminated glass according to claim 1, wherein the binder resin is polyvinyl acetal. The interlayer film for laminated glass according to claim 1 or 2, wherein the electrochromic compound is polyacetylene having an aromatic side chain. The interlayer film for laminated glass according to claim 1, wherein the electrolyte layer contains an electrolyte, a solvent, and a binder resin. A laminated glass, wherein the interlayer film for laminated glass according to claim 1, 2, 3, or 4 is sandwiched between glass plates on which a pair of conductive films are formed.