Dimmer, laminated glass, and vehicle

Abstract

The present invention provides a light modulator having high designability. This light modulator is provided with a first resin layer, a light modulation layer, and a second resin layer in this order, wherein the color of the first resin layer is different from the color of the second resin layer.

Description

Technical Field

[0001] The present invention relates to a light control body and also to a laminated glass and a vehicle using the light control body. Background Art

[0002] As described in Patent Document 1, a dimming body having a first resin layer, a dimming layer, and a second resin layer in this order is known. The dimming layer in the dimming body becomes transparent when a voltage is applied, and becomes opaque when no voltage is applied, so that the color of the dimming body changes when a voltage is applied and when no voltage is applied. The dimming body is used, for example, as a laminated glass (dimming glass) sandwiched between a pair of glass plates.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-254079 Summary of the invention

[0006] Technical problem solved by the invention

[0007] In the conventional dimming body, the first resin layer and the second resin layer have the same composition, so when no voltage is applied, the color of the dimming body observed from the first resin layer side is the same as the color of the dimming body observed from the second resin layer side. Therefore, it is difficult to say that the conventional dimming body has high design properties.

[0008] An object of the present invention is to provide a light control element having high design properties. Another object of the present invention is to provide a laminated glass and a vehicle using the light control element.

[0009] Technical means of solving problems

[0010] According to a broad aspect of the present invention, there is provided a light modulator including a first resin layer, a light modulating layer, and a second resin layer in this order, wherein the color of the first resin layer is different from the color of the second resin layer.

[0011] In a specific embodiment of the light modulator of the present invention, the visible light transmission color of the first resin layer and the visible light transmission color of the second resin layer are L * a * b * The color difference in the color system is greater than 0 and less than 100.

[0012] In a specific embodiment of the light modulator of the present invention, the absolute value of the value X obtained by the following formula (X) is 5 or more and 100 or less.

[0013] Value X = AB (X)

[0014] A: The visible light transmission color of the first resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied. * a * b * Color Difference in Color Representation System

[0015] B: The visible light transmission color of the second resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied. * a * b * Color Difference in Color Representation System

[0016] In a specific embodiment of the light modulator of the present invention, the visible light transmission color L of the first resin layer is * a * b * Chroma C in the color system * is 50 or less, and the visible light transmission color L of the second resin layer * a * b * Chroma C in the color system * The visible light transmittance of the second resin layer is less than 100%.

[0017] In a specific embodiment of the light modulator of the present invention, when the visible light spectrum of the first resin layer is obtained at a wavelength of 380 nm to 780 nm, the main wavelength of visible light of the first resin layer exists in a wavelength range of 580 nm to less than 780 nm.

[0018] In a specific embodiment of the light modulator of the present invention, when the visible light spectrum of the second resin layer is obtained at a wavelength of 380 nm to 780 nm, the main wavelength of visible light of the second resin layer exists in a wavelength range of 380 nm to less than 650 nm.

[0019] In a specific embodiment of the dimming body of the present invention, when the visible light spectrum of the first resin layer at a wavelength of 380nm to 780nm and the visible light spectrum of the second resin layer at a wavelength of 380nm to 780nm are obtained respectively, the ratio of the peak height of the main wavelength of visible light of the second resin layer to the peak height of the main wavelength of visible light of the first resin layer is greater than 0 and is less than 5.

[0020] In a specific embodiment of the light-adjusting element of the present invention, the first resin layer contains a thermoplastic resin and a colorant, and the second resin layer contains a thermoplastic resin and a colorant.

[0021] In a specific embodiment of the light control body of the present invention, the average thickness of the first resin layer is 50 μm to 1000 μm, and the average thickness of the second resin layer is 50 μm to 1000 μm.

[0022] In a specific embodiment of the light modulator of the present invention, when no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

[0023] In a specific embodiment of the light modulator of the present invention, when no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

[0024] In a specific embodiment of the light modulator of the present invention, the visible light transmission color L of the light modulator when a voltage is applied is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

[0025] In a specific embodiment of the light-adjusting body of the present invention, the first resin layer and the second resin layer are a combination in a complementary color relationship.

[0026] In a specific embodiment of the light modulator of the present invention, the visible light transmission color L of the first resin layer is * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The product of is negative.

[0027] In a specific embodiment of the light modulator of the present invention, the visible light transmission color L of the first resin layer is * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The sum of is less than 15.

[0028] In a specific embodiment of the light modulator of the present invention, the visible light transmission color L of the first resin layer is * a* b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The product of is negative.

[0029] In a specific embodiment of the light modulator of the present invention, the visible light transmission color L of the first resin layer is * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The sum of is less than 15.

[0030] In a specific embodiment of the light modulator of the present invention, the visible light reflection color L of the first resin layer is * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The product of is negative.

[0031] In a specific embodiment of the light modulator of the present invention, the visible light reflection color L of the first resin layer is * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The sum of is less than 10.

[0032] In a specific embodiment of the light modulator of the present invention, the visible light reflection color L of the first resin layer is * a * b * Color coordinate b in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate b in the color system * The sum of is less than 10.

[0033] According to a broad aspect of the present invention, there is provided a laminated glass including a first laminated glass component, a second laminated glass component, and the light control element, wherein the light control element is disposed between the first laminated glass component and the second laminated glass component.

[0034] In a specific embodiment of the laminated glass of the present invention, when no voltage is applied, the visible light reflection color L of the laminated glass measured from the first laminated glass member side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

[0035] In a specific embodiment of the laminated glass of the present invention, when no voltage is applied, the visible light reflection color L of the laminated glass measured from the second laminated glass member side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

[0036] In a specific embodiment of the laminated glass of the present invention, the visible light transmission color L of the laminated glass when a voltage is applied is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

[0037] According to a broad aspect of the present invention, there is provided a vehicle including a vehicle body and a laminated glass as a window glass of the vehicle, wherein the laminated glass is the laminated glass described above.

[0038] Effects of the Invention

[0039] The light modulator of the present invention comprises a first resin layer, a light modulating layer and a second resin layer in this order, wherein the color of the first resin layer is different from the color of the second resin layer. The light modulator of the present invention has a high design due to the above-mentioned structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] [ Figure 1 ] Figure 1 It is a cross-sectional view schematically showing a light modulator according to one embodiment of the present invention.

[0041] [ Figure 2 ] Figure 2 It is a schematic representation of the use of Figure 1 A cross-sectional view showing an example of a light-adjusting body for laminated glass. DETAILED DESCRIPTION

[0042] Hereinafter, the details of the present invention are described.

[0043] (Dimming body)

[0044] The dimming body of the present invention comprises a first resin layer, a dimming layer and a second resin layer in sequence. In the dimming body of the present invention, the first resin layer, the dimming layer and the second resin layer are sequentially arranged in the thickness direction of the dimming body. In the dimming body of the present invention, the dimming layer is arranged between the first resin layer and the second resin layer. In the dimming body of the present invention, the color of the first resin layer is different from the color of the second resin layer.

[0045] The light control element of the present invention has the above-mentioned structure and therefore has high design properties.

[0046] In addition, in the dimming body of the present invention, by appropriately selecting the first resin layer and the second resin layer to make them a combination in a complementary color relationship, when no voltage is applied, the color observed from the first resin layer side is different from the color observed from the second resin layer side, and when voltage is applied, it is an achromatic color or a color close to an achromatic color.

[0047] When the laminated glass (dimming glass) having the dimming body of the present invention is used, for example, as a window glass of a vehicle, when no voltage is applied, the color of the window glass when viewed from the inside of the vehicle is different from that when viewed from the outside of the vehicle, so the design is high. For example, the color of the window glass when viewed from the inside of the vehicle can be the same color as the interior of the vehicle, or a colorless or nearly achromatic, and on the other hand, the color of the window glass when viewed from the outside of the vehicle can be the same color as the vehicle body, or a color with high privacy protection. In addition, by appropriately selecting the first resin layer and the second resin layer in a complementary color relationship, the color can be achromatic or nearly achromatic when a voltage is applied. Therefore, when a voltage is applied, the visual recognition from the inside and outside of the vehicle can be improved.

[0048] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0049] Figure 1 It is a cross-sectional view schematically showing a light modulator according to one embodiment of the present invention.

[0050] Figure 1The dimming body 11 shown includes a first resin layer 1, a dimming layer 3, and a second resin layer 2 in this order. The first resin layer 1 is arranged and laminated on the first surface 3a of the dimming layer 3. The second resin layer 2 is arranged and laminated on the second surface 3b on the opposite side of the first surface 3a of the dimming layer 3. The first resin layer 1 and the second resin layer 2 are protective layers, respectively, and are surface layers in this embodiment. The dimming layer 3 is arranged between the first resin layer 1 and the second resin layer 2, and is sandwiched therebetween.

[0051] It should be noted that other layers may be disposed between the first resin layer 1 and the light-adjusting layer 3, and between the second resin layer 2 and the light-adjusting layer 3. The first resin layer 1 and the light-adjusting layer 3, and the second resin layer 2 and the light-adjusting layer 3 are preferably directly laminated.

[0052] In the present invention, it is preferred that the visible light transmission color L of the first resin layer, the light-adjusting layer, the second resin layer, and the light-adjusting body be measured. * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C * In the present invention, it is preferred that the visible light reflection color L of the first resin layer, the light-adjusting layer, the second resin layer, and the light-adjusting body be measured. * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C * These color coordinates and chromaticity C * The measurement was performed in the following manner.

[0053] (1) Preparation of measurement sample (laminated glass for measurement):

[0054] Prepare a measurement object (the first resin layer, the dimming layer, the second resin layer or the dimming body). When the measurement object is the first resin layer, the dimming layer or the second resin layer, the first resin layer, the dimming layer and the second resin layer can be peeled off from the dimming body to prepare the first resin layer, the dimming layer and the second resin layer. The prepared measurement object is sandwiched between two transparent glasses with a thickness of 2.5 mm based on JIS R3202:1996 to obtain a laminate. The obtained laminate is placed in a rubber bag, degassed at a vacuum degree of 2.6 kPa for 20 minutes, and then directly moved to an oven after degassed, and further maintained at 90°C for 30 minutes for vacuum pressing to pre-press the laminate. The pre-pressed laminate is pressed for 20 minutes under the conditions of 135°C and a pressure of 1.2 MPa in an autoclave to obtain a measurement sample (laminated glass for measurement).

[0055] (2) Color coordinate a of the visible light transmission color * 、Color coordinate b * 、Color coordinates L * and chroma C * Determination of:

[0056] The visible light transmission color L of the measurement sample (laminated glass for measurement) * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C * The measurement is performed based on JIS Z8781 using CIE standard illuminant D65 and 10° field of view isochromatic functions. Specifically, the measurement is performed in the following manner. The spectral spectrum of the measurement sample (laminated glass for measurement) is measured using a spectrophotometer based on JIS R3212:2021. The color coordinates a of the visible light transmission color of the obtained measurement sample are * 、Color coordinate b * 、Color coordinates L * and chroma C * Color coordinate a as the visible light transmission color of the object to be measured * 、Color coordinate b * 、Color coordinates L * and chroma C * In other words, the color coordinates a of the visible light transmission color of the obtained measurement sample are * 、Color coordinate b * 、Color coordinates L * and chroma C *The color coordinates a of the visible light transmission color of the first resin layer, the light-adjusting layer, the second resin layer or the light-adjusting body as the measurement object are respectively * 、Color coordinate b * 、Color coordinates L * and chroma C * .

[0057] (3) Color coordinate a of the visible light reflection color * 、Color coordinate b * 、Color coordinates L * and chroma C * Determination of:

[0058] The L of the visible light reflection color of the measurement sample (laminated glass for measurement) * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C * The color coordinates a of the visible light reflection color of the obtained sample are measured by using a spectrophotometer based on JIS R3212:2021. * 、Color coordinate b * 、Color coordinates L * and chroma C * Color coordinate a as the visible light reflection color of the object to be measured * 、Color coordinate b * 、Color coordinates L * and chroma C * In other words, the color coordinates a of the visible light reflection color of the obtained measurement sample are * 、Color coordinate b * 、Color coordinates L * and chroma C * The color coordinates a of the visible light reflection colors of the first resin layer, the light-adjusting layer, the second resin layer, or the light-adjusting body as the measurement objects are respectively * 、Color coordinate b * 、Color coordinates L * and chroma C * .

[0059] It should be noted that the color coordinates a of the visible light transmission color and the visible light reflection color of the measured sample are * 、Color coordinate b * 、Color coordinates L * and chroma C *It means the value measured at the center between one end and the other end of each measurement object. The one end and the other end refer to the ends of the measurement object on both sides facing each other. In addition, as the spectrophotometer, for example, "UH-4150" manufactured by HI TACHI HIGH-TECH Co., Ltd. can be used.

[0060] <Color coordinates of visible light transmission color a * 、Color coordinate b * 、Color coordinates L * and chroma C * >

[0061] The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * It is preferably -50 or more, more preferably -40 or more, further preferably -30 or more, further preferably -20 or more, further preferably -10 or more, particularly preferably -5 or more, most preferably -2 or more, and preferably 20 or less, more preferably 10 or less, further preferably 5 or less, and particularly preferably 3 or less. The color coordinate a * When the amount is not less than the lower limit and not more than the upper limit, the color of the light control body can be made favorable when observed from the first resin layer side when no voltage is applied.

[0062] The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * It is preferably -20 or more, more preferably -10 or more, and further preferably -5 or more, and is preferably 30 or less, more preferably 20 or less, and further preferably 10 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0063] The visible light transmission color L of the first resin layer * a * b * Color coordinate L in color system * It is preferably 15 or more, more preferably 20 or more, further preferably 22 or more, and preferably less than 100, more preferably 90 or less, further preferably 80 or less, further preferably 70 or less, further preferably 60 or less, further preferably 50 or less, further preferably 40 or less, particularly preferably 30 or less, and most preferably 25 or less. The color coordinate L *When the value is not less than the lower limit and not more than the upper limit (or less than the upper limit), the color of the light modulator can be made good when observed from the first resin layer side when no voltage is applied.

[0064] The visible light transmission color L of the first resin layer * a * b * Chroma C in the color system * It is preferably 0.2 or more, more preferably 0.5 or more, further preferably 1.0 or more, particularly preferably 4.0 or more, and preferably 50 or less, more preferably 40 or less, further preferably 35 or less, further preferably 30 or less, further preferably 20 or less, further preferably 10 or less, particularly preferably 6 or less, and most preferably 3 or less. The chroma C * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0065] The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * It is preferably -30 or more, more preferably -20 or more, further preferably -10 or more, particularly preferably -5 or more, most preferably -2 or more, and preferably 50 or less, more preferably 40 or less, further preferably 30 or less, further preferably 20 or less, particularly preferably 10 or less, and most preferably 0 or less. The color coordinate a * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0066] The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * It is preferably -20 or more, more preferably -10 or more, further preferably -5 or more, particularly preferably 0 or more, and preferably 50 or less, more preferably 40 or less, further preferably 30 or less, further preferably 20 or less, particularly preferably 10 or less, and most preferably 2 or less. The color coordinate b * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0067] The visible light transmission color L of the second resin layer * a * b * Color coordinate L in color system *It is preferably 10 or more, more preferably 20 or more, further preferably 30 or more, particularly preferably 40 or more, most preferably 50 or more, and is preferably less than 100, more preferably 98 or less, further preferably 96 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit (or less than the upper limit), the color of the light modulator can be made good when observed from the second resin layer side when no voltage is applied.

[0068] The visible light transmission color L of the second resin layer * a * b * Chroma C in the color system * It is preferably 0.3 or more, more preferably 0.5 or more, further preferably 2.0 or more, and preferably 70 or less, more preferably 60 or less, further preferably 50 or less, further preferably 30 or less, further preferably 20 or less, particularly preferably 15 or less, and most preferably 5 or less. * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0069] The visible light transmission color of the first resin layer and the visible light transmission color of the second resin layer are L * a * b * The color difference in the colorimetric system is preferably more than 0, more preferably 5 or more, further preferably 10 or more, particularly preferably 20 or more, most preferably 30 or more, and preferably 100 or less, more preferably less than 100, further preferably 90 or less, further preferably 80 or less, further preferably 75 or less, further preferably 60 or less, further preferably 50 or less, further preferably 40 or less, further preferably 30 or less, particularly preferably 20 or less, and most preferably 15 or less. When the color difference is more than the lower limit (or more than the lower limit) and less than the upper limit (or less than the upper limit), the effect of the present invention can be more effectively exerted.

[0070] The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * In this case, the relationship between the first resin layer and the second resin layer is set to be a combination in a complementary color relationship, and when a voltage is applied, an achromatic color or a color close to an achromatic color can be obtained.

[0071] The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The sum of is preferably 15 or less, more preferably 10 or less, and further preferably 5 or less. When the sum is less than the upper limit, the relationship between the first resin layer and the second resin layer is set to be a combination in a complementary color relationship, and when a voltage is applied, it can be an achromatic color or a color close to an achromatic color. The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The sum can be greater than -15, can be greater than -10, can be greater than -5.

[0072] The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The absolute value of the difference is preferably greater than 0, more preferably greater than 1, and is preferably less than 80, more preferably less than 70, further preferably less than 60, further preferably less than 50, further preferably less than 40, further preferably less than 30, further preferably less than 20, particularly preferably less than 10, and most preferably less than 5. When the absolute value of the difference is greater than (or exceeds) the lower limit and less than the upper limit, the effect of the present invention can be further effectively exerted.

[0073] The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system* In this case, the relationship between the first resin layer and the second resin layer is set to be a combination in a complementary color relationship, and when a voltage is applied, an achromatic color or a color close to an achromatic color can be obtained.

[0074] The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The sum of is preferably 15 or less, more preferably 10 or less, and further preferably 5 or less. When the sum is less than the upper limit, the relationship between the first resin layer and the second resin layer is set to be a combination in a complementary color relationship, and when a voltage is applied, it can be an achromatic color or a color close to an achromatic color. The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The sum can be greater than -15, can be greater than -10, can be greater than -5.

[0075] The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The absolute value of the difference is preferably greater than 0, more preferably greater than 1, and preferably less than 30, more preferably less than 20, further preferably less than 10, particularly preferably less than 5, and most preferably less than 2. When the absolute value of the difference is greater than (or exceeds) the lower limit and less than the upper limit, the effect of the present invention can be further effectively exerted.

[0076] The visible light transmission color L of the dimming layer when voltage is applied * a * b * Color coordinate a in the color system *It is preferably -30 or more, more preferably -20 or more, further preferably -10 or more, particularly preferably -5 or more, and is preferably 30 or less, more preferably 20 or less, further preferably 10 or less, particularly preferably 5 or less. The color coordinate a * When the value is not less than the lower limit and not more than the upper limit, the color of the light modulator can be improved when a voltage is applied.

[0077] The visible light transmission color L of the dimming layer when voltage is applied * a * b * Color coordinate b in the color system * It is preferably -30 or more, more preferably -20 or more, further preferably -15 or more, particularly preferably -10 or more, and most preferably -5 or more, and is preferably 30 or less, more preferably 20 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 2 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the light modulator can be improved when a voltage is applied.

[0078] The visible light transmission color L of the dimming layer when voltage is applied * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 8 or more, further preferably 10 or more, and preferably 80 or less, more preferably 70 or less, further preferably 60 or less, further preferably 50 or less, further preferably 40 or less, particularly preferably 30 or less, and most preferably 25 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit, the color of the light modulator can be improved when a voltage is applied.

[0079] It should be noted that the L used to measure the visible light transmission color of the light-adjusting layer when a voltage is applied is * a * b * Color coordinate a in the color system * 、Color coordinate b * And color coordinates L * The applied voltage is preferably within a range of 5V to 100V. The applied voltage is, for example, 30V.

[0080] The visible light transmission color L of the light modulator when voltage is applied * a * b * Color coordinate a in the color system *It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less. The color coordinate a * When the color is not less than the lower limit and not more than the upper limit, an achromatic color or a color close to an achromatic color can be obtained when a voltage is applied.

[0081] The visible light transmission color L of the light modulator when voltage is applied * a * b * Color coordinate b in the color system * It is preferably -15 or more, more preferably -10 or more, and further preferably -5 or more, and is preferably 15 or less, more preferably 10 or less, and further preferably 5 or less. The color coordinate b * When the color is not less than the lower limit and not more than the upper limit, an achromatic color or a color close to an achromatic color can be obtained when a voltage is applied.

[0082] The visible light transmission color L of the light modulator when voltage is applied * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 8 or more, and further preferably 10 or more, and is preferably 80 or less, more preferably 70 or less, and further preferably 60 or less. The color coordinate L * When the color is not less than the lower limit and not more than the upper limit, an achromatic color or a color close to an achromatic color can be obtained when a voltage is applied.

[0083] The visible light transmission color L of the light modulator when voltage is applied * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 1, and preferably less than 25, more preferably less than 15, further preferably less than 8, and particularly preferably less than 5. * When the color is equal to or greater than the lower limit (or exceeds the lower limit) and equal to or less than the upper limit, an achromatic color or a color close to an achromatic color can be obtained when a voltage is applied.

[0084] It should be noted that the L for measuring the visible light transmission color of the light modulator when a voltage is applied is * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C *The applied voltage of " is preferably a voltage in the range of 5V to 100V. The applied voltage is, for example, 30V. It should be noted that the applied voltage used to measure the "visible light transmittance of the dimming body when the voltage is applied" mentioned below is the same.

[0085] The absolute value of the value X obtained by the following formula (X) is preferably greater than 0, more preferably 5 or more, further preferably 10 or more, further preferably 20 or more, further preferably 30 or more, further preferably 40 or more, particularly preferably 50 or more, most preferably 60 or more, and preferably 100 or less, more preferably less than 100, further preferably 90 or less, particularly preferably 80 or less, and most preferably 75 or less. When the absolute value is greater than (or greater than) the lower limit and less than (or less than) the upper limit, the color of the light modulator when no voltage is applied can be made good.

[0086] Value X = AB (X)

[0087] A: The visible light transmission color of the first resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied. * a * b * Color Difference in Color Representation System

[0088] B: The visible light transmission color of the second resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied. * a * b * Color Difference in Color Representation System

[0089] The value Y obtained by the following formula (Y) is preferably 20 or less, more preferably 15 or less, and further preferably 5 or less. When the value Y is below the upper limit, when a voltage is applied, it can be achromatic or nearly achromatic. It should be noted that the value Y can exceed 0 and can be 1 or more.

[0090] Value Y = [(a 1 +a 2 ) 2 +(b 1 +b 2 ) 2 ] 1 / 2 ···(Y)

[0091] a 1 : The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system *

[0092] a2 : The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system *

[0093] b 1 : The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system *

[0094] b 2 : The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system *

[0095] <Color coordinates of visible light reflection color a * 、Color coordinate b * 、Color coordinates L * and chroma C * >

[0096] The visible light reflection color L of the first resin layer * a * b * Color coordinate a in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate a * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0097] The visible light reflection color L of the first resin layer * a * b * Color coordinate b in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0098] The visible light reflection color L of the first resin layer * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 10 or more, further preferably 20 or more, and preferably 70 or less, more preferably 60 or less, further preferably 40 or less, and particularly preferably 30 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0099] The visible light reflection color L of the first resin layer * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 0.5, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. * When the amount exceeds the lower limit and is equal to or less than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0100] The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate a * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0101] The visible light reflection color L of the second resin layer * a * b * Color coordinate b in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made good when observed from the second resin layer side when no voltage is applied.

[0102] The visible light reflection color L of the second resin layer * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 10 or more, further preferably 20 or more, and preferably 70 or less, more preferably 60 or less, further preferably 50 or less, particularly preferably 40 or less, and most preferably 35 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made good when observed from the second resin layer side when no voltage is applied.

[0103] The visible light reflection color L of the second resin layer * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 0.5, and preferably less than 20, more preferably less than 15, further preferably less than 10, particularly preferably less than 5, and most preferably less than 3. * When the value is not less than the lower limit (or exceeds the lower limit) and not more than the upper limit, the color of the light modulator can be made good when observed from the second resin layer side when no voltage is applied.

[0104] The visible light reflection color of the first resin layer and the visible light reflection color of the second resin layer are L * a * b * The color difference in the colorimetric system is preferably greater than 0, more preferably greater than 5, and preferably less than 50, more preferably less than 40, further preferably less than 30, further preferably less than 20, particularly preferably less than 15, and most preferably less than 10. When the color difference is greater than (or exceeds) the lower limit and less than the upper limit, the design property can be further improved.

[0105] The visible light reflection color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * In this case, it is easy to set the relationship between the first resin layer and the second resin layer to be a combination in a complementary color relationship, and when a voltage is applied, it can be an achromatic color or a color close to an achromatic color.

[0106] The visible light reflection color L of the first resin layer * a* b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The sum of is preferably 10 or less, more preferably 5 or less, and further preferably 2 or less. When the sum is less than the upper limit, the relationship between the first resin layer and the second resin layer is set to be a combination in a complementary color relationship, and when a voltage is applied, it can be an achromatic color or a color close to an achromatic color. The visible light reflection color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The sum can be greater than -10, can be greater than -5, can be greater than -2.

[0107] The visible light reflection color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The absolute value of the difference is preferably greater than 0, preferably greater than 1, and preferably less than 40, more preferably less than 30, further preferably less than 20, further preferably less than 15, particularly preferably less than 10, and most preferably less than 5. When the absolute value of the difference is greater than (or exceeds) the lower limit and less than the upper limit, the effect of the present invention can be further effectively exerted.

[0108] The visible light reflection color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate b in the color system *The sum of is preferably 10 or less, more preferably 5 or less, and further preferably 2 or less. When the sum is less than the upper limit, the relationship between the first resin layer and the second resin layer is set to be a combination in a complementary color relationship, and when a voltage is applied, it can be an achromatic color or a color close to an achromatic color. The visible light reflection color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate b in the color system * The sum can be greater than -10, can be greater than -5, can be greater than -2.

[0109] The visible light reflection color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate b in the color system * The absolute value of the difference is preferably greater than 0, preferably greater than 1, and preferably less than 30, more preferably less than 20, further preferably less than 10, particularly preferably less than 5, and most preferably less than 3. When the absolute value of the difference is greater than (or exceeds) the lower limit and less than the upper limit, the effect of the present invention can be further effectively exerted.

[0110] When no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side is * a * b * Color coordinate a in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate a * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0111] When no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side is * a * b * Color coordinate b in the color system *It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0112] When no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side is * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 10 or more, further preferably 20 or more, and preferably 60 or less, more preferably 50 or less, further preferably 40 or less, and particularly preferably 30 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit, the color of the light control body can be made good when observed from the first resin layer side when no voltage is applied.

[0113] When no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side is * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 0.2, and preferably less than 30, more preferably less than 20, further preferably less than 10, particularly preferably less than 5, and most preferably less than 3. * When the value is not less than the lower limit (or exceeds the lower limit) and not more than the upper limit, the color of the light modulator can be made good when observed from the first resin layer side when no voltage is applied.

[0114] When no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side is * a * b * Color coordinate a in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate a * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0115] When no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side is * a * b * Color coordinate b in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate b * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0116] When no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side is * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 10 or more, further preferably 20 or more, particularly preferably 30 or more, most preferably 35 or more, and preferably 60 or less, more preferably 50 or less, further preferably 40 or less. The color coordinate L * When the amount is not less than the lower limit and not more than the upper limit, the color of the light modulator can be made favorable when observed from the second resin layer side when no voltage is applied.

[0117] When no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side is * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 0.5, and preferably less than 30, more preferably less than 20, further preferably less than 10, and particularly preferably less than 5. The chroma C * When the value is not less than the lower limit (or exceeds the lower limit) and not more than the upper limit, the color of the light modulator can be made good when observed from the second resin layer side when no voltage is applied.

[0118] The visible light reflection color of the light modulator when measured from the first resin layer side when no voltage is applied and the visible light reflection color of the light modulator when measured from the second resin layer side when no voltage is applied * a * b *The color difference in the colorimetric system is preferably 0.5 or more, more preferably 5 or more, further preferably 10 or more, and preferably 50 or less, more preferably 40 or less, further preferably 30 or less, and particularly preferably 20 or less. When the color difference is above the lower limit and below the upper limit, when no voltage is applied, the color difference when observed from the first resin layer side and when observed from the second resin layer side increases, so the design of the light modulator can be improved.

[0119] <Visible light transmittance and visible light spectrum>

[0120] The visible light transmittance of the first resin layer is preferably greater than 0%, more preferably greater than 2%, further preferably greater than 4%, and preferably less than 100%, preferably less than 95%, more preferably less than 85%, further preferably less than 75%, further preferably less than 65%, further preferably less than 55%, further preferably less than 45%, further preferably less than 35%, particularly preferably less than 25%, and most preferably less than 15%.

[0121] The visible light transmittance of the second resin layer is preferably greater than 0%, more preferably greater than 10%, further preferably greater than 20%, further preferably greater than 25%, further preferably greater than 35%, further preferably greater than 45%, further preferably greater than 55%, particularly preferably greater than 65%, most preferably greater than 75%, and preferably less than 100%, more preferably less than 95%, further preferably less than 90%.

[0122] It is preferable that the visible light transmittance of the first resin layer and the visible light transmittance of the second resin layer are different.

[0123] The visible light transmittance of the dimming body when voltage is applied is preferably above 0.2%, more preferably above 0.5%, further preferably above 1%, particularly preferably above 3%, and preferably below 60%, more preferably below 50%, further preferably below 40%, further preferably below 30%, further preferably below 20%, particularly preferably below 10%, and most preferably below 5%.

[0124] When obtaining the visible light spectrum of the first resin layer at a wavelength of 380 nm to 780 nm, the main wavelength of visible light of the first resin layer preferably exists in a wavelength of 550 nm to 780 nm, and more preferably exists in a wavelength of 580 nm to less than 780 nm.

[0125] When obtaining the visible light spectrum of the second resin layer at a wavelength of 380nm to 780nm, the main wavelength of visible light of the second resin layer is preferably present at a wavelength of greater than 380nm and less than 650nm, more preferably at a wavelength of greater than 380nm and less than 580nm, further preferably at a wavelength of greater than 380nm and less than 580nm, and particularly preferably at a wavelength of greater than 380nm and less than 550nm.

[0126] When the visible light spectrum of the first resin layer at a wavelength of 380nm to 780nm and the visible light spectrum of the second resin layer at a wavelength of 380nm to 780nm are obtained respectively, the ratio of the peak height of the main wavelength of visible light of the second resin layer to the peak height of the main wavelength of visible light of the first resin layer is taken as the ratio (A). The ratio (A) is preferably greater than 0, preferably less than 5, more preferably less than 4, further preferably less than 3, further preferably less than 2, particularly preferably less than 1, and most preferably less than 0.5. When the ratio (A) exceeds the lower limit and is less than the upper limit, it is easy to set the relationship between the first resin layer and the second resin layer to a combination in a complementary color relationship, and when a voltage is applied, it can be a color that is achromatic or close to achromatic.

[0127] The visible light transmittance and the visible light spectrum can be measured in the following manner.

[0128] Prepare a measurement object (the first resin layer, the second resin layer or the dimming body). When the measurement object is the first resin layer or the second resin layer, the first resin layer and the second resin layer can be peeled off from the dimming body to prepare the first resin layer and the second resin layer. The prepared measurement object is sandwiched between two sheets of transparent glass with a thickness of 2.5 mm based on JISR3202:1996 to obtain a laminate. The obtained laminate is placed in a rubber bag, degassed at a vacuum degree of 2.6 kPa for 20 minutes, and then directly moved to an oven after degassed, and further maintained at 90°C for 30 minutes for vacuum pressing to pre-press the laminate. The pre-pressed laminate is pressed for 20 minutes under the conditions of 135°C and a pressure of 1.2 MPa in an autoclave to obtain a measurement sample (laminated glass for measurement).

[0129] The visible light transmittance and visible light spectrum of the measurement sample (laminated glass for measurement) are respectively used as the visible light transmittance and visible light spectrum of the measurement object. In other words, the visible light transmittance and visible light spectrum of the measurement sample are respectively used as the visible light transmittance and visible light spectrum of the measurement object, i.e., the first resin layer, the second resin layer, or the light modulator.

[0130] The visible light transmittance of the measurement sample can be measured using a spectrophotometer (e.g., "U-4150" manufactured by HITACHI HIGH-TECH Corporation) based on JIS R3212:2021 at wavelengths of 380 nm to 780 nm under the A light source specified in JIS Z8701. It should be noted that it is preferable to measure the visible light transmittance at the central position of the top view of the object to be measured.

[0131] The main visible light wavelength refers to the wavelength with the lowest transmittance among the absorption wavelengths caused by the colorant in the visible light spectrum.

[0132] Hereinafter, each component used in the light control body of the present invention will be further described.

[0133] (Light control layer)

[0134] The light control layer is a layer having light control properties. The light control property refers to the property that the optical properties change by the赋予 of energy. Examples of the energy include light energy, electric energy, and heat energy. The light control layer is preferably a layer that changes the visible light transmittance according to the presence or absence of voltage application and can adjust the incident light amount. The material of the light control layer is not particularly limited and can be any material as long as it has light control properties.

[0135] Examples of the mode of the light control layer include the PDLC (Polymer Dispersed Liquid Crystal) mode, the SPD (Suspended Particle Device) mode, and the electrochromic mode. From the viewpoint of further improving the light control performance, the light control layer is preferably a light control layer in the PDLC mode, the SPD mode, or the electrochromic mode. The light control layer can be a light control layer in the PDLC mode or the SPD mode. The light control layer can be an electrochromic mode light control layer. The light control layer can be a PDLC mode light control layer. The light control layer can be an SPD mode light control layer. In addition, the light control layer can be of the TN type or the STN type. The light control body and the laminated glass can be free of a liquid crystal display device. The light control body and the laminated glass can be free of the light control layer in the liquid crystal display device. The light control body can be other than a liquid crystal display device and can be a light control body other than a liquid crystal display device.

[0136] <PDLC mode>

[0137] The dimming layer in the PDLC mode preferably contains an adhesive and a liquid crystal material dispersed in the adhesive. In the dimming layer in the PDLC mode, the liquid crystal material may be the inclusion of microcapsules. That is, the mode of the dimming layer in the PDLC mode may be the microcapsule-type liquid crystal mode (PDMLC).

[0138] The liquid crystal material preferably has the property of changing its orientation by the application of voltage. The liquid crystal material may be dispersed as a continuous phase in the adhesive, or may be dispersed in the adhesive in the form of liquid crystal droplets or liquid crystal capsules. Examples of the liquid crystal material include nematic liquid crystals and cholesteric liquid crystals.

[0139] Examples of the material of the cholesteric liquid crystal include: steroid cholesterol derivatives, Schiff base compounds, azo compounds, azoxy compounds, benzoate compounds, biphenyl compounds, terphenyl compounds, cyclohexylcarboxylate compounds, phenylcyclohexane compounds, biphenylcyclohexane compounds, pyrimidine compounds, dioxane compounds, cyclohexylcyclohexane ester compounds, cyclohexylethane compounds, cyclohexane compounds, diphenylacetylene compounds, alkenyl compounds, stilbene compounds, fused polycyclic compounds, etc., nematic liquid crystals, smectic liquid crystals, and materials obtained by adding a chiral component containing an optically active material such as Schiff base compounds, azo compounds, ester compounds, biphenyl compounds, etc. to their mixed liquid crystals. The material of the cholesteric liquid crystal may be used alone or in combination of two or more.

[0140] The adhesive holds the liquid crystal material and inhibits the flow of the liquid crystal material. The adhesive is preferably insoluble in the liquid crystal material, has a strength capable of withstanding external forces, and has high transmittance to reflected light and incident light. Examples of the material of the adhesive include water-soluble polymer materials such as gelatin, polyvinyl alcohol, polyvinyl acetal resin, cellulose derivatives, polyacrylic polymers, ethyleneimine, polyethylene oxide, polyacrylamide, polystyrene sulfonate, polyamidine, isoprene sulfonic acid polymers, etc., and materials capable of being water-emulsified such as fluororesins, polysiloxane resins, acrylic resins, polyurethane resins, epoxy resins, etc. The material of the adhesive may be used alone or in combination of two or more.

[0141] The adhesive is preferably crosslinked by a crosslinking agent. The crosslinking agent is not particularly limited as long as it forms crosslinks between the adhesives to harden, insolubilize or make the adhesive insoluble. Examples of the crosslinking agent include acetaldehyde, glutaraldehyde, glyoxal, potassium alum hydrate of polyvalent metal salt compounds, adipic dihydrazide, melamine formalin oligomers, ethylene glycol diglycidyl ether, polyamide epichlorohydrin, and polycarbodiimide. The crosslinking agent may be used alone or in combination of two or more.

[0142] <SPD mode>

[0143] The SPD type light-adjusting layer preferably includes a resin matrix and a light-adjusting suspension dispersed in the resin matrix.

[0144] The light-adjusting suspension comprises a dispersion medium and light-adjusting particles dispersed in the dispersion medium.

[0145] Examples of the light-adjusting particles include carbon materials such as polyiodide and carbon black, metal materials such as copper, nickel, iron, cobalt, chromium, titanium, and aluminum, and inorganic compound materials such as silicon nitride, titanium nitride, and aluminum oxide. In addition, particles obtained by coating these materials with polymers may be used. The light-adjusting particles may be used alone or in combination of two or more.

[0146] The dispersion medium disperses the dimming particles in a flowable state. The dispersion medium is preferably a material that selectively adheres to the dimming particles, covers the dimming particles, acts in a manner that causes the dimming particles to move to the phase-separated droplet phase when phase-separated from the resin matrix, has no conductivity, and has no affinity with the resin matrix. In addition, the dispersion medium is preferably a liquid copolymer that has a refractive index similar to that of the resin matrix when the dimming laminate is made. As the liquid copolymer, a (meth)acrylate oligomer having a fluorine group or a hydroxyl group is preferred, and a (meth)acrylate oligomer having a fluorine group and a hydroxyl group is more preferred. When such a copolymer is used, the monomer unit of the fluorine group or the hydroxyl group is oriented toward the dimming particle side, and the remaining monomer units stabilize the droplets of the dimming suspension in the resin matrix. Therefore, the dimming particles are easily dispersed in the dimming suspension, and when phase-separated from the resin matrix, the dimming particles are easily induced into the phase-separated droplets.

[0147] Examples of the (meth)acrylate oligomer having a fluorine group or a hydroxyl group include: 2,2,2-trifluoroethyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, 3,5,5-trimethylhexyl acrylate / 2-hydroxypropyl acrylate / fumaric acid copolymer, butyl acrylate / 2-hydroxyethyl acrylate copolymer, 2,2,3,3-tetrafluoropropyl acrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, 1H,1H,5H-octafluoropentyl acrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, 1H,1H,5H-octafluoropentyl acrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, H,1H,2H,2H-heptadecafluorodecyl ester / butyl acrylate / 2-hydroxyethyl acrylate copolymer, 2,2,2-trifluoroethyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, 2,2,3,3-tetrafluoropropyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, 1H,1H,5H-octafluoropentyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer, and 1H,1H,2H,2H-heptadecafluorodecyl methacrylate / butyl acrylate / 2-hydroxyethyl acrylate copolymer. In addition, these (meth)acrylate oligomers preferably have both a fluorine group and a hydroxyl group.

[0148] The weight average molecular weight of the (meth)acrylate oligomer is preferably 1,000 or more, more preferably 2,000 or more, and is preferably 20,000 or less, more preferably 10,000 or less.

[0149] The dimming layer may be prepared using the resin material used to form the resin matrix and the dimming suspension.

[0150] The resin material is preferably a resin material that is cured by irradiation with energy rays. As the resin material that is cured by irradiation with energy rays, there can be mentioned a polymer composition containing a photopolymerization initiator and a polymer compound that is cured by energy rays such as ultraviolet rays, visible light, and electron beams. As the polymer composition, there can be mentioned a polymer composition containing a polymerizable monomer having an ethylenically unsaturated group and a photopolymerization initiator. As the polymerizable monomer having an ethylenically unsaturated group, there can be mentioned a non-crosslinking monomer and a crosslinking monomer.

[0151] Examples of the non-crosslinking monomer include: styrene monomers such as styrene, α-methylstyrene, and chlorostyrene as vinyl compounds; vinyl ether compounds such as methyl vinyl ether, ethyl vinyl ether, and propyl vinyl ether; vinyl acetate compounds such as vinyl butyrate, vinyl laurate, and vinyl stearate; halogen-containing monomers such as vinyl chloride and vinyl fluoride; (meth)acrylic acid compounds such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, cetyl (meth)acrylate, and propylene (meth)acrylate; (Meth)acrylate alkyl ester compounds such as stearyl (meth)acrylate, cyclohexyl (meth)acrylate, and isobornyl (meth)acrylate; (meth)acrylate compounds containing oxygen atoms such as 2-hydroxyethyl (meth)acrylate, glyceryl (meth)acrylate, polyoxyethylene (meth)acrylate, and glycidyl (meth)acrylate; nitrile-containing monomers such as (meth)acrylonitrile; (meth)acrylate compounds containing halogens such as trifluoromethyl (meth)acrylate and pentafluoroethyl (meth)acrylate; olefin compounds such as diisobutylene, isobutylene, linear olefins, ethylene, and propylene as α-olefin compounds; isoprene and butadiene as conjugated diene compounds.

[0152] Examples of the crosslinking monomer include vinyl monomers such as divinylbenzene, 1,4-divinyloxybutane, and divinyl sulfone as vinyl compounds; tetramethylolmethane tetra(meth)acrylate, polytetramethylene glycol diacrylate, tetramethylolmethane tri(meth)acrylate, tetramethylolmethane di(meth)acrylate, trimethylolpropane tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol penta(meth)acrylate, glycerol tri(meth)acrylate, glycerol di(meth)acrylate, polyethylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate as (meth)acrylic compounds. As the allyl compound, there are triallyl (iso)cyanurate, triallyl trimellitate, diallyl phthalate, diallyl acrylamide, and diallyl ether; as the silane compound, there are tetramethoxysilane, tetraethoxysilane, methyl trimethoxysilane, methyl triethoxysilane, ethyl trimethoxysilane, ethyl triethoxysilane, isopropyl trimethoxysilane, isobutyl trimethoxysilane, cyclohexyl trimethoxysilane, n-hexyl trimethoxysilane, n-octyl triethoxysilane, and n-decyl trimethoxysilane. Alkoxysilane compounds such as methyltrimethoxysilane, phenyltrimethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diisopropyldimethoxysilane, trimethoxysilylstyrene, γ-(meth)acryloxypropyltrimethoxysilane, 1,3-divinyltetramethyldisiloxane, methylphenyldimethoxysilane, and diphenyldimethoxysilane; vinyltrimethoxysilane, vinyltriethoxysilane, dimethoxymethylvinylsilane, dimethoxyethylvinylsilane, diethoxymethylvinylsilane, diethoxyethylvinylsilane, ethylmethyldivinylsilane, methylvinyldimethoxysilane, and ethylethyl Alkoxysilanes containing polymerizable double bonds such as alkenyldimethoxysilane, methylvinyldiethoxysilane, ethylvinyldiethoxysilane, p-phenylvinyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, and 3-acryloxypropyltrimethoxysilane; cyclic siloxanes such as decamethylcyclopentasiloxane; modified (reactive) silicone oils such as single-end modified silicone oils, double-end silicone oils, and side chain silicone oils; carboxyl-containing monomers such as (meth)acrylic acid, maleic acid, and maleic anhydride, etc.

[0153] Examples of the photopolymerization initiator include 2,2-dimethoxy-1,2-diphenylethane-1-one, 1-(4-(2-hydroxyethoxy)phenyl)-2-hydroxy-2-methyl-1-propane-1-one, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenylpropane-1-one, and (1-hydroxycyclohexyl)phenyl ketone.

[0154] The resin material may include an organic solvent-soluble resin, a thermoplastic resin, poly(meth)acrylic acid, etc. In addition, the resin material may include various additives such as an anti-coloring agent, an antioxidant, and an adhesion-imparting agent, and may also include a solvent.

[0155] <Electrochromic method>

[0156] The electrochromic light-adjusting layer preferably contains an electrochromic substance.

[0157] As the electrochromic substance, inorganic compounds having electrochromic properties, organic compounds having electrochromic properties, and mixed valence complexes having electrochromic properties can be cited. As the inorganic compound having electrochromic properties, tungsten oxide, molybdenum oxide, iridium oxide, nickel oxide, vanadium pentoxide, and titanium oxide can be cited. As the organic compound having electrochromic properties, polypyrrole compounds, polythiophene compounds, polyparaphenylene vinylene compounds, polyaniline compounds, polyacetylene compounds, polyethylene dioxythiophene compounds, metal phthalocyanine compounds, viologen compounds, viologen salt compounds, ferrocene compounds, dimethyl terephthalate compounds, and diethyl terephthalate compounds can be cited. As the mixed valence complex having electrochromic properties, Prussian blue type complexes (KFe[Fe(CN) 6 ] etc.) The electrochromic material may be used alone or in combination of two or more.

[0158] <Other details of the dimming layer>

[0159] The average thickness of the dimming layer is preferably 0.1 μm or more, more preferably 0.3 μm or more, and preferably 1.0 μm or less, more preferably 0.6 μm or less. When the average thickness of the dimming layer is above the lower limit and below the upper limit, the dimming effect of the dimming layer becomes significant.

[0160] (First resin layer and second resin layer)

[0161] In the dimming body, the color of the first resin layer is different from the color of the second resin layer. "The color of the first resin layer is different from the color of the second resin layer" means that the following configuration (A) or the following configuration (B) is satisfied. It should be noted that both the following configuration (A) and the following configuration (B) may be satisfied.

[0162] Configuration (A): The visible light transmission color of the first resin layer and the visible light transmission color of the second resin layer are L * a * b * The color difference in the color system exceeds 0.

[0163] Configuration (B): The visible light reflection color of the first resin layer and the visible light reflection color of the second resin layer are L * a * b * The color difference in the color system exceeds 0.

[0164] In order to make the first resin layer and the second resin layer have different colors, it is preferred that the first resin layer and the second resin layer have different compositions.

[0165] <Resin>

[0166] The first resin layer contains a resin. The first resin layer preferably contains a thermoplastic resin (hereinafter, sometimes referred to as thermoplastic resin (1)). The first resin layer, as a thermoplastic resin (1), preferably contains a polyvinyl acetal resin (hereinafter, sometimes referred to as polyvinyl acetal resin (1)). The second resin layer contains a resin. The second resin layer preferably contains a thermoplastic resin (hereinafter, sometimes referred to as thermoplastic resin (2)). The second resin layer, as a thermoplastic resin (2), preferably contains a polyvinyl acetal resin (hereinafter, sometimes referred to as polyvinyl acetal resin (2)). The thermoplastic resin (1) and the thermoplastic resin (2) may be the same or different. The polyvinyl acetal resin (1) and the polyvinyl acetal resin (2) may be the same or different. The thermoplastic resin (1) and the thermoplastic resin (2) may be used alone or in combination of two or more. The polyvinyl acetal resin (1) and the polyvinyl acetal resin (2) may be used alone or in combination of two or more.

[0167] Examples of the thermoplastic resin include polyvinyl acetal resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin, (meth)acrylic resin, polyolefin resin, ionomer resin, and polyvinyl alcohol resin. Thermoplastic resins other than these may be used.

[0168] The polyvinyl acetal resin can be produced, for example, by acetalizing polyvinyl alcohol (PVA) with aldehyde. The polyvinyl acetal resin is preferably an acetalized product of polyvinyl alcohol. The polyvinyl alcohol can be obtained, for example, by saponifying polyvinyl acetate. The degree of saponification of the polyvinyl alcohol is generally in the range of 70 mol% to 99.9 mol%.

[0169] The average degree of polymerization of the polyvinyl alcohol (PVA) is preferably 200 or more, more preferably 500 or more, further preferably 1500 or more, further preferably 1600 or more, particularly preferably 2600 or more, most preferably 2700 or more, and preferably 5000 or less, more preferably 4000 or less, further preferably 3500 or less. When the average degree of polymerization is above the lower limit, the penetration resistance of the laminated glass is further improved. When the average degree of polymerization is below the upper limit, the molding of the dimming body becomes easy.

[0170] The average degree of polymerization of the polyvinyl alcohol is determined by a method in accordance with JIS K6726 "Testing methods for polyvinyl alcohol".

[0171] The number of carbon atoms in the acetal group contained in the polyvinyl acetal resin is not particularly limited. The aldehyde used in the manufacture of the polyvinyl acetal resin is not particularly limited. The number of carbon atoms in the acetal group in the polyvinyl acetal resin is preferably 3 to 5, more preferably 3 or 4. When the number of carbon atoms in the acetal group in the polyvinyl acetal resin is 3 or more, the glass transition temperature of the dimming body becomes sufficiently low. The number of carbon atoms in the acetal group in the polyvinyl acetal resin may be 4 or 5.

[0172] The aldehyde is not particularly limited. Generally, aldehydes having 1 to 10 carbon atoms are preferably used. As the aldehyde having 1 to 10 carbon atoms, for example, propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexanal, n-octanal, n-nonanal, n-decanal, formaldehyde, acetaldehyde and benzaldehyde can be mentioned. The aldehyde is preferably propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-hexanal or n-valeraldehyde, more preferably propionaldehyde, n-butyraldehyde or isobutyraldehyde, and further preferably n-butyraldehyde. The aldehyde may be used alone or in combination of two or more.

[0173] The content of each hydroxyl group of the polyvinyl acetal resin (1) and the polyvinyl acetal resin (2) is preferably 25 mol% or more, more preferably 28 mol% or more, further preferably 30 mol% or more, further preferably more than 31 mol%, further preferably 31.5 mol% or more, particularly preferably 32 mol% or more, most preferably 33 mol% or more, and preferably 38 mol% or less, more preferably 37 mol% or less, further preferably 36.5 mol% or less, particularly preferably 36 mol% or less. When the content of the hydroxyl group is above or exceeds the lower limit, the adhesive force of the dimming body is further improved. In addition, when the content of the hydroxyl group is below the upper limit, the flexibility of the dimming body becomes higher, and the handling of the dimming body becomes easier.

[0174] The hydroxyl content of the polyvinyl acetal resin is a value expressed as a percentage of the molar fraction obtained by dividing the amount of ethylene groups to which hydroxyl groups are bonded by the total amount of ethylene groups in the main chain. The amount of ethylene groups to which hydroxyl groups are bonded can be measured, for example, in accordance with JIS K6728 "Testing methods for polyvinyl butyral".

[0175] The acetylation degree of each of the polyvinyl acetal resin (1) and the polyvinyl acetal resin (2) is preferably 0.01 mol% or more, more preferably 0.5 mol% or more, and preferably 10 mol% or less, more preferably 2 mol% or less. When the acetylation degree is above the lower limit, the compatibility of the polyvinyl acetal resin with the plasticizer becomes higher. When the acetylation degree is below the upper limit, the moisture resistance of the light-adjusting body and the laminated glass becomes higher.

[0176] The acetylation degree is a value expressed as a percentage of the molar fraction obtained by dividing the amount of ethylene groups to which an acetyl group is bonded by the total amount of ethylene groups in the main chain. The amount of ethylene groups to which an acetyl group is bonded can be measured, for example, in accordance with JIS K6728 "Testing methods for polyvinyl butyral".

[0177] The acetalization degree of each of the polyvinyl acetal resin (1) and the polyvinyl acetal resin (2) (the butyralization degree in the case of the polyvinyl butyral resin) is preferably 55 mol% or more, more preferably 60 mol% or more, and preferably 75 mol% or less, more preferably 71 mol% or less. When the acetalization degree is above the lower limit, the compatibility of the polyvinyl acetal resin with the plasticizer becomes higher. When the acetalization degree is below the upper limit, the reaction time required for producing the polyvinyl acetal resin becomes shorter.

[0178] The acetalization degree is obtained in the following manner. First, the value obtained by deducting the ethylene amount bonded with hydroxyl and the ethylene amount bonded with acetyl from the total ethylene amount of the main chain is obtained. The obtained value is divided by the total ethylene amount of the main chain to obtain the mole fraction. The value expressed as a percentage of the mole fraction is the acetalization degree.

[0179] It should be noted that the hydroxyl content (hydroxyl amount), acetalization degree (butyralization degree) and acetylation degree are preferably calculated from the results obtained by the method based on JIS K6728 "Testing methods for polyvinyl butyral". However, the measurement based on ASTM D1396-92 can also be used. In the case where the polyvinyl acetal resin is a polyvinyl butyral resin, the hydroxyl content (hydroxyl amount), acetalization degree (butyralization degree) and acetylation degree are calculated from the results obtained by the method based on JIS K6728 "Testing methods for polyvinyl butyral".

[0180] The content of the polyvinyl acetal resin in 100 wt % of the thermoplastic resin in the first resin layer is preferably 10 wt % or more, more preferably 30 wt % or more, further preferably 50 wt % or more, further preferably 70 wt % or more, particularly preferably 80 wt % or more, and most preferably 90 wt % or more. The content of the polyvinyl acetal resin in 100 wt % of the thermoplastic resin in the first resin layer is preferably 100 wt % or less. The main component (50 wt % or more) of the thermoplastic resin in the first resin layer is preferably polyvinyl acetal resin.

[0181] In 100 wt % of the thermoplastic resin in the second resin layer, the content of the polyvinyl acetal resin is preferably 10 wt % or more, more preferably 30 wt % or more, further preferably 50 wt % or more, further preferably 70 wt % or more, particularly preferably 80 wt % or more, and most preferably 90 wt % or more. In 100 wt % of the thermoplastic resin contained in the second resin layer, the content of the polyvinyl acetal resin is preferably 100 wt % or less. The main component (50 wt % or more) of the thermoplastic resin in the second resin layer is preferably polyvinyl acetal resin.

[0182] <Plasticizer>

[0183] From the viewpoint of further improving the adhesive force of the light modulator, the first resin layer preferably contains a plasticizer (hereinafter sometimes referred to as plasticizer (1)). From the viewpoint of further improving the adhesive force of the light modulator, the second resin layer preferably contains a plasticizer (hereinafter sometimes referred to as plasticizer (2)). The layer containing the polyvinyl acetal resin preferably contains a plasticizer.

[0184] The plasticizer is not particularly limited. As the plasticizer, conventionally known plasticizers can be used. The plasticizers can be used alone or in combination of two or more.

[0185] Examples of the plasticizer include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, organic phosphoric acid plasticizers, and organic phosphorous acid plasticizers. The plasticizer is preferably an organic ester plasticizer. The plasticizer is preferably a liquid plasticizer.

[0186] As the monobasic organic acid ester, there can be mentioned glycol esters obtained by reacting glycol with a monobasic organic acid, etc. As the glycol, there can be mentioned triethylene glycol, tetraethylene glycol and tripropylene glycol, etc. As the monobasic organic acid, there can be mentioned butyric acid, isobutyric acid, hexanoic acid, 2-ethylbutyric acid, heptyl acid, n-octanoic acid, 2-ethylhexyl acid, n-nonanoic acid, decanoic acid and benzoic acid, etc.

[0187] Examples of the polybasic organic acid ester include ester compounds of polybasic organic acids and alcohols having a linear or branched structure having 4 to 8 carbon atoms. Examples of the polybasic organic acid include adipic acid, sebacic acid, and azelaic acid.

[0188] Examples of the organic ester plasticizer include triethylene glycol di-2-ethyl propionate, triethylene glycol di-2-ethyl butyrate, triethylene glycol di-2-ethyl hexanoate, triethylene glycol dioctanoate, triethylene glycol di-n-octanoate, triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate, ethylene glycol di-2-ethyl butyrate, 1,3-propylene glycol di-2-ethyl butyrate, 1,4-butylene glycol di-2-ethyl butyrate, diethylene glycol di-2-ethyl butyrate, and 1,4-butylene glycol di-2-ethyl butyrate. The organic ester plasticizer can be any of the following: ester, diethylene glycol di-2-ethylhexanoate, dipropylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylvalerate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dicaprylate, diethylene glycol dibenzoate, dipropylene glycol dibenzoate, dihexyl adipate, dioctyl adipate, hexylcyclohexyl adipate, a mixture of heptyl adipate and nonyl adipate, diisononyl adipate, diisodecyl adipate, heptylnonyl adipate, dibutyl sebacate, oil-modified sebacic acid alcohol ester, and a mixture of phosphoric acid ester and adipic acid ester. As the organic ester plasticizer, organic ester plasticizers other than these can be used. In addition, as the adipic acid ester, other adipic acid esters other than the above-mentioned adipic acid ester can be used.

[0189] Examples of the organic phosphoric acid plasticizer include tributoxyethyl phosphate, isodecylphenyl phosphate, and triisopropyl phosphate.

[0190] The plasticizer is preferably a diester plasticizer represented by the following formula (1).

[0191] [Chemical formula 1]

[0192]

[0193] In the formula (1), R1 and R2 each represent an organic group having 2 to 10 carbon atoms, R3 represents an ethylene group, an isopropylene group or an n-propylene group, and p represents an integer from 3 to 10. R1 and R2 in the formula (1) each preferably represent an organic group having 5 to 10 carbon atoms, and more preferably represent an organic group having 6 to 10 carbon atoms.

[0194] The plasticizer preferably includes triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH) or triethylene glycol di-2-ethylpropionate. The plasticizer more preferably includes triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH), and further preferably includes triethylene glycol di-2-ethylhexanoate (3GO).

[0195] In the first resin layer, the content of the plasticizer (1) relative to 100 parts by weight of the thermoplastic resin (1) is referred to as content (1). In the second resin layer, the content of the plasticizer (2) relative to 100 parts by weight of the thermoplastic resin (2) is referred to as content (2). The content (1) and the content (2) are each preferably 5 parts by weight or more, more preferably 10 parts by weight or more, further preferably 15 parts by weight or more, further preferably 20 parts by weight or more, particularly preferably 24 parts by weight or more, and most preferably 25 parts by weight or more, and preferably 45 parts by weight or less, more preferably 40 parts by weight or less, further preferably 35 parts by weight or less, particularly preferably 32 parts by weight or less, and most preferably 30 parts by weight or less. When the content (1) and the content (2) are at least the lower limit, the flexibility of the dimming body becomes higher and the dimming body becomes easier to handle. When the content (1) and the content (2) are at most the upper limit, the penetration resistance of the laminated glass is further improved.

[0196] <Colorant>

[0197] The first resin layer may or may not contain a colorant. The second resin layer may or may not contain a colorant. The first resin layer preferably contains a colorant. The second resin layer preferably contains a colorant. By using the colorant, the dimming body can be well colored to a desired hue. Only one type of the colorant can be used, or two or more types can be used in combination. The first resin layer may contain only one colorant, may contain more than two types, may contain more than three types, may contain less than 10 types, and may contain less than 5 types. The second resin layer may contain only one colorant, may contain more than two types, may contain more than three types, may contain less than 10 types, and may contain less than 5 types.

[0198] In order to make the colors of the first resin layer and the second resin layer differ well, it is preferred that the first resin layer contains a colorant, the second resin layer does not contain a colorant or contains a colorant, and when the second resin layer contains a colorant, the colorant in the first resin layer contains a colorant of a different type from the colorant in the second resin layer. In order to make the colors of the first resin layer and the second resin layer differ well, it is preferred that the first resin layer contains a colorant, the second resin layer contains a colorant, and the colorant in the first resin layer contains a colorant of a different type from the colorant in the second resin layer.

[0199] Examples of the colorant include pigments and dyes. The colorant may be a pigment, a dye, or both a pigment and a dye. It should be noted that there are colorants that are classified into both pigments and dyes.

[0200] pigment:

[0201] The colorant may include a pigment, which may be a pigment. The first resin layer may include or not include a pigment. The second resin layer may include or not include a pigment. The first resin layer preferably includes a pigment. The second resin layer preferably includes a pigment. The pigment may be used alone or in combination of two or more. The first resin layer may include only one pigment, or may include two or more, or may include three or more, and may include less than 10, or may include less than 5. The second resin layer may include only one pigment, or may include two or more, or may include three or more, and may include less than 10, or may include less than 5.

[0202] Examples of the pigment include perylene compounds, threne compounds, quinacridone compounds, diketopyrrolopyrrole compounds, anthraquinone compounds, pyrene compounds, phthalocyanine compounds, indanthrene compounds, indigo compounds, isoindolinone compounds, nickel complex compounds, methine compounds, azomethine compounds, dioxazine, azo compounds, and carbon black.

[0203] When the first resin layer contains a pigment, the content of the pigment in 100 wt % of the first resin layer is preferably 0.01 wt % or more, more preferably 0.02 wt % or more, and preferably 0.15 wt % or less, more preferably 0.12 wt % or less. When the content of the pigment is above the lower limit and below the upper limit, the effect of the present invention can be more effectively exerted.

[0204] When the second resin layer contains a pigment, the content of the pigment in 100 wt % of the second resin layer is preferably 0.01 wt % or more, more preferably 0.02 wt % or more, and preferably 0.15 wt % or less, more preferably 0.12 wt % or less. When the content of the pigment is above the lower limit and below the upper limit, the effect of the present invention can be further effectively exerted.

[0205] dye:

[0206] The colorant may include a dye, which may be a dye. The first resin layer may include or not include a dye. The second resin layer may include or not include a dye. The first resin layer preferably includes a dye. The second resin layer preferably includes a dye. The dye may be used alone or in combination of two or more. The first resin layer may include only one dye, or may include two or more, or may include three or more, and may include less than 10, or may include less than 5. The second resin layer may include only one dye, or may include two or more, or may include three or more, and may include less than 10, or may include less than 5.

[0207] Examples of the dye include perylene compounds, threne compounds, quinacridone compounds, diketopyrrolopyrrole compounds, anthraquinone compounds, pyrene compounds, phthalocyanine compounds, indanthrene compounds, indigo compounds, isoindolinone compounds, nickel complex compounds, methine compounds, azomethine compounds, dioxazine and azo compounds.

[0208] When the first resin layer contains a dye, the content of the dye in 100 wt % of the first resin layer is preferably 0.00001 wt % or more, more preferably 0.0001 wt % or more, and further preferably 0.001 wt % or more, and preferably less than 0.015 wt %, more preferably less than 0.01 wt %. When the content of the dye is above the lower limit and below the upper limit (or below the upper limit), the effect of the present invention can be further effectively exerted.

[0209] When the second resin layer contains a dye, the content of the dye in 100 wt % of the second resin layer is preferably 0.00001 wt % or more, more preferably 0.0001 wt % or more, and further preferably 0.001 wt % or more, and preferably less than 0.015 wt %, more preferably less than 0.01 wt %. When the content of the dye is above the lower limit and below the upper limit (or below the upper limit), the effect of the present invention can be further effectively exerted.

[0210] When the first resin layer contains a colorant, the content of the colorant in 100% by weight of the first resin layer is preferably 0.00001% by weight or more, more preferably 0.0001% by weight or more, and further preferably 0.001% by weight or more, and is preferably less than 0.015% by weight, and more preferably less than 0.01% by weight. When the content of the colorant is greater than the lower limit and less than the upper limit (or less than the upper limit), the effect of the present invention can be more effectively exerted.

[0211] When the second resin layer contains a colorant, the content of the colorant in 100% by weight of the second resin layer is preferably 0.00001% by weight or more, more preferably 0.0001% by weight or more, and further preferably 0.001% by weight or more, and is preferably less than 0.015% by weight, and more preferably less than 0.01% by weight. When the content of the colorant is greater than the lower limit and less than the upper limit (or less than the upper limit), the effect of the present invention can be more effectively exerted.

[0212] The content (weight %) of the colorant in 100 weight % of the first resin layer and the content (weight %) of the colorant in 100 weight % of the second resin layer are preferably different.

[0213] <Metal Salt>

[0214] The first resin layer or the second resin layer preferably contains at least one metal salt selected from alkali metal salts and alkaline earth metal salts (hereinafter sometimes referred to as metal salt M). The first resin layer preferably contains the metal salt M. The second resin layer preferably contains the metal salt M. It should be noted that alkaline earth metals refer to six metals, namely Be, Mg, Ca, Sr, Ba and Ra. By using the metal salt M, it becomes easy to control the adhesion between the dimming body and the laminated glass component or the adhesion between the layers in the dimming body. The metal salt M may be used alone or in combination of two or more.

[0215] The metal salt M preferably includes at least one metal selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, and Ba. The metal salt M included in the dimming element preferably includes at least one metal selected from the group consisting of K and Mg.

[0216] In addition, alkali metal salts of organic acids having 2 to 16 carbon atoms and alkaline earth metal salts of organic acids having 2 to 16 carbon atoms can be used as the metal salt M. The metal salt M may include a magnesium salt of a carboxylate having 2 to 16 carbon atoms or a potassium salt of a carboxylate having 2 to 16 carbon atoms.

[0217] Examples of the magnesium salt of carboxylic acid having 2 to 16 carbon atoms and the potassium salt of carboxylic acid having 2 to 16 carbon atoms include magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, magnesium 2-ethylbutyrate, potassium 2-ethylbutyrate, magnesium 2-ethylhexanoate, and potassium 2-ethylhexanoate.

[0218] The total content of Mg and K in the layer (first resin layer or second resin layer) containing the metal salt M is preferably 5 ppm or more, more preferably 10 ppm or more, and further preferably 20 ppm or more, and is preferably 300 ppm or less, more preferably 250 ppm or less, and further preferably 200 ppm or less. When the total content of Mg and K is above the lower limit and below the upper limit, the adhesion between the light-adjusting body and the laminated glass component or the adhesion between the layers in the light-adjusting body can be further well controlled.

[0219] <UV shielding agent>

[0220] The first resin layer or the second resin layer preferably contains an ultraviolet shielding agent. The first resin layer preferably contains an ultraviolet shielding agent. The second resin layer preferably contains an ultraviolet shielding agent. By using the ultraviolet shielding agent, it is not easy to further reduce the visible light transmittance even if the dimming body and the laminated glass are used for a long time. The ultraviolet shielding agent can be used alone or in combination of two or more.

[0221] The ultraviolet shielding agent contains an ultraviolet absorber. The ultraviolet shielding agent is preferably an ultraviolet absorber.

[0222] As the ultraviolet shielding agent, for example, there can be mentioned an ultraviolet shielding agent containing a metal atom, an ultraviolet shielding agent containing a metal oxide, an ultraviolet shielding agent having a benzotriazole structure (benzotriazole compound), an ultraviolet shielding agent having a benzophenone structure (benzophenone compound), an ultraviolet shielding agent having a triazine structure (triazine compound), an ultraviolet shielding agent having a malonic ester structure (malonic ester compound), an ultraviolet shielding agent having an oxalylanilide structure (oxalylanilide compound), and an ultraviolet shielding agent having a benzoate structure (benzoate compound), etc.

[0223] Examples of the ultraviolet shielding agent containing a metal atom include platinum particles, particles obtained by coating the surface of platinum particles with silicon dioxide, palladium particles, and particles obtained by coating the surface of palladium particles with silicon dioxide, etc. The ultraviolet shielding agent is preferably not a heat shielding particle.

[0224] The ultraviolet shielding agent is preferably an ultraviolet shielding agent with a benzotriazole structure, an ultraviolet shielding agent with a benzophenone structure, an ultraviolet shielding agent with a triazine structure, or an ultraviolet shielding agent with a benzoate structure. The ultraviolet shielding agent is more preferably an ultraviolet shielding agent with a benzotriazole structure or an ultraviolet shielding agent with a benzophenone structure, and is further preferably an ultraviolet shielding agent with a benzotriazole structure.

[0225] As the ultraviolet shielding agent comprising metal oxide, for example, zinc oxide, titanium oxide and cerium oxide etc. can be enumerated. In addition, for the ultraviolet shielding agent comprising metal oxide, the surface can be coated. As the coating material on the surface of the ultraviolet shielding agent comprising metal oxide, insulating metal oxide, hydrolyzable organosilicon compound and polysiloxane compound etc. can be enumerated.

[0226] Examples of the insulating metal oxide include silicon dioxide, aluminum oxide, and zirconium oxide. The insulating metal oxide has a band gap energy of, for example, 5.0 eV or more.

[0227] As the ultraviolet shielding agent having a benzotriazole structure, for example, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole ("Tinuvin P" manufactured by BASF), 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole ("Tinuvin 320" manufactured by BASF), 2-(2'-hydroxy-3'-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole ("Tinuvin 326" manufactured by BASF), and 2-(2'-hydroxy-3',5'-di-pentylphenyl)benzotriazole ("Tinuvin 328" manufactured by BASF), etc., can be cited. Due to the excellent performance of shielding ultraviolet rays, the ultraviolet shielding agent is preferably an ultraviolet shielding agent having a benzotriazole structure containing a halogen atom, and more preferably an ultraviolet shielding agent having a benzotriazole structure containing a chlorine atom.

[0228] Examples of the ultraviolet shielding agent having a benzophenone structure include OCTABENZ ONE ("Chimassorb 81" manufactured by BASF Corporation).

[0229] Examples of the ultraviolet shielding agent having a triazine structure include "LA-F70" manufactured by ADEKA Corporation and 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-[(hexyl)oxy]-phenol ("Tinuvin 1577FF" manufactured by BASF Corporation).

[0230] Examples of the ultraviolet shielding agent having a malonate structure include dimethyl 2-(p-methoxybenzylidene)malonate, tetraethyl-2,2-(1,4-phenylenedimethylene)bismalonate, and 2-(p-methoxybenzylidene)-bis(1,2,2,6,6-pentamethyl-4-piperidinyl)malonate.

[0231] Examples of commercially available products of the ultraviolet shielding agent having a malonic acid ester structure include Hostavin B-CAP, Hostavin PR-25, and Hostavin PR-31 (all manufactured by CLARIANT).

[0232] Examples of the ultraviolet shielding agent having an oxalic acid anilide structure include oxalic acid diamides having an aromatic group substituted on a nitrogen atom, such as N-(2-ethylphenyl)-N'-(2-ethoxy-5-tert-butylphenyl) oxalic acid diamide, N-(2-ethylphenyl)-N'-(2-ethoxy-phenyl) oxalic acid diamide, and 2-ethyl-2'-ethoxy-oxalic acid anilide ("Sanduvor VSU" manufactured by CLARIANT).

[0233] Examples of the ultraviolet shielding agent having a benzoate structure include 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate ("Tinuvin 120" manufactured by BASF Corporation).

[0234] In the layer (the first resin layer or the second resin layer) comprising the ultraviolet shielding agent 100% by weight, the content of the ultraviolet shielding agent is preferably 0.1% by weight or more, more preferably 0.2% by weight or more, further preferably 0.3% by weight or more, particularly preferably 0.5% by weight or more, and preferably 2.5% by weight or less, more preferably 2% by weight or less, further preferably 1% by weight or less, particularly preferably 0.8% by weight or less. In particular, by comprising the layer 100% by weight of the ultraviolet shielding agent, the content of the ultraviolet shielding agent is 0.2% by weight or more, and the reduction of the visible light transmittance after the period of the dimming body and the laminated glass can be significantly suppressed.

[0235] <Antioxidants>

[0236] The first resin layer or the second resin layer preferably contains an antioxidant. The first resin layer preferably contains an antioxidant. The second resin layer preferably contains an antioxidant. The antioxidant may be used alone or in combination of two or more.

[0237] As the antioxidant, there can be mentioned phenolic antioxidants, sulfur antioxidants and phosphorus antioxidants. The phenolic antioxidant is an antioxidant having a phenol skeleton. The sulfur antioxidant is an antioxidant containing a sulfur atom. The phosphorus antioxidant is an antioxidant containing a phosphorus atom.

[0238] The antioxidant is preferably a phenolic antioxidant or a phosphorus antioxidant.

[0239] Examples of the phenolic antioxidant include 2,6-di-tert-butyl-p-cresol (BHT), butylated hydroxyanisole (BHA), 2,6-di-tert-butyl-4-ethylphenol, stearyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 2,2'-methylenebis-(4-methyl-6-butylphenol), 2,2'-methylenebis-(4-ethyl-6-tert-butylphenol), 4,4'-butylene-bis-(3-methyl-6-tert-butylphenol), 1,1,3- Tris-(2-methyl-hydroxy-5-tert-butylphenyl)butane, tetrakis[methylene-3-(3',5'-butyl-4-hydroxyphenyl)propionate]methane, 1,3,3-tris-(2-methyl-4-hydroxy-5-tert-butylphenol)butane, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, bis(3,3'-tert-butylphenol)butyric acid diol ester and bis(3-tert-butyl-4-hydroxy-5-methylphenylpropionic acid)ethylenebis(oxyethylene), etc. One or more of these antioxidants are preferably used.

[0240] As the phosphorus antioxidant, there can be mentioned tridecyl phosphite, tri(tridecyl) phosphite, triphenyl phosphite, trinonylphenyl phosphite, bis(tridecyl) pentaerythritol diphosphite, bis(decyl) pentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl) phosphite, bis(2,4-di-tert-butyl-6-methylphenyl) ethyl phosphite and 2,2'-methylenebis(4,6-di-tert-butyl-1-phenoxy)(2-ethylhexyloxy)phosphite, etc. One or more of these antioxidants can be suitably used.

[0241] Examples of commercially available antioxidants include "IRGANOX 245" manufactured by BASF, "IRGAFOS 168" manufactured by BASF, "IRGAFOS 38" manufactured by BASF, "SUMILIZER BHT" manufactured by Sumitomo Chemical Industries, Ltd., "H-BHT" manufactured by Sakai Chemical Industry, and "IRGANOX 1010" manufactured by BASF.

[0242] The content of the antioxidant in 100% by weight of the layer (the first resin layer or the second resin layer) containing the antioxidant is preferably 0.03% by weight or more, and more preferably 0.1% by weight or more. When the content of the antioxidant is above the lower limit, a high visible light transmittance of the dimming body and the laminated glass can be maintained for a long time. In addition, since the effect of adding the antioxidant is saturated, the content of the antioxidant in 100% by weight of the layer (the first resin layer or the second resin layer) containing the antioxidant is preferably 2% by weight or less.

[0243] <Other ingredients>

[0244] The first resin layer and the second resin layer may contain additives such as heat shielding particles, light stabilizers, coupling agents, dispersants, surfactants, flame retardants, antistatic agents, adhesion regulators other than metal salts, moisture resistance agents, fluorescent brighteners, and infrared absorbers as needed. These additives may be used alone or in combination of two or more.

[0245] Examples of the heat-insulating particles include aluminum-doped tin oxide particles, indium-doped tin oxide particles, antimony-doped tin oxide particles (ATO particles), gallium-doped zinc oxide particles (GZO particles), indium-doped zinc oxide particles (IZO particles), aluminum-doped zinc oxide particles (AZO particles), niobium-doped titanium oxide particles, sodium-doped tungsten oxide particles, cesium-doped tungsten oxide particles, thallium-doped tungsten oxide particles, rubidium-doped tungsten oxide particles, tin-doped indium oxide particles (ITO particles), tin-doped zinc oxide particles, silicon-doped zinc oxide particles, and other metal oxide particles, lanthanum hexaboride (LaB 6 ) particles, etc.

[0246] The average particle size of the heat shielding particles is preferably 0.01 μm or more, more preferably 0.02 μm or more, and preferably 0.1 μm or less, more preferably 0.05 μm or less. When the average particle size is above the lower limit, the heat shielding property becomes sufficiently high. When the average particle size is below the upper limit, the dispersibility of the heat shielding particles becomes higher.

[0247] The “average particle size” refers to a volume average particle size. The average particle size can be measured using a particle size distribution analyzer (“UPA-EX150” manufactured by Nikkiso Co., Ltd.) or the like.

[0248] <Other details of the first and second resin layers>

[0249] The average thickness of the first resin layer and the average thickness of the second resin layer may be the same or different. The average thickness of the first resin layer may be larger or smaller than the average thickness of the second resin layer.

[0250] The average thickness of the first resin layer is preferably 50 μm or more, more preferably 100 μm or more, further preferably 200 μm or more, further preferably 300 μm or more, particularly preferably 380 μm or more, and preferably 1000 μm or less, more preferably 900 μm or less, further preferably 800 μm or less, particularly preferably 760 μm or less. When the average thickness of the first resin layer is above the lower limit, the penetration resistance of the obtained laminated glass can be improved. When the average thickness of the first resin layer is below the upper limit, the transparency of the obtained laminated glass can be improved.

[0251] The average thickness of the second resin layer is preferably 50 μm or more, more preferably 100 μm or more, further preferably 200 μm or more, further preferably 300 μm or more, particularly preferably 380 μm or more, and preferably 1000 μm or less, more preferably 900 μm or less, further preferably 800 μm or less, particularly preferably 760 μm or less. When the average thickness of the second resin layer is above the lower limit, the penetration resistance of the obtained laminated glass can be improved. When the average thickness of the second resin layer is below the upper limit, the transparency of the obtained laminated glass can be improved.

[0252] (Other details of the dimmer)

[0253] The dimming body includes a first resin layer, a dimming layer, and a second resin layer. The dimming body may or may not include other layers besides these three layers. In the dimming body, the first resin layer is preferably in contact with the dimming layer, and the second resin layer is preferably in contact with the dimming layer.

[0254] The first resin layer is preferably a surface layer (first surface layer) of a light modulator. The second resin layer is preferably a surface layer (second surface layer) of a light modulator. The light modulator preferably has a three-layer structure of the first resin layer, the light modulator layer, and the second resin layer.

[0255] The dimming body is preferably a dimming film.

[0256] The dimming body has one end and another end on the opposite side of the one end. The one end and the other end refer to the ends of the dimming body on both sides facing each other.

[0257] The distance between one end and the other end of the dimming body is preferably greater than 0.5 m, more preferably greater than 0.8 m, particularly preferably greater than 1.0 m, and is preferably less than 3.0 m, more preferably less than 2.0 m, particularly preferably less than 1.5 m.

[0258] The maximum thickness of the dimming body is preferably greater than 0.1 mm, more preferably greater than 0.25 mm, further preferably greater than 0.5 mm, particularly preferably greater than 0.8 mm, and preferably less than 3.8 mm, more preferably less than 2.0 mm, further preferably less than 1.5 mm.

[0259] The method for producing the light-adjusting body is not particularly limited, and examples thereof include a method of thermally pressing a laminated body obtained by laminating the first resin layer, the light-adjusting layer, and the second resin layer.

[0260] From the perspective of excellent manufacturing efficiency of the light modulator, the first resin layer and the second resin layer preferably contain the same polyvinyl acetal resin. From the perspective of excellent manufacturing efficiency of the light modulator, the first resin layer and the second resin layer more preferably contain the same polyvinyl acetal resin and the same plasticizer.

[0261] (Laminated glass (switching glass))

[0262] The laminated glass of the present invention comprises a first laminated glass component, a second laminated glass component, and the light control element. In the laminated glass of the present invention, the light control element is disposed between the first laminated glass component and the second laminated glass component.

[0263] Figure 2 It is a schematic representation of the use of Figure 1 A cross-sectional view showing an example of a light-adjusting body for laminated glass.

[0264] Figure 2 The laminated glass 31 shown includes a first laminated glass member 21, a second laminated glass member 22, and a light control body 11. The light control body 11 is disposed between the first laminated glass member 21 and the second laminated glass member 22 and is sandwiched therebetween.

[0265] The first laminated glass component 21 is laminated on the first surface of the light-adjusting body 11. The second laminated glass component 22 is laminated on the second surface opposite to the first surface of the light-adjusting body 11. The first laminated glass component 21 is laminated on the outer surface of the first resin layer 1. The second laminated glass component 22 is laminated on the outer surface of the second resin layer 2.

[0266] The first laminated glass component is preferably a first glass plate. The second laminated glass component is preferably a second glass plate.

[0267] As the first and second laminated glass components, glass plates and PET (polyethylene terephthalate) films can be cited. The laminated glass includes not only laminated glass with a dimming body sandwiched between two glass plates, but also laminated glass with a dimming body sandwiched between a glass plate and a PET film. The laminated glass is a laminated body having glass plates, and preferably at least one glass plate is used. The first laminated glass component and the second laminated glass component are respectively glass plates or PET films, and the laminated glass preferably includes a glass plate as at least one of the first laminated glass component and the second laminated glass component. It is particularly preferred that both the first and second laminated glass components are glass plates.

[0268] Examples of the glass plate include inorganic glass and organic glass. Examples of the inorganic glass include float plate glass, heat absorbing plate glass, heat reflecting plate glass, polished plate glass, embossed plate glass, wired plate glass, and green glass. The organic glass is a synthetic resin glass that replaces inorganic glass. Examples of the organic glass include polycarbonate plates and poly (meth) acrylic resin plates. Examples of the poly (meth) acrylic resin plates include poly (methyl) acrylate plates.

[0269] The first laminated glass component and the second laminated glass component may be heat absorbing plate glass, heat reflecting plate glass or green glass, respectively. In these cases, heat absorbing plate glass, heat reflecting plate glass or green glass may be used. The first laminated glass component and the second laminated glass component may be transparent glass, respectively. The first laminated glass component and the second laminated glass component may be the same or different.

[0270] The thickness of each of the first laminated glass component and the second laminated glass component is preferably 1 mm or more, and preferably 5 mm or less, and more preferably 3 mm or less. In addition, when the laminated glass component is a glass plate, the thickness of the glass plate is preferably 0.5 mm or more, and more preferably 0.7 mm or more, and preferably 5 mm or less, and more preferably 3 mm or less. When the laminated glass component is a PET film, the thickness of the PET film is preferably 0.03 mm or more, and preferably 0.5 mm or less.

[0271] In the present invention, for the laminated glass, it is preferred to measure the visible light transmission color L * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C *In addition, in the present invention, it is preferred to measure the visible light reflection color L of the laminated glass. * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C * These color coordinates and chromaticity C * The measurement was performed in the same manner as the above method except that the laminated glass itself was used as the measurement sample (laminated glass for measurement).

[0272] <Color coordinates of visible light transmission color a * 、Color coordinate b * 、Color coordinates L * and chroma C * >

[0273] The visible light transmission color L of the laminated glass when voltage is applied * a * b * Color coordinate a in the color system * It is preferably -15 or more, more preferably -10 or more, and further preferably -5 or more, and is preferably 15 or less, more preferably 10 or less, and further preferably 5 or less. The color coordinate a * When the value is greater than the lower limit and less than the upper limit, the laminated glass can be made achromatic or nearly achromatic when a voltage is applied.

[0274] The visible light transmission color L of the laminated glass when voltage is applied * a * b * Color coordinate b in the color system * It is preferably -15 or more, more preferably -10 or more, and further preferably -5 or more, and is preferably 15 or less, more preferably 10 or less, and further preferably 5 or less. The color coordinate b * When the value is greater than the lower limit and less than the upper limit, the laminated glass can be made achromatic or nearly achromatic when a voltage is applied.

[0275] The visible light transmission color L of the laminated glass when voltage is applied * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 8 or more, further preferably 10 or more, and preferably 80 or less, more preferably 70 or less, further preferably 60 or less, further preferably 50 or less, further preferably 40 or less, particularly preferably 30 or less, and most preferably 25 or less. The color coordinate L *When the value is greater than the lower limit and less than the upper limit, the laminated glass can be made achromatic or nearly achromatic when a voltage is applied.

[0276] The visible light transmission color L of the laminated glass when voltage is applied * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 1, and preferably less than 25, more preferably less than 15, further preferably less than 10, particularly preferably less than 8, and most preferably less than 5. The chroma C * When the value is equal to or greater than the lower limit (or exceeds the lower limit) and equal to or less than the upper limit, the laminated glass can be made achromatic or nearly achromatic when a voltage is applied.

[0277] It should be noted that the L for measuring the visible light transmission color of the laminated glass when a voltage is applied is * a * b * Color coordinate a in the color system * 、Color coordinate b * 、Color coordinates L * and chroma C * The applied voltage is preferably within a range of 5V to 100V. The applied voltage is, for example, 30V.

[0278] <Color coordinates of visible light reflection color a * 、Color coordinate b * 、Color coordinates L * and chroma C * >

[0279] The visible light reflection color L of the laminated glass when measured from the first laminated glass component side when no voltage is applied is: * a * b * Color coordinate a in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate a * When the value is not less than the lower limit and not more than the upper limit, the color of the laminated glass can be made good when viewed from the first laminated glass member when no voltage is applied.

[0280] The visible light reflection color L of the laminated glass when measured from the first laminated glass component side when no voltage is applied is: * a * b *Color coordinate b in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the laminated glass can be made good when viewed from the first laminated glass member when no voltage is applied.

[0281] The visible light reflection color L of the laminated glass when measured from the first laminated glass component side when no voltage is applied is: * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 10 or more, further preferably 20 or more, and preferably 60 or less, more preferably 50 or less, further preferably 40 or less, and particularly preferably 30 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit, the color of the laminated glass can be made good when viewed from the first laminated glass member when no voltage is applied.

[0282] The visible light reflection color L of the laminated glass when measured from the first laminated glass component side when no voltage is applied is: * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 0.2, and preferably less than 30, more preferably less than 20, further preferably less than 10, particularly preferably less than 5, and most preferably less than 3. * When the value is not less than the lower limit (or exceeds the lower limit) and not more than the upper limit, the color of the laminated glass can be made good when viewed from the first laminated glass member when no voltage is applied.

[0283] The visible light reflection color L of the laminated glass when measured from the second laminated glass component side when no voltage is applied is: * a * b * Color coordinate a in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate a *When the value is not less than the lower limit and not more than the upper limit, the color of the laminated glass can be made good when viewed from the second laminated glass member when no voltage is applied.

[0284] The visible light reflection color L of the laminated glass when measured from the second laminated glass component side when no voltage is applied is: * a * b * Color coordinate b in the color system * It is preferably -20 or more, more preferably -15 or more, further preferably -10 or more, particularly preferably -5 or more, and most preferably -3 or more, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, particularly preferably 5 or less, and most preferably 3 or less. The color coordinate b * When the value is not less than the lower limit and not more than the upper limit, the color of the laminated glass can be made good when viewed from the second laminated glass member when no voltage is applied.

[0285] The visible light reflection color L of the laminated glass when measured from the second laminated glass component side when no voltage is applied is: * a * b * Color coordinate L in color system * It is preferably 5 or more, more preferably 10 or more, further preferably 20 or more, particularly preferably 30 or more, most preferably 35 or more, and preferably 60 or less, more preferably 50 or less, further preferably 40 or less. The color coordinate L * When the value is not less than the lower limit and not more than the upper limit, the color of the laminated glass can be made good when viewed from the second laminated glass member when no voltage is applied.

[0286] The visible light reflection color L of the laminated glass when measured from the second laminated glass component side when no voltage is applied is: * a * b * Chroma C in the color system * It is preferably greater than 0, more preferably greater than 0.5, and preferably less than 30, more preferably less than 20, further preferably less than 10, and particularly preferably less than 5. The chroma C * When the value is not less than the lower limit (or exceeds the lower limit) and not more than the upper limit, the color of the laminated glass can be made good when viewed from the second laminated glass member when no voltage is applied.

[0287] The visible light reflection color of the laminated glass when measured from the first laminated glass component side when no voltage is applied and the visible light reflection color of the laminated glass when measured from the second laminated glass component side when no voltage is applied are L * a *b * The color difference in the colorimetric system is preferably greater than 0, more preferably greater than 0.5, further preferably greater than 5, particularly preferably greater than 10, and is preferably less than 50, more preferably less than 40, further preferably less than 30, and particularly preferably less than 20. When the color difference is greater than (or exceeds) the lower limit and less than the upper limit, when no voltage is applied, the color difference between when observed from the first laminated glass component side and when observed from the second laminated glass component side increases, so the design of the laminated glass can be improved.

[0288] The manufacturing method of the laminated glass is not particularly limited. First, a laminate is obtained by sandwiching a dimming body between the first laminated glass component and the second laminated glass component. Next, for example, the obtained laminate is decompressed and sucked by passing it through a pressing roller or placing it in a rubber bag, thereby degassing the air remaining between the first laminated glass component, the second laminated glass component and the dimming body. Then, pre-pressing is performed at about 70°C to 110°C to obtain a pre-pressed laminate. Next, the pre-pressed laminate is placed in an autoclave or pressed, and pressed at about 120°C to 150°C and a pressure of 1MPa to 1.5MPa. In this way, laminated glass can be obtained.

[0289] The dimming body and the laminated glass can be used in vehicles, railway vehicles, airplanes, ships, buildings, etc. The dimming body and the laminated glass can also be used for purposes other than these. The dimming body and the laminated glass can be used for purposes such as window glass, display windows, partitions, and wall glass. The partition can be a partitioning component that partitions between seats in a vehicle.

[0290] The dimming body and the laminated glass are preferably a dimming body and a laminated glass for vehicles or buildings, and more preferably a dimming body and a laminated glass for vehicles.

[0291] The dimming body and the laminated glass can be used for a windshield, side glass, rear glass, roof glass, or backlight glass of a vehicle. The dimming body and the laminated glass are suitable for use in a vehicle. The dimming body can be suitably used to obtain a laminated glass for a vehicle.

[0292] The vehicle comprises a vehicle body and a laminated glass as a window glass of the vehicle, and the laminated glass is preferably the above-mentioned laminated glass. Examples of the window glass include a windshield, a side glass, a rear glass, a roof glass, and a backlight glass. In the vehicle, the first laminated glass component and the second laminated glass component may be on the inside of the vehicle or on the outside of the vehicle. In the vehicle, the first resin layer and the second resin layer may be on the inside of the vehicle or on the outside of the vehicle.

[0293] The present invention will be described in further detail below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

[0294] In the polyvinyl acetal resin used, n-butyraldehyde having 4 carbon atoms can be used for acetalization. For the polyvinyl acetal resin, the degree of acetalization (degree of butyralization), the degree of acetylation and the content of hydroxyl groups were measured by a method based on JIS K6728 "Testing methods for polyvinyl butyral". It should be noted that when measured by ASTM D1396-92, the same numerical values ​​as those by the method based on JIS K6728 "Testing methods for polyvinyl butyral" are shown.

[0295] (Dimming layer)

[0296] As a PDLC dimming layer P

[0297] As an electrochromic dimming layer E

[0298] The following materials were prepared as materials for the first and second resin layers.

[0299] (Thermoplastic resin)

[0300] Polyvinyl acetal resin (polyvinyl butyral resin, average degree of polymerization 1700, hydroxyl content 30 mol%, acetylation degree 1 mol%, acetalization degree (butyralization degree) 69 mol%)

[0301] (Plasticizer)

[0302] 3GO: Triethylene glycol di-2-ethylhexanoate

[0303] (Colorant)

[0304] Phthalocyanine Pigment (PB15-1)

[0305] Perylene Pigment (PR149)

[0306] Phthalocyanine Pigments (PG7)

[0307] Carbon black (P.Bk.7)

[0308] (Metal Salt)

[0309] Mg mixture (50:50 (weight ratio) mixture of magnesium 2-ethylbutyrate and magnesium acetate)

[0310] (UV shielding agent)

[0311] Tinuvin 326: 2-(2'-hydroxy-3'-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole ("Tinuvin 326" manufactured by BASF)

[0312] (Antioxidant)

[0313] BHT: 2,6-di-tert-butyl-p-cresol

[0314] Using the materials, a resin composition was prepared in the following manner.

[0315] Preparation of resin composition A for forming resin layer:

[0316] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition A for forming a resin layer.

[0317] Polyvinyl acetal resin: 100 parts by weight

[0318] 3GO: 40 parts by weight

[0319] Phthalocyanine pigment (PB15-1): 0.016 wt% in the obtained resin layer

[0320] Perylene pigment (PR149): 0.002 wt% in the obtained resin layer

[0321] Phthalocyanine pigment (PG7): 0.002 wt% in the obtained resin layer

[0322] Carbon black (P.Bk.7): 0.030 wt% in the obtained resin layer

[0323] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0324] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0325] BHT: 0.2 wt% in the obtained resin layer

[0326] Preparation of resin composition B for forming resin layer:

[0327] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition B for forming a resin layer.

[0328] Polyvinyl acetal resin: 100 parts by weight

[0329] 3GO: 40 parts by weight

[0330] Phthalocyanine pigment (PB15-1): 0.018 wt% in the obtained resin layer

[0331] Perylene pigment (PR149): 0.006 wt% in the obtained resin layer

[0332] Phthalocyanine pigment (PG7): 0.010 wt% in the obtained resin layer

[0333] Carbon black (P.Bk.7): 0.028 wt% in the obtained resin layer

[0334] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0335] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0336] BHT: 0.2 wt% in the obtained resin layer

[0337] Preparation of resin composition C for forming resin layer:

[0338] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition C for forming a resin layer.

[0339] Polyvinyl acetal resin: 100 parts by weight

[0340] 3GO: 40 parts by weight

[0341] Phthalocyanine pigment (PG7): 0.048 wt% in the obtained resin layer

[0342] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0343] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0344] BHT: 0.2 wt% in the obtained resin layer

[0345] Preparation of resin composition D for forming resin layer:

[0346] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition D for forming a resin layer.

[0347] Polyvinyl acetal resin: 100 parts by weight

[0348] 3GO: 40 parts by weight

[0349] Phthalocyanine pigment (PB15-1): 0.005 wt% in the obtained resin layer

[0350] Perylene pigment (PR149): 0.004 wt% in the obtained resin layer

[0351] Carbon black (P.Bk.7): 0.011 wt% in the obtained resin layer

[0352] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0353] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0354] BHT: 0.2 wt% in the obtained resin layer

[0355] Preparation of resin composition E for forming resin layer:

[0356] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition E for forming a resin layer.

[0357] Polyvinyl acetal resin: 100 parts by weight

[0358] 3GO: 40 parts by weight

[0359] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0360] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0361] BHT: 0.2 wt% in the obtained resin layer

[0362] Preparation of resin composition F for forming resin layer:

[0363] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition F for forming a resin layer.

[0364] Polyvinyl acetal resin: 100 parts by weight

[0365] 3GO: 40 parts by weight

[0366] Carbon black (P.Bk.7): 0.031 wt% in the obtained resin layer

[0367] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0368] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0369] BHT: 0.2 wt% in the obtained resin layer

[0370] Preparation of resin composition G for forming resin layer:

[0371] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition G for forming a resin layer.

[0372] Polyvinyl acetal resin: 100 parts by weight

[0373] 3GO: 40 parts by weight

[0374] Perylene pigment (PR149): 0.016 wt% in the obtained resin layer

[0375] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0376] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0377] BHT: 0.2 wt% in the obtained resin layer

[0378] Preparation of resin composition H for forming resin layer:

[0379] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition H for forming a resin layer.

[0380] Polyvinyl acetal resin: 100 parts by weight

[0381] 3GO: 40 parts by weight

[0382] Phthalocyanine pigment (PB15-1): 0.0165 wt% in the obtained resin layer

[0383] Perylene pigment (PR149): 0.023 wt% in the obtained resin layer

[0384] Phthalocyanine pigment (PG7): 0.0016 wt% in the obtained resin layer

[0385] Carbon black (P.Bk.7): 0.0309 wt% in the obtained resin layer

[0386] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0387] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0388] BHT: 0.2 wt% in the obtained resin layer

[0389] Preparation of resin composition I for forming resin layer:

[0390] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition I for forming a resin layer.

[0391] Polyvinyl acetal resin: 100 parts by weight

[0392] 3GO: 40 parts by weight

[0393] Phthalocyanine pigment (PB15-1): 0.0143 wt% in the obtained resin layer

[0394] Perylene pigment (PR149): 0.0068 wt% in the obtained resin layer

[0395] Carbon black (P.Bk.7): 0.0063 wt% in the obtained resin layer

[0396] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0397] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0398] BHT: 0.2 wt% in the obtained resin layer

[0399] Preparation of resin composition J for forming resin layer:

[0400] The following components were prepared and fully kneaded using a mixing roll to obtain a resin composition J for forming a resin layer.

[0401] Polyvinyl acetal resin: 100 parts by weight

[0402] 3GO: 40 parts by weight

[0403] Carbon black (P.Bk.7): 0.0162 wt% in the obtained resin layer

[0404] Mg mixture: The amount of magnesium in the obtained resin layer is 70 ppm

[0405] Tinuvin 326: 0.2 wt% in the obtained resin layer

[0406] BHT: 0.2 wt% in the obtained resin layer

[0407] The following parts were prepared as laminated glass parts.

[0408] Clear glass A (thickness 2.5 mm, based on JIS R3202:1996)

[0409] (Example 1)

[0410] Preparation of dimming body:

[0411] The first resin layer was obtained by extruding the resin composition A through an extruder. In addition, the second resin layer was obtained by extruding the resin composition F through an extruder. The first resin layer, the dimming layer P and the second resin layer were stacked in sequence to prepare a dimming body having a three-layer structure (first resin layer (thickness 380 μm) / dimming layer P / second resin layer (thickness 380 μm)).

[0412] Preparation of laminated glass:

[0413] The obtained dimming body was sandwiched between two sheets of transparent glass A (300 mm in length × 300 mm in width) to obtain a laminate. The obtained laminate was placed in a rubber bag and degassed at a vacuum degree of 2.6 kPa for 20 minutes. After degassed, it was directly moved to an oven and further vacuum pressed at 90°C for 30 minutes to pre-press the laminate. The pre-pressed laminate was pressed for 20 minutes at 135°C and a pressure of 1.2 MPa in an autoclave to obtain a laminated glass.

[0414] (Examples 2 to 8 and Comparative Examples 1 to 4)

[0415] The types of resin compositions and light-adjusting layers used to form the first and second resin layers were changed as shown in the table below. In addition, the thicknesses of the first and second resin layers were changed as shown in the table below. Except for these, the light-adjusting body and laminated glass were prepared in the same manner as in Example 1.

[0416] (evaluate)

[0417] (1) Color coordinates of the first and second resin layers, the dimming layer, and the dimming body

[0418] According to the above method, the following color coordinates were measured.

[0419] 1) The visible light transmission color L of the first resin layer * a * b * Color coordinate L in color system * 、Color coordinate a * 、Color coordinate b * and chroma C *

[0420] 2) L of the visible light reflection color of the first resin layer * a * b * Color coordinate L in color system * 、Color coordinate a * and color coordinate b *

[0421] 3) The visible light transmission color L of the light-adjusting layer when no voltage is applied * a * b * Color coordinate L in color system * 、Color coordinate a * and color coordinate b *

[0422] 4) The visible light reflection color L of the dimming layer when no voltage is applied * a * b * Color coordinate L in color system * 、Color coordinate a * and color coordinate b *

[0423] 5) The visible light transmission color L of the second resin layer * a * b * Color coordinate L in color system * 、Color coordinate a * 、Color coordinate b * and chroma C *

[0424] 6) L of the visible light reflection color of the second resin layer * a * b * Color coordinate L in color system * 、Color coordinate a * and color coordinate b *

[0425] 7) When no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side * a * b * Color coordinate L in color system * 、Color coordinate a * 、Color coordinate b * and chroma C *

[0426] 8) When no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side * a * b * Color coordinate L in color system * 、Color coordinate a * 、Color coordinate b * and chroma C *

[0427] 9) The visible light transmission color L of the dimming body when voltage is applied (when voltage is 30V) * a *b * Color coordinate L in color system * 、Color coordinate a * 、Color coordinate b * and chroma C *

[0428] Furthermore, the following calculations were performed based on the results obtained from the measurements.

[0429] 1) The visible light transmission color of the first resin layer and the visible light transmission color of the second resin layer L * a * b * Color Difference in Color Representation System

[0430] 2) The visible light reflection color of the first resin layer and the visible light reflection color of the second resin layer L * a * b * Color Difference in Color Representation System

[0431] 3) The visible light transmission color of the first resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied * a * b * Color Difference in Color Representation System

[0432] 4) The visible light transmission color of the second resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied * a * b * Color Difference in Color Representation System

[0433] 5) The value X obtained by the above formula (X)

[0434] 6) The value Y obtained by the above formula (Y)

[0435] 7) The visible light reflection color of the light modulator when measured from the first resin layer side when no voltage is applied and the visible light reflection color of the light modulator when measured from the second resin layer side when no voltage is applied * a * b * Color Difference in Color Representation System

[0436] (2) Visible light transmittance (Tv)

[0437] According to the above method, the following visible light transmittance was measured.

[0438] 1) Visible light transmittance of the first resin layer

[0439] 2) Visible light transmittance of the second resin layer

[0440] 3) Visible light transmittance of the dimming body when voltage is applied (when voltage is 30V)

[0441] (3) Visible light spectrum

[0442] According to the method, the visible light spectra of the first resin layer and the second resin layer at wavelengths of 380nm to 780nm were measured. Based on the obtained visible light spectra, the main visible light wavelengths of the first resin layer and the second resin layer were respectively obtained. It should be noted that in the table, the main visible light wavelength of "-" means that the resin layer does not have a main visible light wavelength.

[0443] In addition, based on the main wavelengths of visible light of the first resin layer and the second resin layer, the ratio of the peak height of the main wavelength of visible light of the second resin layer to the peak height of the main wavelength of visible light of the first resin layer (peak height of the main wavelength of visible light of the second resin layer / peak height of the main wavelength of visible light of the first resin layer) is calculated.

[0444] The compositions of the light-adjusting body and the laminated glass and the results are shown in Tables 1 to 9 below.

[0445] [Table 1]

[0446]

[0447] [Table 2]

[0448]

[0449] [Table 3]

[0450]

[0451] [Table 4]

[0452]

[0453] [Table 5]

[0454]

[0455] [Table 6]

[0456]

[0457] [Table 7]

[0458]

[0459] [Table 8]

[0460]

[0461] [Table 9]

[0462]

[0463] Explanation of symbols

[0464] 1…1st resin layer

[0465] 2…Second resin layer

[0466] 3…Dimming layer

[0467] 3a…1st surface

[0468] 3b…2nd surface

[0469] 11…Dimming body

[0470] 21…1st laminated glass component

[0471] 22…Second laminated glass component

[0472] 31…Laminated glass

Claims

1. A light modulator comprising a first resin layer, a light modulating layer and a second resin layer in this order, The color of the first resin layer is different from the color of the second resin layer.

2. The light modulator according to claim 1, wherein: The visible light transmission color of the first resin layer and the visible light transmission color of the second resin layer are L * a * b * The color difference in the color system is greater than 0 and less than 100.

3. The light modulator according to claim 1 or 2, wherein: The absolute value of the value X obtained by the following formula (X) is 5 or more and 100 or less, Value X = AB (X) A: The visible light transmission color of the first resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied. * a * b * Color Difference in Color Representation System B: The visible light transmission color of the second resin layer and the visible light transmission color of the light-adjusting layer when no voltage is applied. * a * b * Color difference in color representation system.

4. The light modulating body according to any one of claims 1 to 3, wherein: The visible light transmission color L of the first resin layer * a * b * Chroma C in the color system * Below 50, The visible light transmission color L of the second resin layer * a * b * Chroma C in the color system * Below 70, The visible light transmittance of the second resin layer is lower than 100%.

5. The light modulator according to any one of claims 1 to 4, wherein: When the visible light spectrum of the first resin layer at a wavelength of 380 nm to 780 nm is obtained, the main wavelength of visible light of the first resin layer exists in a wavelength range of 580 nm to less than 780 nm.

6. The light modulator according to any one of claims 1 to 5, wherein: When the visible light spectrum of the second resin layer at a wavelength of 380 nm to 780 nm is obtained, the main wavelength of visible light of the second resin layer exists in a wavelength range of 380 nm or more and less than 650 nm.

7. The light modulating body according to any one of claims 1 to 6, wherein: When the visible light spectrum of the first resin layer at a wavelength of 380nm to 780nm and the visible light spectrum of the second resin layer at a wavelength of 380nm to 780nm are obtained respectively, the ratio of the peak height of the main wavelength of visible light of the second resin layer to the peak height of the main wavelength of visible light of the first resin layer is greater than 0 and is less than 5.

8. The light modulator according to any one of claims 1 to 7, wherein: The first resin layer comprises a thermoplastic resin and a colorant, The second resin layer contains a thermoplastic resin and a colorant.

9. The light modulator according to any one of claims 1 to 8, wherein: The first resin layer has an average thickness of 50 μm or more and 1000 μm or less, The second resin layer has an average thickness of 50 μm or more and 1000 μm or less.

10. The light modulator according to any one of claims 1 to 9, wherein: When no voltage is applied, the visible light reflection color L of the light modulator measured from the first resin layer side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

11. The light modulator according to any one of claims 1 to 10, wherein: When no voltage is applied, the visible light reflection color L of the light modulator measured from the second resin layer side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

12. The light modulator according to any one of claims 1 to 11, wherein: The visible light transmission color L of the light modulator when voltage is applied * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

13. The light modulator according to any one of claims 1 to 12, wherein: The first resin layer and the second resin layer are a combination in a complementary color relationship.

14. The light modulating body according to any one of claims 1 to 13, wherein: The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The product of is negative.

15. The light modulator according to any one of claims 1 to 14, wherein: The visible light transmission color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate a in the color system * The sum of is less than 15.

16. The light modulator according to any one of claims 1 to 15, wherein: The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The product of is negative.

17. The light modulator according to any one of claims 1 to 16, wherein: The visible light transmission color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light transmission color L of the second resin layer * a * b * Color coordinate b in the color system * The sum of is less than 15.

18. The light modulator according to any one of claims 1 to 17, wherein: The visible light reflection color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The product of is negative.

19. The light modulator according to any one of claims 1 to 18, wherein: The visible light reflection color L of the first resin layer * a * b * Color coordinate a in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate a in the color system * The sum of is less than 10.

20. The light modulator according to any one of claims 1 to 19, wherein: The visible light reflection color L of the first resin layer * a * b * Color coordinate b in the color system * The visible light reflection color L of the second resin layer * a * b * Color coordinate b in the color system * The sum of is less than 10.

21. A laminated glass comprising: 1st laminated glass component, The second laminated glass component, and The light modulating body according to any one of claims 1 to 20, The light control element is disposed between the first laminated glass component and the second laminated glass component.

22. The laminated glass according to claim 21, wherein: When no voltage is applied, the visible light reflection color L of the laminated glass measured from the first laminated glass component side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

23. The laminated glass according to claim 21 or 22, wherein: When no voltage is applied, the visible light reflection color L of the laminated glass measured from the second laminated glass component side is * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

24. The laminated glass according to any one of claims 21 to 23, wherein: The visible light transmission color L of the laminated glass when voltage is applied * a * b * Color coordinate a in the color system * It is -20 or more and 20 or less.

25. A vehicle comprising: Vehicle body, and Laminated glass as vehicle window glass, The laminated glass is the laminated glass according to any one of claims 21 to 24.

Images