JP2002268096A - Highly reliable electrochromic dimming device - Google Patents

Abstract

(57) [Problem] To provide an electrochromic dimming device in which siloxane oligomer contained in a silicone-based sealing material is suppressed from entering the inside of the device. In a light control element sealed with a primary seal material and a secondary seal material, a curable silicone-based sealing material constituting a secondary seal has a low molecular weight siloxane oligomer content of 0.5% by mass or less. Contains a siloxane-based material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EC dimmer using an electrochromic (EC) phenomenon, and is used for the purpose of reducing glare and heat in automobiles, vehicles, ships, aircraft, buildings, and the like. It is also applied to openings where energy saving is required or privacy is required. More specifically, an EC dimming element having high reliability for the EC function of the dimming element is prevented by preventing the siloxane oligomer component contained in the silicone-based sealing material used for sealing between the substrates of the element from entering the inside of the element. About.

[0002]

2. Description of the Related Art A liquid or wet gel-like functional material is laminated between two transparent plates, and a peripheral portion thereof is provided with a two-stage seal (a first seal and a second seal). A functional material laminate having a configuration in which a functional material is sealed with a seal is disclosed in, for example, JP-A-2000-17956. In Japanese Patent Application Laid-Open No. 2000-17956, a first seal is made of a thermoplastic sealing material selected from polyisobutylene, butyl rubber, and isoprene, thereby preventing components such as moisture from evaporating from the inside of the element and gas such as air from the outside. There has been proposed a functional material laminate that realizes suppression of infiltration of the base material and can firmly bond the bases to each other by using a silicone-based sealing material as the second seal.

[0003]

A silicone-based sealing material having excellent adhesion to a substrate such as glass can be easily obtained, and has excellent weather resistance and excellent sealing properties. Approximately 1 to 5% in percentage (hereinafter,
Mass%) of the siloxane oligomer, which has low viscosity and low surface tension, and therefore has a very high permeability and a high compatibility with the polyisobutylene and butyl rubber-based materials constituting the first seal. Therefore, there is a high possibility that the liquid crystal will enter the inside of the element and have various adverse effects on the element. In particular, the EC element is extremely susceptible to the invasion of such a substance, and when a normal silicone-based sealing material is used, the oligomer penetrates into the element to form ITO (In ₂ O ₃ —SnO ₂ ) as an electrode. Film or EC
A functional disorder of the film is generated by, for example, adsorbing or penetrating into the surface of the WO ₃ film or the like as a layer to lower the conductivity. Such a malfunction of the film causes uneven coloring of the element and the like,
It significantly deteriorates the appearance of the device. However, Japanese Patent Application Laid-Open
In JP-A-17956, there is no mention of the possibility of the oligomer component penetrating into the inside of the device and the resulting decrease in the EC function of the device, and no measures against the above-mentioned problems are considered. . Accordingly, an object of the present invention is to prevent the siloxane oligomer component contained in the silicone-based sealing material from entering the inside of the device,
An object of the present invention is to provide a highly reliable EC dimming element for the C function.

[0004]

In order to achieve the above object, the EC dimming device of the present invention is characterized by being sealed with a primary seal and a secondary seal material, and in particular, using a specific material for the secondary seal. is there.

[0005] Among the two sealing materials used in the present invention, the primary seal located inside the peripheral portion of the substrate and provided in direct contact with the electrolyte material is at least one selected from polyisobutylene and butyl rubber. Is used as a thermoplastic sealing material. A sealing material composed of these components has extremely low permeability to gases such as moisture and air, and has excellent resistance to relatively polar materials such as electrolyte materials. Therefore, the electrolyte material is excellent in sealing property, and the penetration of moisture or air from the outside can be strongly suppressed. Further, the material is relatively excellent in durability such as weather resistance and heat resistance. In addition, it is particularly preferable to add an appropriate organic or inorganic filler to the primary seal of the present invention, in addition to the above components, in order to improve various properties such as physical properties, moldability, and workability. As the organic filler added for such a purpose, partially vulcanized butyl rubber, polyethylene powder, ethylene propylene rubber or the like can be used, and as the inorganic filler, calcium carbonate, talc, silica, mica or the like can be used.

[0006] A secondary seal of a curable silicone-based sealing material is provided outside the primary seal. The secondary seal made of silicone-based sealing material with good adhesion to the substrate compensates for the weakness of the primary seal, which has poor adhesion to the substrate,
Prevents separation between the sealing materials, particularly between the substrate and the sealing material due to stress such as thermal expansion at high temperatures. In the present invention, the silicone-based sealing material used for the secondary seal is characterized in that the content of the low-molecular-weight siloxane oligomer contained in the polysiloxane-based material, which is a main component thereof, is 0.5% by mass or less. I do. Here, the low molecular weight siloxane oligomer is a siloxane oligomer having 10 or less silicon atoms. The amount of the low-molecular-weight siloxane oligomer having 10 or less silicon atoms is determined by GC (gas chromatography), IR (infrared spectroscopy), NM
R (nuclear magnetic resonance analyzer), MS (mass spectrometer), GC-
It is separated, qualitatively and quantitatively analyzed by MS (gas chromatograph mass spectrometer) or the like. It is particularly preferred that the content of the low molecular weight siloxane oligomer is 0.1% by mass or less. The EC dimming element of the present invention has low adhesion to the substrate and adhesion between the primary seal and the substrate in a situation where the adhesion of the thermoplastic primary seal to the substrate is reduced, particularly in a high temperature condition. Even if the adhesiveness is reduced, the presence of a secondary seal that has high adhesiveness to the substrate and does not decrease its adhesiveness under high-temperature conditions suppresses intrusion of air, moisture and other gases, and swelling due to solvents. In addition, since the content of the low-molecular-weight siloxane oligomer having a low surface tension is as low as 0.5% by mass or less, penetration of the siloxane oligomer into the inside of the device, which is a problem when a normal silicone-based sealing material is used, may be prevented. is _{suppressed, ITO (in 2 O 3 -SnO} 2) oligomers to the surface of the WO ₃ film, a film or the like or an EC layer is adsorbed or intrusion, such as by reducing the conductivity, cause membrane dysfunction Occurrence of coloring unevenness problem causing elements is prevented.

The curable silicone sealing material constituting the secondary seal of the present invention is, for example, a molecular structure such as a copolymer of linear low-viscosity dimethylsiloxane having silanol groups at both ends and polyfunctional silane. A material containing a polysiloxane-based polymer containing a curable functional group as a main component and adding or mixing an organic or inorganic filler therein is usually used. As the curable functional group-containing polysiloxane-based polymer, those having various functional groups can be used, and a particularly preferable one is one containing a moisture-curable silyl group.
When a general thermosetting silicone is used, the stress generated by the heat applied during curing lowers the degree of adhesion of the primary seal portion, and the primary seal may peel off. However, when a moisture-curable silicone-based sealing material containing a moisture-curable silyl group-containing polysiloxane-based polymer as a main component is used, the curing of the thermosetting silicone that may occur due to the use of the thermosetting silicone. At this time, the primary seal can be prevented from peeling off, and there is no thermal denaturation of the electrolyte component which may be generated by applying heat. Such a moisture-curable silicone-based sealing material can be either a one-component or two-component sealing material, and can be appropriately selected according to the element configuration, manufacturing process, and the like. However, a two-component system in which a curing agent mainly composed of a curing catalyst is blended at an appropriate ratio with respect to a main agent blended with various fillers is particularly advantageous from the viewpoint of rapid curing. In the case of a two-component system, it is possible to mix moisture in the curing agent of the sealing material in advance, so that the sealing property is high and moisture in the air is hardly penetrated. The sealing material can be cured at a practically industrial speed even in difficult conditions. As the curing catalyst, a known curing agent for the moisture-curable silyl group-containing polymer can be used, and an acid, an alkali or an organometallic compound can be used. An organic tin compound is particularly preferable. As a filler added to the secondary seal, calcium carbonate, talc, silica, mica and the like are used. In addition, in addition to the above-mentioned components, plasticizers such as phthalic acid ester compounds and alkylated aromatic compounds, deterioration inhibitors, etc., which can be used for the production of conventional seal materials, are added to the secondary seal material. An agent may be added.

[0008] The elastic modulus of the cured silicone-based sealing material is not particularly limited, but if the deformation of the secondary seal portion due to thermal expansion or the like is too large, the stability and durability of the element are adversely affected. Because of the danger,
The 50% tensile stress specified in JIS A5758 is 35
It is preferably at least N / cm ² , particularly preferably at least 50 N / cm ² .

[0009] It is particularly preferable to pretreat the substrate with a primer of a type corresponding to the characteristics of the substrate at the contact portion between the curable silicone sealing material and the substrate. By the primer treatment, the adhesive force between the substrate and the sealing material becomes stronger, and the reliability and durability can be further improved.

It is preferable that at least a part of the electrolyte material, the primary seal, or the secondary seal is provided with a spacer for defining a distance between the substrates. By providing the spacer, even when an external force is applied to the element, the spacing between the substrates is maintained by the presence of the spacer, and the appearance and reliability of the element can be maintained and improved. The shape and material of the spacer are not particularly limited. For example, the shape may be spherical or rod-like, and spherical glass beads are most preferable from the viewpoint of the appearance and durability of the element. The glass beads are preferably transparent, but may be solid cut,
It may be hollow. The diameter of the glass beads used for the spacer is preferably 100 to 700 μm, and particularly preferably 300 to 400 μm. If the diameter of the glass beads is less than 100 μm, a sufficient EC function cannot be exhibited, and the coloring action may be inferior. On the other hand, if the diameter is more than 700 μm, the response speed may be too slow to be practically used as an EC element. The location of the spacer can be variously selected depending on the type, configuration, and the like of the element, but it is particularly preferable to install the spacer in the vicinity of the peripheral edge of the element for external reasons. The movement of the spacer can be suppressed by various methods. For example, it can be fixed to a substrate with a fixing material or fixed by mixing with a primary seal or a secondary seal.

In the EC light control device of the present invention, various known methods can be used for enclosing the electrolyte material between the substrates. For example, a primary seal is first applied inside one substrate, then a secondary seal is applied outside, and then the other substrate is crimped while deforming the sealing material by pressing to create an empty cell. I do. This method of filling the cell with an electrolyte material while keeping the empty cell in a vacuum state is a very effective encapsulation method. On the other hand, in the case of a high-viscosity electrolyte material such as a highly viscous liquid or a gel, a method such as direct application to a substrate is more preferable.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a highly reliable EC dimming device of the present invention will be described with reference to the drawings, but the structure of the present invention is not limited to these.

FIG. 1 is a sectional view of a basic structure showing an example of an EC device of the present invention. In FIG. 1, substrates 11 and 1
Electrodes 16 and 17 are provided inside 2 respectively.
The electrolyte layer 13 and the EC layer 18 are laminated to form the electrode 16
And 17. A primary seal 14 is provided on the inside of the substrate at the periphery of the element so as to be in contact with the electrolyte layer 13 and the EC layer 18, and a secondary seal 15 is provided outside the primary seal 14. Although not shown, a power supply is arranged between the electrodes 16 and 17, and a necessary voltage is applied.

At least one of the substrates 11 and 12 is transparent. Such a substrate, the material, thickness, dimensions, shape, etc., can be appropriately selected according to the purpose, specifically, for example, polyester, polysulfone,
Plastics such as polycarbonate, and glass are exemplified.

When used for ordinary openings, such as for construction or automobiles, it is particularly preferred that both substrates are transparent. In this case, a translucent material such as ground glass or a white plastic film may be used. on the other hand,
If the application is a mirror, only one of the substrates is transparent. In this case, one of the substrates, which is not transparent,
Metals, ceramics, plastic films coated with metals, and the like can also be used. Such an opaque substrate may be a conductive substrate also serving as an electrode. Specific examples of the material of the conductive substrate include an aluminum film, a stainless steel film, a copper film, and a silver film.

The electrodes 16 and 17 may be either non-transparent or transparent, but are preferably transparent. Specifically, ITO (In ₂ O ₃ -SnO ₂ ), SnO ₂ , ZnO
_{And the} like. These can be formed on a substrate by a known method such as a vacuum evaporation method, an electron beam vacuum evaporation method, and a sputtering method. When the application is a mirror substrate, a reflective film made of aluminum, stainless steel, copper or silver can be used.

The material of the EC layer 13 is V ₂ O ₅ , Nb ₂ O
₅ , reduction coloring materials such as TiO ₂ and WO ₃ , NiO,
Oxidation coloring materials such as Cr ₂ O ₃ , MnO ₂ , and CoO are suitable, and these can be formed by a known method such as a vacuum evaporation method, an electron beam vacuum evaporation method, and a sputtering method. The film thickness is not particularly limited, but is usually in the range of about 10 to 2000 nm, and particularly preferably about 20 to 1000 nm. In such a range, a sufficient coloring effect can be obtained, and there is no problem that the response speed is delayed.

As the electrolyte layer, a composition in which a supporting electrolyte is mixed and dissolved in a polar solvent is usually used. If necessary, a solvent-soluble high-molecular-weight polymer may be added to increase the viscosity of the electrolyte layer to form a gel, and
For the purpose of mixing the polymerizable compound and then curing the mixture to form a network to form a solid electrolyte, a mixture in which other additives are coexistent is also preferably used.

FIG. 2 is a sectional view showing another embodiment of the high-performance EC dimming device of the present invention. In the embodiment of FIG. 2, similarly to the embodiment of FIG. 1, the electrodes 26 and 27 are provided inside the substrates 21 and 22, respectively, but the ECs existing as two different layers between the electrodes 26 and 27 are provided. Instead of the layer 18 and the electrolyte layer 13, an organic EC agent which is a composition mixed with a polar solvent, a supporting electrolyte, and the like is present as a mixed layer 23. A mixed layer 23 is provided inside the substrate at the periphery of the device.
The primary seal 24 is provided in contact with the
This is similar to the embodiment of FIG. 1 in that the secondary seal 25 is provided. In the case of the embodiment shown in FIG. 2, since the organic EC agent develops a color by an oxidation-reduction reaction, the above-mentioned EC such as WO ₃
No layers are required. Examples of the organic EC agent include a redox system composed of a combination of a compound having a viologen structure and a compound having a phenylamine structure.

As the polar solvent used for the electrolyte, an organic non-aqueous solution is used. Specific examples include propylene carbonate, ethylene carbonate, sulfolane, γ-butyrolactone, dimethyl sulfoxide, dimethylformamide and the like, and mixtures thereof.

The supporting electrolyte is not particularly restricted but includes, for example, alkali metal salts and quaternary ammonium salts. Examples of the alkali metal salt include lithium perchlorate, sodium perchlorate, potassium perchlorate, lithium tetrafluoroborate, sodium tetrafluoroborate, potassium tetrafluoroborate, lithium hexafluorophosphate, and sodium hexafluorophosphate. , Potassium hexafluorophosphate, lithium trifluoroacetate, lithium trifluoromethanesulfonate, and the like. Examples of the quaternary ammonium salts include tetraethylammonium perchlorate, tetraisopropylammonium perchlorate, and tetra-n-butyl perchlorate. Quaternary ammonium salts of perchloric acid such as ammonium, or quaternary ammonium salts of tetrafluoroboric acid such as tetraethylammonium tetrafluoroborate and tetra-n-butylammonium tetrafluoroborate; Quaternary ammonium salts of hexafluorophosphoric acid such as tetraethylammonium safluorophosphate and tetra-n-butylammonium hexafluorophosphate, and quaternary ammonium salts of trifluoromethanesulfonic acid such as tetra-n-butylammonium trifluoromethanesulfonate Is mentioned.

When a redox material is added and itself functions as a supporting electrolyte, it is not necessary to separately add a supporting electrolyte. The redox material is preferably a material that can be stably redox-reduced in the electrolyte.In addition to a redox material composed of a combination of a compound having a porogen structure and a compound having a phenylamine structure, for example, ferrocene, lithium iodide, chloride Copper etc. are mentioned.

The content of the alkali metal salt, quaternary ammonium salt or redox material which is the supporting electrolyte in the electrolyte layer or the mixed layer is not particularly limited, but is usually 0.5 to 30% by mass in the whole electrolyte composition. , Especially 1-2
0% by mass is preferred.

The primary seal provided on the peripheral portion of the substrate in contact with the electrolyte layer and the EC layer or the mixed layer of the EC material and the electrolyte includes a thermoplastic sealing material made of at least one selected from polyisobutylene and butyl rubber. Is used. When both are used at the same time, a blend is obtained. The primary seal of the present invention is preferably a blend of both. In the case of a blend, the blend ratio of the two is generally 80/20 to 30/70 by weight of polyisobutylene / butyl rubber or partially vulcanized butyl rubber, but can vary depending on the usage, required performance, and the like. However, the present invention is not limited to the above range. Such a primary seal can be deposited on a substrate under heating using existing extrusion or coating equipment. It is also possible to apply a tape-shaped or string-shaped material directly onto the substrate while deforming it.

The secondary seal provided outside the primary seal contains 0.5% by mass or less, preferably 0.1% by mass, of a low molecular weight siloxane oligomer having 10 or less silicon atoms in a polysiloxane-based material which is a main component thereof. Curable silicone-based sealing material of not more than mass% is used. Such a polysiloxane-based material can be obtained by evaporating an oligomer component under a high-temperature vacuum, but a commercially available product is also usable, and specific examples include SE9186L (manufactured by Dow Corning Toray). . In addition, the moisture curing type 2
Component-based sealing materials are particularly preferred from the viewpoint of quick-curing properties. Further, a primer treatment may be performed to further enhance the adhesiveness to the substrate, and a spacer made of spherical glass beads may be used to regulate the substrate interval in the device.

In order to improve the weather resistance of the electrolyte layer or the sealing material, it is more preferable to form an ultraviolet absorbing layer on the outer or inner surface of the element substrate. When the substrate is made of a resin material, a configuration in which an ultraviolet absorber is kneaded and integrated is also possible. Known UV absorbers such as benzotriazole-based compounds and benzophenone-based compounds can be used as the ultraviolet absorber used in the present invention.

[0027]

The present invention will be described below with reference to Examples 1 to 6 and Comparative Examples 1 to 4.
However, the present invention is not limited to these.

(1) Preparation of Electrode Substrate On a 3 mm thick glass substrate with ITO of 10 cm × 10 cm, WO ₃ is vapor-deposited at a rate of 2 nm / sec to a thickness of 500 nm under high vacuum conditions to provide an EC layer. An electrode substrate (hereinafter referred to as an EC substrate) was manufactured. On the other hand, the same ITO substrate except that the EC layer was not provided was used as a counter substrate.

(2) Fabrication of an EC device (device configuration in FIG. 1) A primary seal material is formed on an EC substrate, and a secondary seal material obtained by mixing spherical glass beads having an outer diameter of 400 μm as a spacer on the outside thereof is sealed. Then, after the opposing substrate is pressure-bonded, γ-butyrolactone / lithium iodide (6 ml /
A 0.1 g mixture) -based electrolyte material was vacuum injected, and the injection port was sealed with butyl rubber. Subsequently, a lead wire was connected to each of the electrodes of the EC substrate and the counter substrate to produce an EC device, and the performance of the obtained EC device was evaluated. The components of the primary seal used here are as follows. Primary seal: polyisobutylene / butyl rubber = 60/4
0 (mass ratio) Filler: added 30% by mass of calcium carbonate

The basic characteristics of the secondary sealing material used are as follows. Table 1 低 Low molecular weight 50% secondary seal with 10 or less silicon atoms Composition Siloxane tensile Tensile stress Example of main material / hardener Gomer content (%) (N / cm ² ) ──────────────────────────例 Example 1,6 A Two-part curing silicone 0.02 97.2 12/1 Example 2,7 B Two-part curing silicone 0.10 105.6 12/1 Example 3,8 C One-part curing silicone system 0.05 87.0-Example 4,9 D Two-part curing silicone system 1.50 79.8 12/1 Example 5,10 E Two-part curing silicone system 2. 13 76.2 12/1 に お い て In Table 1 above, the curing agent Constituents are tin-based curing catalyst and calcium carbonate Arm, plasticizers and other additives.
The content of the low-molecular-weight siloxane oligomer having 10 or less silicon atoms was measured by GC-MS.

(3) Change in transmittance (decolored state → colored state) The EC substrate side becomes a negative electrode and the opposite substrate side becomes a positive electrode.
The visible light transmittance was measured after applying a voltage of 1.5 V for 10 seconds (colored state). Thereafter, the visible light transmittance was measured after applying a voltage of 1 V for 30 seconds (decolored state) so that the EC substrate side became a positive electrode and the opposite substrate side became a negative electrode. The results are shown in the order of “colored state → decolored state” in the column of transmittance in Table 2.

(4) Heat resistance test An EC element was left in a thermostat at 90 ° C. for 300 hours to conduct a heat test. As shown in Table 2, the devices of Examples 1 to 3, which are examples of the present invention using a curable silicone-based sealing material having a low oligomer content as a secondary seal,
All showed extremely good heat resistance. On the other hand, in Examples 4 and 5, which are comparative examples in which a silicone-based sealing material having a high oligomer content was used as the secondary seal, clouding occurred inside the element around the seal. It is considered to be an internal defect due to penetration of the silicone oligomer.

(5) Heat Resistance Driving Test A test for repeating the coloring and decoloring states in a thermostat at 60 ° C. was repeated 70,000 times. As shown in Table 2, in Examples 1 to 3, no change in appearance such as uneven coloring, foaming, and yellowing was observed. On the other hand, in Examples 4 and 5 in which a silicone-based sealing material having a high oligomer content was used as the secondary seal,
There has been a problem that the WO ₃ film that normally emits blue color is not colored. This is probably due to the deterioration of the WO ₃ film due to the penetration of the silicone-based oligomer into the electrolyte.

[0034]

(6) Fabrication of EC device (device configuration of FIG. 2) A primary sealing material is mixed on a glass substrate of 10 cm × 10 cm with ITO having a thickness of 3 mm, and spherical glass beads having an outer diameter of 400 μm as a spacer on the outside thereof. After sealing with the secondary sealing material and then pressing another ITO substrate, propylene carbonate / diphenylpropyl-bipiperidium tetrafluoroborate / dimethylphenazine = 10 ml / 0.2 g / 0.1 g The mixture was injected under vacuum and the inlet was sealed with butyl rubber. Then both IT
A lead wire was connected to each of the electrodes of the O-substrate to produce an EC device.

(7) Performance Evaluation of EC Device The performance of an EC device having the structure shown in FIG. 2 using an organic redox agent as an EC agent was evaluated in the same manner as in Examples 1 to 5 except for the structure of the device. Table 3 shows the results.

Table 3: Performance evaluation with the device configuration of FIG.

As is clear from Tables 2 and 3, when a curable silicone-based sealing material having a low oligomer content is used as the secondary seal, the heat-resistant durability is extremely excellent.

[0039]

According to the present invention, there is provided an EC light control device in which an electrolyte layer provided between substrates is sealed with a primary seal and a secondary seal material. By using a polysiloxane-based material containing 0.5% by mass or less of a low-molecular-weight siloxane oligomer having 10 atoms or less, a highly reliable EC device having excellent durability can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an EC device having a configuration in which an EC layer and an electrolyte layer of the present invention are separated.

FIG. 2 is a cross-sectional view of an EC device according to the present invention, in which an EC layer and an electrolyte layer are not separated.

[Explanation of symbols]

 11: Substrate 12: Substrate 13: Electrolyte layer 14: Primary seal 15: Secondary seal 16: Electrode 17: Electrode 18: EC layer 21: Substrate 22: Substrate 23: Mixed layer of EC material and electrolyte 24: Primary seal 25: Secondary seal 26: Electrode 27: Electrode

Continued on the front page (72) Inventor Shibata Adult 1150 Hazawa-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside Asahi Glass Co., Ltd. (72) Inventor Tomohiro Toya 1178 Shimbashi-cho, Izumi-ku, Yokohama-shi, Kanagawa Prefecture 4-5-403 Minamisuna, Koto-ku F-term (reference) 2K001 AA08 BB19 BB28 BB29 CA08 CA19 CA20 CA30 CA45 4H017 AA03 AB07 AB15 AD01 AE04 AE05

Claims (2)

[Claims] 1. An electrochromic dimming device having a structure in which a liquid or gel electrolyte material layer is sandwiched between two substrates, at least a part of which is transparent, on one or both substrates. A seal consisting of a primary seal provided in contact with the electrolyte material and a secondary seal provided outside the primary seal is provided inside the peripheral portion of the substrate for sealing the electrolyte material inside the peripheral portion of the substrate. Wherein the primary seal is a thermoplastic sealing material containing at least one selected from polyisobutylene and butyl rubber, and the secondary seal has a content of low molecular weight siloxane oligomer having 10 or less silicon atoms in terms of mass percentage. 0.5
A light modulating element which is a curable silicone-based sealing material containing not more than 5% of a polysiloxane-based material. 2. The method according to claim 1, wherein said curable silicone sealing material is 2
The electrochromic light control device according to claim 1, which is a component system.