JP2011126733A - Interlayer for laminated glass and laminated glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interlayer for laminated glass, the light transmittance of which is changed by applying a voltage thereto and which has excellent handleability, and to provide the laminated glass obtained by using the interlayer for laminated glass. <P>SOLUTION: The interlayer for laminated glass has an electrochromic layer containing an electrochromic compound, an electrolyte layer formed on at least one surface of the electrochromic layer, and a covering layer formed on the opposite surface of the electrolyte layer to the electrochromic layer. The electrolyte layer contains a thermoplastic resin, supporting electrolyte salt and a solvent and the content of the solvent is 47-160 parts weight based on 100 parts weight of the thermoplastic resin. The covering layer contains a thermoplastic resin, supporting electrolyte salt and a solvent and the content of the solvent is ≤45 parts weight based on 100 parts weight of the thermoplastic resin. The covering layer has ≤0.48 mm thickness. The opposite surface of the covering layer to the electrolyte layer is embossed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to an interlayer film for laminated glass that changes light transmittance by applying a voltage and is excellent in handleability, and 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, Patent Document 1 and Patent Document 2 include two laminates 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. 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, it has been proposed to use laminated glass using a dimmer as an interlayer film for laminated glass for automobile window glass and architectural window glass. If such an interlayer film for laminated glass is used, it is considered that the light transmittance of the laminated glass can be controlled to adjust the temperature in the vehicle or the room.

When a laminated glass is manufactured using the light control body as an interlayer film for laminated glass, a step of vacuum pressing a laminate in which the light control body is once sandwiched between glass plates on which a pair of conductive films are formed is performed. However, since the conventional dimmer has an electrolyte layer containing a large amount of solvent in order to exhibit high ionic conductivity, there is a problem that the surface of the electrolyte layer is sticky and lacks in handleability. In particular, when the electrolyte layer of the light control body is bonded to the glass plate, there is a problem that it cannot be peeled even if it is reapplied to adjust the position.

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 is excellent in handleability, and a laminated glass using the interlayer film for laminated glass. And

The present invention relates to an electrochromic layer containing an electrochromic compound, an electrolyte layer formed on at least one surface of the electrochromic layer, and a coating layer formed on the surface of the electrolyte layer opposite to the electrochromic layer side And the electrolyte layer contains a thermoplastic resin, a supporting electrolyte salt and a solvent, and the solvent content is 47 to 160 parts by weight relative to 100 parts by weight of the thermoplastic resin. The coating layer contains a thermoplastic resin, a supporting electrolyte salt and a solvent, and the content of the solvent with respect to 100 parts by weight of the thermoplastic resin is 45 parts by weight or less, and the coating layer has a thickness of 0.48 mm. The interlayer film for laminated glass has the following and an embossed surface on the surface opposite to the electrolyte layer side.
The present invention is described in detail below.

The present inventor has studied to provide a coating layer on the surface of the electrolyte layer in order to solve the problems of the conventional dimmer. By providing the coating layer, excessive adhesiveness due to the electrolyte layer can be relaxed, and handleability can be improved. However, when the coating layer is provided, there is a problem that the light transmittance cannot be changed even when a voltage is applied due to a decrease in ion conductivity.
Therefore, the inventor made the electrochromic property by setting the solvent concentration in the coating layer within a certain range, the thickness of the coating layer within a certain range, and further embossing the surface of the coating layer. The present inventors have found that the handleability can be improved without affecting the present invention.

The interlayer film for laminated glass of the present invention includes an electrochromic layer containing an electrochromic compound, an electrolyte layer formed on at least one side of the electrochromic layer, and a surface opposite to the electrochromic layer side of the electrolyte layer. And a coating layer formed thereon.

The electrochromic compound contained in the electrochromic layer 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.

Inorganic compounds having the electrochromic properties, for _{example, Mo 2 O 3, Ir 2} O 3, NiO, V 2 O 5, WO 3 and the like.
Examples of the organic compounds having electrochromic properties include polypyrrole compounds, polyacetylene compounds, polythiophene compounds, polyparaphenylene vinylene compounds, polyaniline compounds, polyethylene dioxythiophene compounds, metal phthalocyanine compounds, viologen compounds, viologen salt compounds, ferrocene compounds, A dimethyl terephthalate compound, a diethyl terephthalate compound, etc. are mentioned. Among these, a polyacetylene compound is preferable, and a polyacetylene compound having an aromatic side chain is more preferable.

The polyacetylene compound having an aromatic side chain has electrochromic properties and electrical conductivity, and can easily form an electrochromic layer. Therefore, if a polyacetylene compound having an aromatic side chain is used, an electrochromic layer having excellent light control performance can be easily formed. Moreover, the polyacetylene compound which has an aromatic side chain shows the change of an absorption characteristic, when a structure changes. 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 compound having an aromatic side chain is not particularly limited, and for example, a polyacetylene compound having a mono- or di-substituted aromatic in the side chain is suitable.
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 electrochromic layer may contain a heat ray absorbent or an adhesive strength modifier.
The heat ray absorber is not particularly limited as long as it has 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.

Examples of the adhesive strength adjusting agent include alkali metal salts and alkaline earth metal salts. Of these, alkali metal salts and alkaline earth metal salts of carboxylic acids having 2 to 16 carbon atoms are preferred, and specific examples include magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, and 2-ethylbutanoic acid. Examples include magnesium, potassium 2-ethylbutanoate, magnesium 2-ethylhexanoate, and potassium 2-ethylhexanoate. These adhesive force regulators may be used alone or in combination.

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 has a role of applying a voltage to the electrochromic layer by conducting ions to change the light transmittance of the electrochromic layer.
The electrolyte layer contains a thermoplastic resin, a supporting electrolyte salt, and a solvent. The electrolyte layer is preferably formed using a resin composition containing a thermoplastic resin, a supporting electrolyte salt, and a solvent (hereinafter also referred to as “resin composition for electrolyte layer”).

The thermoplastic resin is not particularly limited. For example, polyvinylidene fluoride, polytetrafluoroethylene, vinylidene fluoride-hexafluoropropylene copolymer, polytrifluoride ethylene, acrylonitrile-butadiene-styrene copolymer, polyester, Examples include polyether, polyamide, polycarbonate, polyacrylate, polymethacrylate, polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyvinyl acetal resin, and ethylene-vinyl acetate copolymer. Of these, polyvinyl acetal resins and ethylene-vinyl acetate copolymers are preferable, and polyvinyl acetal resins are more preferable. Since an electrolyte layer with high transparency is obtained, a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 4 or 5 carbon atoms is more preferable.

The polyvinyl acetal resin preferably has an acetyl group content of 15 mol% or less. When the amount of acetyl groups in the polyvinyl acetal resin exceeds 15 mol%, the interlayer film for laminated glass may be whitened.
The polyvinyl acetal resin preferably has a hydroxyl group content of 30 mol% or less. When the amount of hydroxyl groups in the polyvinyl acetal resin exceeds 30 mol%, the compatibility with the solvent may be lowered, and the transparency of the electrolyte layer may be lowered.
The acetyl group amount and the hydroxyl group amount can be determined by a titration method according to JIS K 6728.

The polyvinyl acetal resin is obtained by acetalizing polyvinyl alcohol with an aldehyde. The aldehyde is preferably an aldehyde having 4 or 5 carbon atoms.
The preferable lower limit of the average degree of polymerization of the polyvinyl alcohol is 500, and the preferable upper limit is 5000. If the average degree of polymerization of the polyvinyl alcohol is less than 500, the shape of the electrolyte layer may not be maintained. If the average degree of polymerization exceeds 5000, the ionic conductivity decreases, and the light of the electrochromic layer is applied even when a voltage is applied. The transmittance may not change.
The average degree of polymerization of the polyvinyl alcohol is determined by dividing the weight average molecular weight of the polyvinyl alcohol obtained by polystyrene conversion by GPC method (gel permeation chromatography) by the molecular weight per segment of polyvinyl alcohol.

The supporting electrolyte salt is not particularly limited, and is an inorganic acid anion lithium salt such as lithium perchlorate, lithium borofluoride, or lithium phosphofluoride, or an organic acid anion lithium such as lithium trifluoromethanesulfonate or lithium bistrifluoromethanesulfonate imide. Salt.

The supporting electrolyte salt may be a salt of an ammonium cation and an anion.
The ammonium cation is not particularly limited, and examples thereof include alkylammonium cations such as tetraethylammonium, trimethylethylammonium, methylpropylpyrrolidinium, methylbutylpyrrolidinium, methylpropylpiperidinium, methylbutylpiperidinium, and ethylmethyl Examples include imidazolium, dimethylethylimidazolium, methylpyridinium, ethylpyridinium, propylpyridinium, and butylpyridinium.
The anion is not particularly limited, and examples thereof include perchlorate anion, borofluoride anion, phosphofluoride anion, trifluoromethanesulfonate anion, and bistrifluoromethanesulfonate imide anion.

The blending amount of the supporting electrolyte salt in the electrolyte layer is preferably 3 parts by weight with respect to 100 parts by weight of the thermoplastic resin, and 60 parts by weight with respect to the preferred upper limit. When the amount of the supporting electrolyte salt is less than 3 parts by weight, the ionic conductivity becomes low, and the light transmittance of the electrochromic layer may not change even when a voltage is applied, and exceeds 60 parts by weight. As a result, the responsiveness of the electrochromic layer may be lowered. A more preferable lower limit of the amount of the supporting electrolyte salt is 10 parts by weight, and a more preferable upper limit is 50 parts by weight.

The solvent contained in the electrolyte layer is not particularly limited, for example, ester compounds such as acetonitrile, nitromethane, propylene carbonate, ethylene carbonate, butylene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, γ-butyrolactone, tetrahydrofuran, Substituted tetrahydrofuran compounds such as 2-methyltetrahydrofuran, 1,3-dioxolane, 4,4-dimethyl-1,3-dioxolane, t-butyl ether, isobutyl ether, 1,2-dimethoxyethane, 1,2-ethoxymethoxyethane Ether compounds such as ethylene glycol, polyethylene glycol sulfolane, 3-methylsulfolane, methyl formate, methyl acetate, N-methylpyrrolidone, dimethylformamide Organic solvents and the like.

The solvent contained in the electrolyte layer may be a plasticizer. By using the plasticizer as the solvent, flexibility can be imparted to the electrolyte layer.
The plasticizer is not particularly limited. For example, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), tetraethylene glycol di-2-ethylhexanoate Ate (4GO), dihexyl adipate (DHA) and the like.

The lower limit of the amount of the solvent in the electrolyte layer is 47 parts by weight and the upper limit is 160 parts by weight with respect to 100 parts by weight of the thermoplastic resin. When the amount of the solvent is less than 47 parts by weight, the ionic conductivity is lowered, and the light transmittance of the electrochromic layer does not change even when a voltage is applied. When the amount exceeds 160 parts by weight, the electrolyte layer However, the film shape cannot be maintained. The minimum with the preferable compounding quantity of the said solvent is 50 weight part, and a preferable upper limit is 150 weight part.

The electrolyte layer may contain a heat ray absorbent or an adhesive strength modifier. The said heat ray absorber can use the heat ray absorber similar to the heat ray absorber contained in the said electrochromic layer. The said adhesive force regulator can use the adhesive force modifier similar to the adhesive force regulator contained in the said electrochromic layer.

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, for example, an electrolyte layer having a different plasticizer content as the solvent is laminated, or an electrolyte layer containing a polyvinyl acetal resin having a different hydroxyl amount as the thermoplastic resin is laminated. By doing so, the sound insulation etc. of the laminated glass obtained can be improved.

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. When 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. When 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 of forming the electrolyte layer is not particularly limited. For example, after preparing a solution in which the supporting electrolyte salt is dissolved in the solvent, and mixing the obtained solution with the thermoplastic resin, the mixture is subjected to hot pressing or the like. And a method of forming an electrolyte layer by extruding the mixture with an extruder.

The coating layer is formed on the surface of the electrolyte layer opposite to the electrochromic layer side. By providing the coating layer, excessive adhesion of the electrolyte layer can be suppressed, and handling properties can be improved.
The said coating layer contains a thermoplastic resin, supporting electrolyte salt, and a solvent similarly to the said electrolyte layer. The coating layer is preferably formed of a resin composition containing a thermoplastic resin, a supporting electrolyte salt and a solvent (hereinafter also referred to as “resin composition for coating layer”). Here, the content of the solvent contained in the coating layer is smaller than the content of the solvent contained in the electrolyte layer. By suppressing the content of the solvent, the coating layer can suppress the adhesive force as compared with the electrolyte layer. On the other hand, by suppressing the content of the solvent, the coating layer has lower ionic conductivity than the electrolyte layer. As a result of studying the thickness of the coating layer embossed on the surface and the content of the solvent in the coating layer, the present inventor has found that there is a range in which both electrochromic properties and handleability can be achieved.

The thermoplastic resin, supporting electrolyte salt, and solvent contained in the coating layer are not particularly limited, and the same materials as those used for the electrolyte layer can be used.
The blending amount of the supporting electrolyte salt in the coating layer is preferably 3 parts by weight with respect to 100 parts by weight of the thermoplastic resin, and 60 parts by weight with respect to the preferred upper limit. When the amount of the supporting electrolyte salt is less than 3 parts by weight, the ionic conductivity becomes low, and the light transmittance of the electrochromic layer may not change even when a voltage is applied, and exceeds 60 parts by weight. As a result, the responsiveness of the electrochromic layer may be lowered. A more preferable lower limit of the amount of the supporting electrolyte salt is 10 parts by weight, and a more preferable upper limit is 50 parts by weight.

The amount of the solvent in the coating layer is 45 parts by weight or less with respect to 100 parts by weight of the thermoplastic resin. If the amount of the solvent exceeds 45 parts by weight, the embossed shape of the surface cannot be maintained, and the effect of improving the handleability cannot be obtained. The minimum with the preferable compounding quantity of the said solvent is 25 weight part, and a preferable upper limit is 40 weight part.

The said coating layer may contain a heat ray absorber and an adhesive force regulator.
The said heat ray absorber can use the heat ray absorber similar to the heat ray absorber contained in the said electrochromic layer. The said adhesive force regulator can use the adhesive force modifier similar to the adhesive force regulator contained in the said electrochromic layer.

The upper limit of the thickness of the coating layer is 0.48 mm. When the thickness of the coating layer exceeds 0.48 mm, the light transmittance does not change even when a voltage is applied to the electrochromic layer. The preferable lower limit of the thickness of the coating layer is 0.05 mm, and the preferable upper limit is 0.4 mm.

The coating layer is embossed on the surface opposite to the electrolyte layer side.
The roughness of the emboss is not particularly limited, but the preferable lower limit of the ten-point average roughness defined by JIS B 0601 is 20 μm, and the preferable upper limit is 50 μm.

The method for forming the coating layer is not particularly limited. For example, after preparing a solution in which the supporting electrolyte salt is dissolved in the solvent, and mixing the obtained solution with the thermoplastic resin, the mixture is subjected to hot pressing or the like. And a method of forming the coating layer by extruding the mixture with an extruder. For example, in the former method, when a release sheet having an embossed surface is used during hot pressing, the embossed surface of the release sheet is transferred to obtain an embossed coated layer. .

A laminated glass in which 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 so as to be in contact with each conductive film is also one aspect of the present invention.
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.

The glass plate has a conductive film formed on at least one surface. In the laminated glass of the present invention, the interlayer film for laminated glass of the present invention is sandwiched between two glass plates so as to be in contact with the surface of the glass plate on which the conductive film is formed.
The conductive film is preferably a transparent conductive film containing tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), or the like.

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

According to the present invention, there is provided an interlayer film for laminated glass that changes light transmittance by applying a voltage and has excellent handleability, and a laminated glass using the interlayer film for laminated glass. Can do.

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 was prepared by dissolving 13.4 parts by weight of bis (trifluoromethanesulfonyl) imide lithium (LiTFSI) in 47 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO). . 100 parts by weight of the total amount of the obtained electrolyte solution and 100 parts by weight of polyvinyl butyral resin (acetyl group content 13 mol%, hydroxyl group content 22 mol%) obtained by acetalizing polyvinyl alcohol having an average polymerization degree of 2300 with n-butyraldehyde Were mixed to obtain a resin composition. The obtained resin composition was sandwiched between polytetrafluoroethylene (PTFE) sheets, pressed with a hot press through a spacer having a thickness of 400 μm at 150 ° C. and 100 kg / cm ² for 5 minutes, and a thickness of 0.4 mm. The electrolyte layer was obtained.

(2) Preparation of electrochromic layer A solution was prepared by dissolving 0.783 parts by weight of poly (9-ethynyl-10-n-octadecylphenanthrene) in 1.305 parts by weight of toluene. This solution was applied on the obtained electrolyte layer using a bar coater so that the thickness after solvent drying was 0.3 μm, and dried to form an electrochromic layer.

(3) Preparation of coating layer An electrolyte solution was prepared by dissolving 13.4 parts by weight of bis (trifluoromethanesulfonyl) imidolithium (LiTFSI) in 27 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO). . 100 parts by weight of the total amount of the obtained electrolyte solution and 100 parts by weight of polyvinyl butyral resin (acetyl group content 13 mol%, hydroxyl group content 22 mol%) obtained by acetalizing polyvinyl alcohol having an average polymerization degree of 2300 with n-butyraldehyde Were mixed to obtain a resin composition.
Random embossed polytetrafluoroethylene (PTFE) sheet having a 10-point average roughness of 30 μm as defined in JIS B 0601 and polytetrafluoroethylene (PTFE) sheet on which no embossing is formed are obtained. Then, the coating layer was pressed by a hot press under conditions of 150 ° C. and 100 kg / cm ² for 5 minutes through a spacer having a thickness of 100 μm to obtain a coating layer having a thickness of 0.1 mm subjected to embossing treatment.

(4) Manufacture of laminated glass The obtained electrolyte layer on which the electrochromic layer was formed and the coating layer were cut into a size of 5 cm in length and 5 cm in width. An interlayer film for laminated glass was obtained by laminating a coating layer on the surface opposite to the electrochromic layer side of the electrolyte layer on which the electrochromic layer was formed so that the embossed surface was the front side. The obtained interlayer film for laminated glass was sandwiched and bonded between a pair of ITO glasses so as to be in contact with each transparent conductive film to obtain a laminate. The obtained laminate was pressure bonded with a 90 ° C. vacuum laminator to obtain a laminated glass.

(Examples 2-8, Comparative Examples 1-6)
The interlayer film for laminated glass and the laminated film were the same as in Example 1 except that the solvent content contained in the electrolyte layer and the coating layer, the thickness of the coating layer, and the presence or absence of the embossing treatment were described in Tables 1 and 2. Glass was obtained.

(Evaluation)
The following evaluation was performed about the intermediate film for laminated glasses and the laminated glass which were manufactured in the Example and the comparative example. The results are shown in Tables 1 and 2.

(1) Evaluation of handling property of interlayer film for laminated glass In the process of producing a laminate by sandwiching the obtained interlayer film for laminated glass in ITO glass, it was once bonded and then peeled and bonded again. . At this time, the case where peeling and re-bonding could be performed without breaking the shape at all was evaluated as “◯”, and the case where wrinkles were generated in the interlayer film for laminated glass at the time of peeling or re-bonding was evaluated as “×”. did.

(2) Evaluation of electrochromic property of laminated glass After applying a + 2V DC voltage with the electrochromic layer side ITO of the obtained laminated glass as a positive electrode and a counter electrode side ITO as a negative electrode, a -2V DC voltage was applied. . The case where the change in transmittance of the laminated glass was observed by visual observation was evaluated as “◯”, and the case where the change in transmittance was not observed was evaluated as “x”.

According to the present invention, there is provided an interlayer film for laminated glass that changes light transmittance by applying a voltage and has excellent handleability, and a laminated glass using the interlayer film for laminated glass. Can do.

Claims (4)

An electrochromic layer containing an electrochromic compound, an electrolyte layer formed on at least one surface of the electrochromic layer, and a coating layer formed on a surface of the electrolyte layer opposite to the electrochromic layer side An interlayer film for glass,
The electrolyte layer contains a thermoplastic resin, a supporting electrolyte salt and a solvent, and the content of the solvent with respect to 100 parts by weight of the thermoplastic resin is 47 to 160 parts by weight,
The coating layer contains a thermoplastic resin, a supporting electrolyte salt and a solvent, and the content of the solvent with respect to 100 parts by weight of the thermoplastic resin is 45 parts by weight or less,
The interlayer film for laminated glass, wherein the coating layer has a thickness of 0.48 mm or less, and an embossing process is performed on a surface opposite to the electrolyte layer side. The thermoplastic resin contained in the electrolyte layer is a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 4 or 5 carbon atoms and having an acetyl group content of 15 mol% or less and a hydroxyl group content of 30 mol% or less. The interlayer film for laminated glass according to claim 1, wherein the interlayer film is provided. The thermoplastic resin contained in the coating layer is a polyvinyl acetal resin having an acetyl group content of 15 mol% or less and a hydroxyl group content of 30 mol% or less obtained by acetalizing polyvinyl alcohol with an aldehyde having 4 or 5 carbon atoms. The interlayer film for laminated glass according to claim 1, wherein the interlayer film is provided. A laminated glass, wherein the interlayer film for laminated glass according to claim 1, 2 or 3 is sandwiched between a pair of glass plates on which a conductive film is formed so as to be in contact with each conductive film.