JPS6356590A - Medium for electrochromic dimmer - Google Patents

Abstract

PURPOSE:To provide the titled novel medium containing a specific 1,3-dioxane-2- one, capable of dissolving electrolytes and additives for improving various functions to form a clear solution. having high chemical stability and keeping high weather-resistance over a long period. CONSTITUTION:The objective medium contains (A) a compound of formula I (R1 is H or methyl; R2 is alkyl which may have 1-4C side chain; X is C or S) or (B) a compound of formula II {Y is group of formula III or IV [R3 and R4 are alkyl which may have 1-4C (un)saturated side chain or together form a 5-6-membered ring which may contain O atom]}. An electrochromic dimmer prepared therefrom has high response of coloring and color distinction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel electrochromic phosphor (hereinafter referred to as E
The present invention relates to a medium for use in CR optical bodies.

BACKGROUND OF THE INVENTION EC light control bodies have recently attracted attention as light control bodies that can replace conventional blinds and curtains. The BCQ light body is a laminate consisting of a transparent substrate on which an EC material layer is formed on a transparent electrode, and a transparent substrate on which a counter electrode is formed, with an electrolyte interposed therebetween.

EC dimmers are expected to be used as dimmers for window glass in buildings, vehicles, aircraft, etc. because they can arbitrarily control the amount of incident outside light such as sunlight by electro-optical action.

The EC2 optical medium contains electrolytes (e.g., lithium perchlorate, lithium chloride, lithium fluoroborate, sodium perchlorate, etc.) and various function-enhancing additives (e.g.,
Various chelating agents added to improve responsiveness,
It is essential to have the property of transparently dissolving iodine-containing compounds added to improve color erasing properties, and trichloroacetic acid and benzenesulfonic acid added to improve responsiveness during coloring.

However, the media conventionally proposed as media for ECM light bodies, ie, polyvinyl alcohol, polyacrylamide, ethylene glycol, borisdylene, butyl alcohol, etc., do not satisfactorily meet these requirements.

Problems to be Solved by the Invention The present invention is a novel material that is not only chemically stable and has long-term weather resistance, but also has the property of transparently dissolving electrolytes and various function-enhancing additives. This project was made to provide a medium for EC light control bodies.

That is, the present invention relates to the general formula [I]: (where RI represents a hydrogen atom or a methyl group, R2 represents an alkyl group which may have a side chain having 1 to 4 carbon atoms, and X represents (representing a carbon atom or a sulfur atom) or a compound represented by the general formula [■];
[I]T] (wherein R2 has the same meaning as above) or a group represented by the general formula [■]: -N [rv] (wherein R3 and R4 each independently represent the number of carbon atoms Indicates the activity shown by an alkyl group that may have 1 to 1 saturated or unsaturated side chain, or a 5-membered ring (which may have an oxygen atom together, or a 6-membered ring) The present invention relates to an electrochromic light control medium containing a compound represented by the following.

In the above general formula [+] or [II], R1 represents a hydrogen atom or a methyl group, and R3 has 1 to 4 carbon atoms.
An alkyl group which may have a side chain, such as methyl (, ethyl, isopropyl or isobutyl), X represents a carbon atom or a sulfur atom, Y represents the general formula [
■] or [lV].

In general formula [11J], R2 has the same meaning as above and represents an alkyl group which may have a side chain having 1 to 4 carbon atoms.

In the general formula [IV], R3 and R4 are each independently an alkyl group having 1 to 4 carbon atoms which may have a saturated or unsaturated side chain, such as a methyl group, an ethyl group, an isopropyl group, or Indicates isobutyl method, etc., or both together indicate a 5-membered ring or a 6-membered ring that may have an oxygen atom.

Specific examples of compounds represented by such general formulas [1] to [IV] are shown in Tables 1 to 3 below.

Compounds represented by the general formulas [L to [■] generally have a low freezing point, so they do not condense even when used outside, especially in cold regions or in winter, as window glasses, windshields, etc.

In addition, in the case of a compound having a relatively high freezing point, a solvent having a low freezing point such as Buknol, Isopropanol, propylene carbonate, etc. can be appropriately blended and used.

Furthermore, since the compounds represented by the general formulas [11 to [IV] generally have a high dielectric constant, the responsiveness when used as a medium for an EC light control device is extremely high.

Furthermore, the compounds represented by the general formulas 11] to [V] can transparently dissolve the electrolytes and various additives for EfJ and 'll light bodies to a concentration sufficient for practical use.

The EC light control medium according to the present invention may be used, for example, in a configuration as shown in the schematic cross-sectional view of FIG. That is, 2
A transparent silver electrode (2) is provided on the inner surface of one of the transparent substrates (1), an EC layer (3) is formed on the transparent electrode, and a counter electrode (4) is formed on the inner surface of the other transparent substrate. Let this 2
The two transparent substrates are assembled and their peripheral edges are sealed with a sealing material (6), and the EC light control medium (5) according to the present invention is sealed inside.

The above transparent substrate (1), transparent electrode (2), counter electrode (4)
) and the EC layer (3) may be any one commonly used in conventional EC:A light bodies.

Examples of the transparent substrate include a transparent glass plate, a plastic plate, or a laminate thereof.
] Compounds represented by these compounds have higher solvent properties than conventional media such as alcohols, so the use of plastic plates that swell or become opaque when dissolved in it should be avoided. In addition, a transparent substrate with a thickness sufficient for practical use as a window, partition, etc. is used.

Transparent electrodes include In2O* SnO3, SnO2,
An example is an electrode made of Au or the like which is transparent and is not corroded by the electrolyte. The transparent electrode is deposited on the transparent substrate by vapor deposition, sputtering,
It may be formed by a method such as film adhesion.

The opposing electrode 71X may be made of the same material as the transparent electrode described above, but may also be made of thin wire-shaped metal, carbon, or the like.

As the EC layer, a deposited film of W 2 O 3 , MoO + , T i Ot or IrtO* is suitable, but it is not limited thereto.

Examples of the sealing material include epoxy resin, silicone resin, fluororesin, and acrylic resin.

The medium for EC light control according to the present invention is used by dissolving a suitable supporting electrolyte in the compound represented by the above general formula. As the supporting electrolyte, known electrolytes such as those mentioned above, such as sodium halides such as lithium chloride, lithium fluoride, and titanium iodide, and alkali metal perchlorates such as lithium perchlorate and sodium perchlorate, may be used as appropriate. Bye. The amount used is usually 10-3 mol/Q or more, preferably 0.1 to 1
．． It is 0 mol/Q.

If desired, other additives such as colorants, viscosity modifiers, antifreeze agents, diluents, etc. may be appropriately blended into the EC light control medium according to the present invention.

Hereinafter, the present invention will be explained by examples.

Example 1 A 1n20a 5n02 transparent electrode was vacuum-deposited on the inner surface of a transparent glass substrate, and WO3 was vacuum-deposited on the electrode. Iln=05-5no was vacuum deposited on the inner surface of another transparent glass substrate.

Two transparent substrates were arranged relative to each other so that the electrode surfaces were on the inner surface, and the peripheral edges were sealed with epoxy resin to prepare a transparent cell. A solution of lithium perchlorate dissolved in 5-ethyl-5-ethoxymethyl-1,3-dioxan-2-one (0.3 mol/a) was injected into the transparent cell, and the injection port was opened. It was sealed to obtain an EC light control body.

The obtained ECM light body was irradiated with a weather meter for 300 hours, and the transmittance at the time of decolorization before and after irradiation was compared. The results are shown in Table 4 below.

Further, when a voltage of IV was applied to this ECQ light body, the transmittance decreased to 20% in about 1 minute, and the color was completely erased in about 1 minute.

Example 2 4-(pyrrolidinomethyl)-1 instead of 5-ethyl-5-ethoxymethyl-1,3-dioxan-2-one
, 3-dioxolane-2-one was used, but the transmittance before and after irradiation was compared in the same manner as in Example 1. The results are shown in Table 4.

Further, when a voltage of IV was applied to the obtained ECR light body, the transmittance decreased to 20% in about 1 minute, and decolorization was completed in about 1 minute.

The transmittance before and after irradiation was compared in the same manner as in Example 1, except that n-butanol was used instead of 5-ethyl-5-ethoxymethyl-1,3-dioxan-2-one. The results are shown in Table 4.

Further, when a voltage of 1 .mu. was applied to the obtained ECXII light body, the transmittance decreased to 20% in about 2 minutes, and decolorization was completed in about 2 minutes.

Table 4 Effects of the Invention The EC light control body using the medium according to the present invention not only has a fast response speed of coloring/decoloring, but also has excellent weather resistance, so that the light transmittance does not decrease due to long-term light irradiation. small.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of an EC light control body using the EC light control body medium according to the present invention. (1) is a transparent substrate, (2) is a transparent electrode, (3) is an EC layer, (4)
is a counter electrode, (5) +: iEc YuM light body medium, (6)
indicates sealing material.

Claims (1)

[Claims] 1. General formula [I]: ▲There are mathematical formulas, chemical formulas, tables, etc.▼[I] (In the formula, R_1 represents a hydrogen atom or a methyl group, and R_
2 represents an alkyl group which may have a side chain having 1 to 4 carbon atoms, and X represents a carbon atom or a sulfur atom) Compound or general formula [II]: ▲ Numerical formula, chemical formula, There are tables, etc. ▼ [II] [In the formula, X has the same meaning as above, and Y is the general formula [III]
:-O-R_2[III] (In the formula, R_2 has the same meaning as above) Group or general formula [IV]: ▲There are mathematical formulas, chemical formulas, tables, etc.▼[IV] (In the formula, R_3 and R_4 each independently represent an alkyl group having 1 to 4 carbon atoms that may have a saturated or unsaturated side chain, and both together represent a 5- or 6-membered ring that may have an oxygen atom. A medium for an electrochromic light control body containing a compound represented by the following.