Interlayer film for laminated glass and laminated glass

Abstract

The present invention provides an interlayer film for laminated glass that can improve weather resistance. The interlayer film for laminated glass of the present invention contains an anthraquinone dye and a pyrone dye.

Description

Technical Field

[0001] The present invention relates to an interlayer film for laminated glass for obtaining laminated glass. In addition, the present invention relates to laminated glass using the interlayer film for laminated glass. Background Art

[0002] Even if laminated glass is broken by external impact, the amount of glass fragments scattered is small, and the safety is excellent. Therefore, the laminated glass is widely used in automobiles, railway vehicles, aircraft, ships, buildings, etc. The laminated glass is manufactured by sandwiching an intermediate film between a pair of glass plates.

[0003] In recent years, laminated glass for buildings and vehicles has been required to have design, light-shielding, privacy protection, etc. Laminated glass having design, light-shielding, privacy protection, etc. can be obtained using an interlayer film containing a colorant such as a dye or a pigment.

[0004] As an example of laminated glass with privacy protection, the following Patent Document 1 discloses a laminated glass using a multilayer interlayer film having an opaque layer. In this laminated glass, privacy protection is achieved by the opaque layer that prevents the naked eye from seeing a person or object behind the laminated glass. The opaque layer may contain, for example, an inorganic powder, or may contain a dye or a pigment.

[0005] Patent document 2 below discloses a laminated glass for a vehicle formed by bonding two glass plates to each other via an intermediate film. The intermediate film includes: a first region having a light reduction function that causes a transmittance loss to visible light; and a second region surrounded by the first region or a second region formed by partially retreating the end of the first region. In the second region, the intermediate film has a transmittance loss to visible light that is less than the transmittance loss. The first region may include, for example, a pigment or a dye. The first region may be a strip-shaped shadow region.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: WO2006 / 082800A1

[0009] Patent Document 2: WO2003 / 059837A1 Summary of the invention

[0010] Technical problem solved by the invention

[0011] Laminated glass using an interlayer film containing a dye or pigment as a colorant may have low weather resistance. Therefore, when laminated glass using an interlayer film containing a dye or pigment is exposed to sunlight for a long time, the color tone of the colored part may change.

[0012] An object of the present invention is to provide an interlayer film for laminated glass that can improve weather resistance. Another object of the present invention is to provide laminated glass using the interlayer film for laminated glass.

[0013] Technical means of solving problems

[0014] According to a broad aspect of the present invention, there is provided an interlayer film for laminated glass, comprising an anthraquinone dye and a pyrene dye (in this specification, the "interlayer film for laminated glass" may be simply referred to as the "interlayer film").

[0015] In a specific embodiment of the interlayer film of the present invention, the interlayer film contains a light stabilizer.

[0016] In a specific embodiment of the interlayer film of the present invention, the light stabilizer is a light stabilizer having a carbon atom bonded to a nitrogen atom of a piperidine structure.

[0017] In a specific embodiment of the intermediate film of the present invention, the intermediate film contains a thermoplastic resin.

[0018] In a specific embodiment of the intermediate film of the present invention, the intermediate film contains a plasticizer.

[0019] In a specific embodiment of the intermediate film of the present invention, the anthraquinone dye is a blue pigment.

[0020] In a specific embodiment of the intermediate film of the present invention, the pyrene dye is a red pigment.

[0021] In a specific embodiment of the interlayer film of the present invention, the interlayer film contains a yellow pigment as a colorant different from both the anthraquinone dye and the pyrene dye.

[0022] In a specific embodiment of the intermediate film of the present invention, the yellow pigment is an azo pigment or a quinoline dye.

[0023] In a specific embodiment of the intermediate film of the present invention, the intermediate film contains an azo pigment or a quinoline dye.

[0024] 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 interlayer film for laminated glass, wherein the interlayer film for laminated glass is arranged between the first laminated glass component and the second laminated glass component.

[0025] Effects of the Invention

[0026] The interlayer film for laminated glass of the present invention contains an anthraquinone dye and a pyrene dye, and thus can improve weather resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] [ Figure 1 ] Figure 1 It is a cross-sectional view schematically showing the interlayer film for laminated glass according to the first embodiment of the present invention.

[0028] [ Figure 2 ] Figure 2 It is a cross-sectional view schematically showing an interlayer film for laminated glass according to a second embodiment of the present invention.

[0029] [ Figure 3 ] Figure 3 It is a schematic representation of the use of Figure 1 FIG. 1 is a cross-sectional view showing an example of a laminated glass including an interlayer film for a laminated glass.

[0030] [ Figure 4 ] Figure 4 It is a schematic representation of the use of Figure 2 FIG. 1 is a cross-sectional view showing an example of a laminated glass including an interlayer film for a laminated glass.

[0031] Specific embodiments of the present invention

[0032] Hereinafter, the details of the present invention will be described.

[0033] (Interlayer film for laminated glass)

[0034] The interlayer film for laminated glass of the present invention (hereinafter, sometimes simply referred to as “interlayer film”) contains an anthraquinone dye and a pyrone dye.

[0035] Since the interlayer film of the present invention has the above-mentioned structure, weather resistance can be improved.

[0036] In order to obtain laminated glass with design, light-shielding or privacy protection, colorants such as dyes and pigments are used. However, in laminated glass using an interlayer film containing a dye or pigment as a colorant, the weather resistance is sometimes low. Therefore, when a laminated glass using an interlayer film containing a dye or pigment is exposed to sunlight for a long time, there is a case where the color tone of the colored part changes. In addition, in order to suppress the degradation of the resin, a light stabilizer is sometimes mixed into the interlayer film. However, in laminated glass using an interlayer film containing a dye or pigment and a light stabilizer, the weather resistance is easy to decrease, and the color tone of the colored part is more likely to change. In addition, in laminated glass using an interlayer film containing a dye or pigment as a blue pigment and a light stabilizer, the weather resistance is more likely to decrease, and the color tone of the colored part is more likely to change. It should be noted that when only a pigment is used as a colorant, the weather resistance of the laminated glass can be improved to a certain extent compared with the case where only a dye is used, but there is a tendency for the haze to be higher. Therefore, it is not preferred to use only a pigment as a colorant.

[0037] The present inventors have found that in an interlayer film containing a dye, the weather resistance can be improved. That is, the present inventors have found that, by combining at least two compounds having a specific structure as a colorant, and using a dye as the at least two compounds having a specific structure, the weather resistance can be greatly improved. In the interlayer film of the present invention, since an anthraquinone dye and a pyrene dye are used in combination, the weather resistance can be improved, and even if the laminated glass is exposed to sunlight for a long time, the discoloration of the colored part can be greatly suppressed. In addition, even if a light stabilizer is included in the interlayer film of the present invention, the discoloration of the colored part can be effectively suppressed.

[0038] Furthermore, in the case of the interlayer film of the present invention, the haze of the laminated glass can be suppressed to be low. Furthermore, in the case of the interlayer film of the present invention, bubbling at the edge of the laminated glass can be effectively suppressed.

[0039] The intermediate film has a structure of one layer or a structure of two or more layers. The intermediate film may have a structure of one layer or a structure of two or more layers. The intermediate film may have a structure of two layers, a structure of three layers, a structure of three or more layers, a structure of four or more layers, a structure of five or more layers, or a structure of six or more layers. The intermediate film may be an intermediate film having a structure of one layer (a single-layer intermediate film) having only the first layer, or an intermediate film having a structure of two or more layers (a multi-layer intermediate film) having the first layer and other layers. The intermediate film may have these structures in a part of the intermediate film, or in the entire intermediate film. The structure of the intermediate film may be partially different.

[0040] The intermediate film may have: a colored portion that is colored in the top view, and a non-colored portion that is not colored in the top view. The intermediate film may have a colored portion that is colored in the top view on one end side in the width direction, and a non-colored portion that is not colored in the top view on the other end side in the width direction opposite to the one end. In addition, among the colored portions, there may be a colored portion and an uncolored portion in the thickness direction of the intermediate film. In this case, the portion that is colored in the top view is a colored portion that includes a colored portion and an uncolored portion (for example, Figure 1 , 2 right side of the dotted line).

[0041] It should be noted that the interlayer film may have only colored portions that are colored in a plan view, and the interlayer film may not have non-colored portions that are not colored in a plan view.

[0042] The intermediate film preferably includes a plurality of layers at one end side in the width direction. The intermediate film preferably includes a plurality of layers at the colored portion. In this case, the intermediate film may include: a colored layer containing a colorant and a layer other than the colored layer at the colored portion.

[0043] Figure 1 It is a cross-sectional view schematically showing the interlayer film for laminated glass according to the first embodiment of the present invention.

[0044] Figure 1 The interlayer film 1 shown is used to obtain laminated glass. The interlayer film 1 is an interlayer film for laminated glass.

[0045] The intermediate film 1 includes a first layer 11, a second layer 12, and a third layer 13. The second layer 12 is provided on the first surface (one surface) side of the first layer 11. The second layer 12 is laminated on the first surface of the first layer 11. The first layer 11 is in contact with the second layer 12. The third layer 13 is provided on the second surface side of the first layer 11 opposite to the first surface. The third layer 13 is laminated on the second surface of the first layer 11. The first layer 11 is in contact with the third layer 13. The first layer 11 is provided and sandwiched between the second layer 12 and the third layer 13.

[0046] It should be noted that other layers may be provided between the first layer 11 and the second layer 12 and between the first layer 11 and the third layer 13. Preferably, the first layer 11 and the second layer 12 and the first layer 11 and the third layer 13 are directly laminated.

[0047] The intermediate film 1 has a longitudinal direction and a width direction. Figure 1 The left and right direction is the width direction.

[0048] The intermediate film 1 includes a coloring layer 14 containing a coloring agent. The coloring agent includes an anthraquinone dye and a pyrone dye. Therefore, the coloring layer 14 includes an anthraquinone dye and a pyrone dye. The coloring layer 14 is embedded in the second layer 12. The coloring layer 14 is embedded in the second layer 12 at one end of the intermediate film 1. The coloring layer 14 is embedded in the second layer 12 at one end of the intermediate film 1 in the width direction.

[0049] The interlayer film may have only one colored layer or may have a plurality of colored layers. The colored layer may be embedded in the first layer, disposed between the first layer and the second layer, disposed on the side of the second layer opposite to the first layer, embedded in the third layer, disposed between the first layer and the third layer, or disposed on the side of the third layer opposite to the first layer.

[0050] The interlayer film 1 has a colored portion X that is colored in a plan view in a portion having the colored layer 14. The interlayer film 1 has a non-colored portion Y that is not colored in a plan view in a portion not having the colored layer 14. Figure 1 The entire right side portion of the dotted line is referred to as the colored portion X. Figure 1 The entire left side portion of the dotted line is called the non-colored area Y.

[0051] The interlayer film 1 has a multilayer structure in which the second layer 12, the colored layer 14, the second layer 12, the first layer 11, and the third layer 13 are provided in this order at the colored portion X. The interlayer film 1 has a five-layer structure at the colored portion X.

[0052] The interlayer film 1 has a multilayer structure in which the second layer 12, the first layer 11, and the third layer 13 are provided in this order in the non-colored portion Y. The interlayer film 1 has a three-layer structure in the non-colored portion Y.

[0053] The outer surface of the second layer 12 opposite to the first layer 11 is preferably a surface on which a laminated glass member is laminated. The outer surface of the third layer 13 opposite to the first layer 11 is preferably a surface on which a laminated glass member is laminated.

[0054] Figure 2 It is a cross-sectional view schematically showing an interlayer film for laminated glass according to a second embodiment of the present invention.

[0055] Figure 2 The illustrated intermediate film 1A includes a first layer 11A.

[0056] The intermediate film 1A has a longitudinal direction and a width direction. Figure 2 The left and right direction is the width direction.

[0057] The intermediate film 1A includes a colored layer 14A containing a colorant. The colored layer 14A is embedded in the first layer 11A. The colorant contains an anthraquinone dye and a pyrone dye. Therefore, the colored layer 14A contains an anthraquinone dye and a pyrone dye. The colored layer 14A is embedded in the first layer 11A at one end of the intermediate film 1A. The colored layer 14A is embedded in the first layer 11A at one end in the width direction of the intermediate film 1A.

[0058] The interlayer film 1A has a colored portion X that is colored in a plan view in a portion having the colored layer 14A. The interlayer film 1A has a non-colored portion Y that is not colored in a plan view in a portion not having the colored layer 14A.

[0059] The interlayer film 1A has a multilayer structure in which the first layer 11A, the colored layer 14A, and the first layer 11A are provided in this order at the colored portion X. The interlayer film 1A has a three-layer structure at the colored portion X.

[0060] The interlayer film 1A has a single-layer structure consisting of only the first layer 11A in the non-colored portion Y. The interlayer film 1A has a single-layer structure in the non-colored portion Y.

[0061] Hereinafter, each material that can be used for the interlayer film of the present invention will be described in detail.

[0062] (Colorant)

[0063] The interlayer film contains a dye as a colorant, and the dye contains anthraquinone dye and pyrone dye. It should be noted that the interlayer film of the present invention may contain a dye different from both anthraquinone dye and pyrone dye as a colorant, and may contain a pigment.

[0064] Whether a colorant belongs to a dye or a pigment can be determined by classification based on a color index.

[0065] In this specification, for colorants not described in the color index, "pigment" and "dye" can be defined as follows. Prepare a polyvinyl butyral resin (polyvinyl alcohol having a degree of polymerization of 1700, a hydroxyl content of 30 mol%, an acetylation degree of 1 mol%, and a butyralization degree of 69 mol%). 100 parts by weight of the polyvinyl butyral resin, 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO), and a colorant having a content of 0.015 wt% relative to the total amount of 100 wt% of the polyvinyl butyral resin, 3GO, and the colorant are mixed and extruded to obtain a resin film (single layer) having a thickness of 760 μm. When a laminated glass is prepared using the resin film and two sheets of transparent glass (thickness 2.5 mm) having a visible light transmittance of 90% measured based on JIS R3106:1998, the colorant that makes the haze value of the obtained laminated glass 0.35% or more is defined as a pigment. A colorant having a haze value of less than 0.35% is defined as a dye.

[0066] In addition, in this specification, the color tone of a pigment means the color tone classified by a color index.

[0067] <Anthraquinone dyes>

[0068] The intermediate film contains an anthraquinone dye. The colored layer contains an anthraquinone dye. The anthraquinone dye may be used alone or in combination of two or more.

[0069] In the present specification, the anthraquinone dye is a dye having a structure represented by the following formula (X).

[0070] [Chemical formula 1]

[0071]

[0072] From the viewpoint of more effectively exerting the effects of the present invention, the anthraquinone dye is preferably a compound represented by the following formula (X1).

[0073] [Chemical formula 2]

[0074]

[0075] In the formula (X1), R 1-1 , R 1-2 , R 2-1 and R 2-2 Each independently represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group or a thiol group.

[0076] From the viewpoint of further effectively exerting the effects of the present invention, in the formula (X1), it is preferred that R 1-1 and R 1-2 Represent hydrogen atoms, R2-1 and R 2-2 represent a hydrogen atom or an amino group, respectively.

[0077] From the viewpoint of more effectively exerting the effects of the present invention, the anthraquinone dye represented by the formula (X1) is more preferably a compound represented by the following formula (X2).

[0078] [Chemical formula 3]

[0079]

[0080] In the formula (X2), R 3 and R 4 Each independently represents an alkyl group or an aryl group.

[0081] From the viewpoint of further effectively exerting the effects of the present invention, in the formula (X2), it is preferred that R 3 and R 4 It represents an aryl group.

[0082] From the viewpoint of more effectively exerting the effects of the present invention, it is more preferable that the anthraquinone dye represented by the formula (X2) is a compound represented by the following formula (X3).

[0083] [Chemical formula 4]

[0084]

[0085] In the formula (X3), R 5 and R 6 Each independently represents a hydrogen atom, an alkyl group or a sulfonyl group.

[0086] From the viewpoint of particularly effectively exhibiting the effects of the present invention, the anthraquinone dye represented by the formula (X3) is preferably a compound represented by a compound (X4) of the following formula.

[0087] [Chemical formula 5]

[0088]

[0089] In the formula (X4), R 7 , R 8 , R 9 , R 10 , R 11 and R 12 Each independently represents an alkyl group, R 13 and R 14 Each independently represents a hydrogen atom or a sulfonyl group.

[0090] From the viewpoint of particularly effectively exerting the effects of the present invention, in the formula (X4), R 7 , R8 , R 9 , R 10 , R 11 and R 12 More preferably, it represents an alkyl group, and further preferably, it represents a methyl group, an ethyl group, or a propyl group. 13 and R 14 Preferably, R represents a hydrogen atom or a sulfonyl group. The sulfonyl group is preferably a sulfonamide group. Therefore, in the formula (X4), R 13 and R 14 Preferably it represents a hydrogen atom or a sulfonamide group.

[0091] Examples of the anthraquinone dye represented by the formula (X4) include Solvent Blue 45 (CAS 37229-23-5), Solvent Blue 97 (CAS 61969-44-6, 32724-62-2), and Solvent Blue 104 (CAS 116-75-6).

[0092] Examples of the anthraquinone dye include blue pigments, yellow pigments, red pigments, and purple pigments. That is, examples of the color tone of the anthraquinone dye include blue, yellow, red, and purple.

[0093] Examples of the anthraquinone dye as the blue pigment include Solvent Blue 45 (CAS 37229-23-5), Solvent Blue 97 (CAS 61969-44-6), Solvent Blue 104 (CAS 116-75-6), and Disperse Blue 214 (CAS 104491-84-1).

[0094] Examples of the anthraquinone dye as the yellow pigment include Solvent Yellow 163 (CAS 13676-91-0) and the like.

[0095] Examples of the anthraquinone dye as the red pigment include Disperse Red 92 (CAS 12236-11-2), Solvent Red 111 (CAS 82-38-2), Solvent Red 207 (CAS 15958-69-6), Disperse Red 22 (CAS 2944-28-7), and Disperse Red 191 (CAS 103657-51-8).

[0096] Examples of the anthraquinone dye as the purple pigment include Solvent Violet 13 (CAS 81-48-1), Disperse Violet 28 (CAS 81-24-5), and Disperse Violet 31 (CAS 6408-72-6).

[0097] From the viewpoint of dyeing the colored layer and the colored part well to a blue color tone and from the viewpoint of further effectively exerting the effect of the present invention, the anthraquinone dye preferably includes a blue pigment, more preferably a blue pigment. The colored layer, the colored part or the intermediate film preferably includes the anthraquinone dye as a blue pigment.

[0098] In 100 wt % of the coloring layer, the content of the anthraquinone dye is preferably 0.380 wt % or more, more preferably 0.530 wt % or more, further preferably 0.670 wt % or more, preferably 2.700 wt % or less, more preferably 2.500 wt % or less, further preferably 1.600 wt % or less. When the content of the anthraquinone dye is above the lower limit and below the upper limit, the effect of the present invention can be further effectively exerted.

[0099] In 100 wt % of the colored layer, the content of the anthraquinone dye as a blue pigment is preferably 0.300 wt % or more, more preferably 0.450 wt % or more, further preferably 0.500 wt % or more, preferably 2.500 wt % or less, more preferably 2.000 wt % or less, further preferably 1.500 wt % or less. When the content of the anthraquinone dye as a blue pigment is above the lower limit and below the upper limit, the colored layer and the colored portion can be well dyed into a blue-like color tone, and the effect of the present invention can be further effectively exerted.

[0100] In 100 wt % of the colored part, the content of the anthraquinone dye is preferably 0.050 wt % or more, more preferably 0.070 wt % or more, further preferably 0.090 wt % or more, preferably 0.350 wt % or less, more preferably 0.300 wt % or less, further preferably 0.200 wt % or less. When the content of the anthraquinone dye is above the lower limit and below the upper limit, the effect of the present invention can be further effectively exerted.

[0101] In the described colored part 100 weight %, the total content of the anthraquinone dye as a blue pigment and the anthraquinone dye as a yellow pigment is preferably 0.050 weight % or more, more preferably 0.070 weight % or more, and further preferably 0.090 weight % or more. In the described colored part 100 weight %, the total content of the anthraquinone dye as a blue pigment and the anthraquinone dye as a yellow pigment is preferably 0.350 weight % or less, more preferably 0.300 weight % or less, and further preferably 0.200 weight % or less. When the total content is above the lower limit and below the upper limit, the effect of the present invention can be further effectively exerted.

[0102] In 100 wt % of the colored part, the content of the anthraquinone dye as a blue pigment is preferably 0.040 wt % or more, more preferably 0.060 wt % or more, further preferably 0.070 wt % or more, preferably 0.300 wt % or less, more preferably 0.270 wt % or less, further preferably 0.200 wt % or less. When the content of the anthraquinone dye as a blue pigment is above the lower limit and below the upper limit, the colored layer and the colored part can be well dyed into a blue-like color tone, and the effect of the present invention can be further effectively exerted.

[0103] In the colored layer, the colored portion, or the interlayer film, the weight ratio of the content of the anthraquinone dye to the content of the pyrone dye (the content of the anthraquinone dye / the content of the pyrone dye) is preferably 2 or more, more preferably 3 or more, and even more preferably 5 or more. In the colored layer, the colored portion, or the interlayer film, the weight ratio of the content of the anthraquinone dye to the content of the pyrone dye (the content of the anthraquinone dye / the content of the pyrone dye) is preferably 60 or less, more preferably 40 or less, and even more preferably 15 or less. When the weight ratio (the content of the anthraquinone dye / the content of the pyrone dye) is greater than or equal to the lower limit and less than or equal to the upper limit, the effect of the present invention can be more effectively exerted.

[0104] <Perylene dye>

[0105] The intermediate film contains a pyrone dye. The colored layer contains a pyrone dye. The pyrone dye may be used alone or in combination of two or more.

[0106] In the present specification, the pyrene dye is a dye having a structure represented by the following formula (Y).

[0107] [Chemical formula 6]

[0108]

[0109] From the viewpoint of more effectively exerting the effects of the present invention, the pyrenone dye is preferably a compound represented by the following formula (Y1).

[0110] [Chemical formula 7]

[0111]

[0112] In the formula (Y1), R 1 and R 2 Each independently represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group, a thiol group, or a condensed ring structure of a 5-membered ring or a 6-membered ring. 3 and R 4 Each independently represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group or a thiol group.

[0113] From the viewpoint of further effectively exerting the effects of the present invention, in the formula (Y1), R 1 and R 2 Preferably, it represents a 5-membered ring or a 6-membered ring condensed structure, and R 3 and R 4 Preferably it represents a hydrogen atom.

[0114] From the viewpoint of more effectively exerting the effects of the present invention, the pyrenone dye represented by the formula (Y1) is more preferably a compound represented by the following formula (Y2).

[0115] [Chemical formula 8]

[0116]

[0117] In the formula (Y2), R 5 It represents a group represented by the following formula (Y21) or the following formula (Y22).

[0118] [Chemical formula 9]

[0119]

[0120] In the formula (Y21), R 6 and R 7 Each independently represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group or a thiol group.

[0121] From the viewpoint of further effectively exerting the effects of the present invention, in the formula (Y21), R 6 Preferably it represents a hydrogen atom.

[0122] [Chemical formula 10]

[0123]

[0124] In the formula (Y22), R 8 represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group or a thiol group.

[0125] From the viewpoint of further effectively exerting the effects of the present invention, in the formula (Y22), R 8 It preferably represents a hydrogen atom or a halogen atom, and more preferably represents a halogen atom.

[0126] Examples of the pyrenone dye represented by the formula (Y1) include Solvent Red 135 (CAS 20749-68-2, 71902-17-5), Solvent Red 179 (CAS 6829-22-7), and Solvent Orange 60 (CAS 61969-47-9, 6925-69-5).

[0127] Examples of the pyrone dye include red pigments and orange pigments. That is, examples of the hue of the pyrone dye include red and orange.

[0128] Examples of the pyrenone dye as the red pigment include Solvent Red 135 (CAS 20749-68-2, 71902-17-5) and Solvent Red 179 (CAS 6829-22-7).

[0129] Examples of the pyrenone dye as the orange coloring matter include Solvent Orange 60 (CAS 61969-47-9, 6925-69-5).

[0130] From the viewpoint of more effectively exerting the effects of the present invention, the pyrone dye preferably contains a red pigment, and more preferably a red pigment. The colored layer, the colored portion, or the interlayer film preferably contains a pyrone dye as a red pigment.

[0131] In 100 wt % of the coloring layer, the content of the pyrone dye is preferably 0.020 wt % or more, more preferably 0.030 wt % or more, further preferably 0.070 wt % or more, preferably 0.380 wt % or less, more preferably 0.350 wt % or less, further preferably 0.300 wt % or less. When the content of the pyrone dye is above the lower limit and below the upper limit, the effect of the present invention can be further effectively exerted.

[0132] In the colored part 100 wt %, the content of the pyrone dye is preferably 0.003 wt % or more, more preferably 0.004 wt % or more, further preferably 0.010 wt % or more, preferably 0.050 wt % or less, more preferably 0.040 wt % or less, further preferably 0.035 wt % or less. When the content of the pyrone dye is above the lower limit and below the upper limit, the effect of the present invention can be further effectively exerted.

[0133] <Colorants Different from Anthraquinone Dyes and Perylene Dyes>

[0134] The interlayer film may include a colorant different from both the anthraquinone dye and the pyrone dye (hereinafter, sometimes referred to as a colorant A). The colored layer may include a colorant A. The colorant A may be used alone or in combination of two or more.

[0135] Examples of the colorant A include dyes other than anthraquinone dyes and pyrene dyes, and pigments.

[0136] As the colorant A, there can be mentioned dyes such as quinoline dyes, quinophthalone dyes, triphenylmethane dyes, methine dyes and azo dyes; organic pigments such as azo pigments, isoindolinone pigments, phthalocyanine pigments, quinacridone pigments, dibenzophenanthrene pigments, perylene pigments, indole pigments and dioxazine pigments; inorganic pigments such as carbon black, iron oxide, zinc oxide and titanium oxide, etc. It should be noted that the organic pigment can be an organic pigment having a metal atom or an organic pigment without a metal atom.

[0137] Examples of the colorant A include yellow pigments, orange pigments, red pigments, purple pigments, blue pigments, green pigments, brown pigments, black pigments, white pigments, and metallic pigments. That is, examples of the color tone of the colorant A include yellow, orange, red, purple, blue, green, brown, black, white, and metallic colors.

[0138] From the viewpoint of further effectively exerting the effects of the present invention, the colorant A preferably contains an azo pigment or a quinoline dye. The intermediate film preferably contains an azo pigment or a quinoline dye. The colored layer preferably contains an azo pigment or a quinoline dye. In this case, the colorant A, the intermediate film or the colored layer may contain both an azo pigment and a quinoline dye.

[0139] From the viewpoint of further effectively exerting the effects of the present invention, the colorant A preferably contains a yellow pigment. The intermediate film preferably contains a yellow pigment as the colorant A. The colored layer preferably contains a yellow pigment as the colorant A. The yellow pigment is preferably an azo pigment or a quinoline dye.

[0140] The type and blending amount of the colorant A can be appropriately changed according to the target color tone.

[0141] When the colorant A includes a yellow pigment, the content of the yellow pigment in 100% by weight of the colored layer exceeds 0% by weight. When the colorant A includes a yellow pigment, the content of the yellow pigment in 100% by weight of the colored layer may be 0.030% by weight or more, 0.045% by weight or more, 0.075% by weight or more, 0.610% by weight or less, 0.400% by weight or less, or 0.310% by weight or less.

[0142] When the colorant A contains a yellow pigment, the content of the yellow pigment in 100% by weight of the colored part exceeds 0% by weight. When the colorant A contains a yellow pigment, the content of the yellow pigment in 100% by weight of the colored part may be 0.004% by weight or more, 0.006% by weight or more, 0.010% by weight or more, 0.080% by weight or less, 0.050% by weight or less, or 0.040% by weight or less.

[0143] In the case where the colorant A includes an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye in 100% by weight of the coloring layer exceeds 0% by weight. In the case where the colorant A includes an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye in 100% by weight of the coloring layer may be 0.030% by weight or more, 0.045% by weight or more, or 0.075% by weight or more. In the case where the colorant A includes an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye in 100% by weight of the coloring layer may be 0.400% by weight or less, 0.350% by weight or less, or 0.300% by weight or less.

[0144] In the case where the colorant A contains an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye in 100% by weight of the coloring part exceeds 0% by weight. In the case where the colorant A contains an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye in 100% by weight of the coloring part may be 0.004% by weight or more, 0.006% by weight or more, or 0.010% by weight or more. In the case where the colorant A contains an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye in 100% by weight of the coloring part may be 0.050% by weight or less, 0.040% by weight or less, or 0.038% by weight or less.

[0145] In the case where the colorant A includes an azo pigment or a quinoline dye, the content of each azo pigment and quinoline dye exceeds 0 weight % in the 100 weight % of the colored part. In the case where the colorant A includes a pigment, the content of the pigment in the 100 weight % of the colored layer is preferably 0.008 weight % or more, more preferably 0.015 weight % or more, further preferably 0.065 weight % or more, preferably 0.460 weight % or less, more preferably 0.400 weight % or less, and further preferably 0.300 weight % 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. In addition, when the content of the pigment is below the upper limit, the haze of the laminated glass can be further reduced.

[0146] When the colorant A includes a pigment, the content of the pigment exceeds 0% by weight in 100% by weight of the colored part. When the colorant A includes a pigment, the content of the pigment in 100% by weight of the colored part is preferably 0.001% by weight or more, more preferably 0.002% by weight or more, further preferably 0.010% by weight or more, preferably 0.060% by weight or less, more preferably 0.050% by weight or less, and further preferably 0.030% by weight 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. In addition, when the content of the pigment is below the upper limit, the haze of the laminated glass can be further reduced.

[0147] When the coloring layer contains the colorant A, the content of the colorant A exceeds 0% by weight in 100% by weight of the coloring layer. The content of the colorant A in 100% by weight of the coloring layer is preferably 0.030% by weight or more, more preferably 0.045% by weight or more, and further preferably 0.075% by weight or more, and preferably 0.610% by weight or less, more preferably 0.400% by weight or less, and further preferably 0.310% by weight or less. When the content of the colorant A is above the lower limit and below the upper limit, the effect of the present invention can be more effectively exerted.

[0148] When the coloring part contains the colorant A, the content of the colorant A exceeds 0% by weight in 100% by weight of the coloring part. The content of the colorant A in 100% by weight of the coloring part is preferably 0.004% by weight or more, more preferably 0.006% by weight or more, and further preferably 0.010% by weight or more, and preferably 0.080% by weight or less, more preferably 0.050% by weight or less, and further preferably 0.040% by weight or less. When the content of the colorant A is above the lower limit and below the upper limit, the effect of the present invention can be more effectively exerted.

[0149] (Light Stabilizer)

[0150] The intermediate film preferably contains a light stabilizer. The first layer preferably contains a light stabilizer. The second layer preferably contains a light stabilizer. The third layer preferably contains a light stabilizer. The colored layer preferably contains a light stabilizer. By using the light stabilizer, it is possible to effectively suppress the degradation of the resin, for example, it is possible to effectively suppress the bubbling in the end of the laminated glass. In addition, by using the light stabilizer, it is made more difficult to reduce the visible light transmittance. The light stabilizer may be used alone or in combination of two or more.

[0151] It should be noted that in laminated glass using an interlayer film containing a dye and a light stabilizer, weather resistance is more likely to decrease and the color tone of the colored portion is more likely to change. In contrast, in the interlayer film of the present invention, since a specific dye is used, even if the colored layer contains a light stabilizer in addition to the anthraquinone dye and the pyrene dye, the weather resistance of the laminated glass can be further improved, and the effect of the present invention can be further effectively exerted.

[0152] From the viewpoint of more effectively exhibiting the effects of the present invention, the light stabilizer is preferably a light stabilizer in which a carbon atom is bonded to a nitrogen atom of a piperidine structure, and more preferably a hindered amine light stabilizer.

[0153] As the hindered amine light stabilizer, there can be mentioned a hindered amine light stabilizer in which a carbon atom, an oxygen atom of an alkoxy group or a hydrogen atom is bonded to a nitrogen atom of a piperidine structure. From the viewpoint of further suppressing discoloration, a hindered amine light stabilizer in which a carbon atom or an oxygen atom of an alkoxy group is bonded to a nitrogen atom of a piperidine structure is preferred. The hindered amine light stabilizer is preferably a hindered amine light stabilizer in which a carbon atom is bonded to a nitrogen atom of a piperidine structure, and is also preferably a hindered amine light stabilizer in which an oxygen atom of an alkoxy group is bonded to a nitrogen atom of a piperidine structure.

[0154] In the light stabilizer having a carbon atom bonded to a nitrogen atom of a piperidine structure, the carbon atom bonded to the nitrogen atom of the piperidine structure is preferably a carbon atom of an alkyl group or an alkylene group bonded to the nitrogen atom of the piperidine structure.

[0155] Examples of the hindered amine light stabilizer having a carbon atom bonded to a nitrogen atom of a piperidine structure include "Tinuvin 765" and "Tinuvin 622SF" manufactured by BASF and "ADK STAB LA-52" manufactured by ADEKA.

[0156] Examples of the hindered amine light stabilizer having an alkoxy group bonded to the nitrogen atom of the piperidine structure include "Tinuvin XT-850FF" and "Tinuvin XT-855FF" manufactured by BASF and "ADK STAB LA-81" manufactured by ADEKA.

[0157] Examples of the hindered amine light stabilizer having a hydrogen atom bonded to a nitrogen atom of a piperidine structure include "Tinuvin 770DF" manufactured by BASF and "Hostavin N24" manufactured by CLARIANT.

[0158] From the viewpoint of more effectively exerting the effects of the present invention, the molecular weight of the light stabilizer is preferably 2000 or less, more preferably 1000 or less, and even more preferably 700 or less. The molecular weight of the light stabilizer may be 100 or more.

[0159] The content of the light stabilizer in 100 wt % of the intermediate film or in 100 wt % of the layer (first layer, second layer, third layer or colored layer) containing the light stabilizer is preferably 0.0025 wt % or more, more preferably 0.025 wt % or more, and preferably 0.5 wt % or less, more preferably 0.3 wt % or less. When the content of the light stabilizer is above the lower limit and below the upper limit, the effect of the present invention can be more effectively exerted.

[0160] (Thermoplastic resin)

[0161] The intermediate film preferably contains a thermoplastic resin (hereinafter sometimes described as thermoplastic resin (0)). The intermediate film preferably contains a polyvinyl acetal resin (hereinafter sometimes described as polyvinyl acetal resin (0)) as the thermoplastic resin (0). The first layer preferably contains a thermoplastic resin (hereinafter sometimes described as thermoplastic resin (1)). The first layer preferably contains a polyvinyl acetal resin (hereinafter sometimes described as polyvinyl acetal resin (1)) as the thermoplastic resin (1). The second layer preferably contains a thermoplastic resin (hereinafter sometimes described as thermoplastic resin (2)). The second layer preferably contains a polyvinyl acetal resin (hereinafter sometimes described as polyvinyl acetal resin (2)) as the thermoplastic resin (2). The third layer preferably contains a thermoplastic resin (hereinafter sometimes described as thermoplastic resin (3)). The third layer preferably contains a polyvinyl acetal resin (hereinafter sometimes described as polyvinyl acetal resin (3)) as the thermoplastic resin (3). The colored layer preferably contains a thermoplastic resin (hereinafter sometimes described as thermoplastic resin (4)). The colored layer preferably contains a polyvinyl acetal resin (hereinafter sometimes described as polyvinyl acetal resin (4)) as the thermoplastic resin (4). The thermoplastic resin (1), the thermoplastic resin (2), the thermoplastic resin (3) and the thermoplastic resin (4) may be the same or different. In order to further improve the sound insulation, the thermoplastic resin (1) is preferably different from the thermoplastic resin (2) and the thermoplastic resin (3). The polyvinyl acetal resin (1), the polyvinyl acetal resin (2), the polyvinyl acetal resin (3) and the polyvinyl acetal resin (4) may be the same or different. In order to further improve the sound insulation, the polyvinyl acetal resin (1) is preferably different from the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3). The thermoplastic resin (0), the thermoplastic resin (1), the thermoplastic resin (2), the thermoplastic resin (3) and the thermoplastic resin (4) may be used alone or in combination of two or more. The polyvinyl acetal resin (0), the polyvinyl acetal resin (1), the polyvinyl acetal resin (2), the polyvinyl acetal resin (3), and the polyvinyl acetal resin (4) may be used alone or in combination of two or more.

[0162] 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. Other thermoplastic resins may also be used.

[0163] The polyvinyl acetal resin is 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 is 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%.

[0164] 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. If the average degree of polymerization is above the lower limit, the penetration resistance of the laminated glass is further improved. If the average degree of polymerization is below the upper limit, the formation of the interlayer film becomes easy.

[0165] The average degree of polymerization of the polyvinyl alcohol is determined by a method in accordance with JIS K6726 "Testing methods for polyvinyl alcohol".

[0166] 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. If the number of carbon atoms in the acetal group in the polyvinyl acetal resin is 3 or more, the glass transition temperature of the intermediate film is sufficiently reduced. The number of carbon atoms in the acetal group in the polyvinyl acetal resin may be 4 or 5.

[0167] The aldehyde is not particularly limited. Generally, an aldehyde having 1 to 10 carbon atoms is preferably used. Examples of the aldehyde having 1 to 10 carbon atoms include propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexanal, n-octanal, n-nonanal, n-decanal, formaldehyde, acetaldehyde, and benzaldehyde. The aldehyde is preferably propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-hexanal, or n-valeraldehyde, more preferably propionaldehyde, n-butyraldehyde, or isobutyraldehyde, and even more preferably n-butyraldehyde. The aldehyde may be used alone or in combination of two or more.

[0168] The hydroxyl content (hydroxyl amount) of the polyvinyl acetal resin (0) is preferably 15 mol% or more, more preferably 18 mol% or more, and preferably 40 mol% or less, more preferably 35 mol% or less. When the hydroxyl content is above the lower limit, the adhesive force of the interlayer film is further increased. In addition, when the hydroxyl content is below the upper limit, the softness of the interlayer film is increased, and the handling of the interlayer film becomes easy.

[0169] The hydroxyl content (hydroxyl amount) of the polyvinyl acetal resin (1) is preferably 17 mol% or more, more preferably 20 mol% or more, further preferably 22 mol% or more, and preferably 28 mol% or less, more preferably 27 mol% or less, further preferably 25 mol% or less, and particularly preferably 24 mol% or less. When the hydroxyl content is above the lower limit, the mechanical strength of the interlayer film is further increased. In particular, when the hydroxyl content of the polyvinyl acetal resin (1) is 20 mol% or more, the reaction efficiency is high and the productivity is excellent. In addition, when it is 28 mol% or less, the sound insulation of the laminated glass is further increased. In addition, when the hydroxyl content is below the upper limit, the softness of the interlayer film is increased, and the handling of the interlayer film becomes easy.

[0170] The preferred range of the hydroxyl content of the polyvinyl acetal resin (4) when the colored layer is embedded in the first layer is the same as the preferred range of the hydroxyl content of the polyvinyl acetal resin (1). The preferred range of the hydroxyl content of the polyvinyl acetal resin (4) when the colored layer is not embedded in the second layer and the third layer and the colored layer is not a surface layer of the intermediate film is the same as the preferred range of the hydroxyl content of the polyvinyl acetal resin (1).

[0171] The hydroxyl content (hydroxyl amount) of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 25 mol% or more, more preferably 28 mol% or more, more preferably 30 mol% or more, further preferably 31.5 mol% or more, further preferably 32 mol% or more, and particularly preferably 33 mol% or more. The hydroxyl content (hydroxyl amount) of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 38 mol% or less, more preferably 37 mol% or less, further preferably 36.5 mol% or less, and particularly preferably 36 mol% or less. When the hydroxyl content is above the lower limit, the adhesive force of the interlayer film is further improved. In addition, when the hydroxyl content is below the upper limit, the softness of the interlayer film increases, and the handling of the interlayer film becomes easy.

[0172] When the colored layer is embedded in the second layer or the third layer, the preferred range of the hydroxyl content of the polyvinyl acetal resin (4) is the same as the preferred range of the hydroxyl content of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3). When the colored layer is a surface layer of the intermediate film, the preferred range of the hydroxyl content of the polyvinyl acetal resin (4) is the same as the preferred range of the hydroxyl content of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3).

[0173] From the viewpoint of further improving the sound insulation, the hydroxyl content of the polyvinyl acetal resin (1) is preferably lower than the hydroxyl content of the polyvinyl acetal resin (2). From the viewpoint of further improving the sound insulation, the hydroxyl content of the polyvinyl acetal resin (1) is preferably lower than the hydroxyl content of the polyvinyl acetal resin (3). The absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (1) and the hydroxyl content of the polyvinyl acetal resin (2) is set as the absolute value A, and the absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (1) and the hydroxyl content of the polyvinyl acetal resin (3) is set as the absolute value B. From the viewpoint of further improving the sound insulation, the absolute value A and the absolute value B are preferably 1 mol% or more, more preferably 5 mol% or more, further preferably 9 mol% or more, particularly preferably 10 mol% or more, and most preferably 12 mol% or more. The absolute value A and the absolute value B are preferably 20 mol% or less, respectively.

[0174] There are cases where the colored layer is embedded in the first layer, and cases where the colored layer is not embedded in the second layer and the third layer and the colored layer is not a surface layer of the intermediate film. In these cases, from the viewpoint of further improving the sound insulation, the hydroxyl content of the polyvinyl acetal resin (4) is preferably lower than the hydroxyl content of the polyvinyl acetal resin (2). From the viewpoint of further improving the sound insulation, the hydroxyl content of the polyvinyl acetal resin (4) is preferably lower than the hydroxyl content of the polyvinyl acetal resin (3). The absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (4) and the hydroxyl content of the polyvinyl acetal resin (2) is set to an absolute value C, and the absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (4) and the hydroxyl content of the polyvinyl acetal resin (3) is set to an absolute value D. From the viewpoint of further improving the sound insulation, the absolute value C and the absolute value D are each preferably 1 mol% or more, more preferably 5 mol% or more, further preferably 9 mol% or more, particularly preferably 10 mol% or more, and most preferably 12 mol% or more. The absolute value C and the absolute value D are each preferably 20 mol% or less.

[0175] There is a case where the colored layer is buried in the second layer or the third layer, and there is a case where the colored layer is a surface layer. In such a case, from the viewpoint of further improving the sound insulation, the hydroxyl content of the polyvinyl acetal resin (1) is preferably lower than the hydroxyl content of the polyvinyl acetal resin (4). From the viewpoint of further improving the sound insulation, the absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (1) and the hydroxyl content of the polyvinyl acetal resin (4) is preferably 1 mol% or more, more preferably 5 mol% or more, further preferably 9 mol% or more, particularly preferably 10 mol% or more, and most preferably 12 mol% or more. The absolute value of the difference between the hydroxyl content of the polyvinyl acetal resin (1) and the hydroxyl content of the polyvinyl acetal resin (4) is preferably 20 mol% or less.

[0176] The hydroxyl content of the polyvinyl acetal resin is a value expressed as a percentage by dividing the amount of ethylene groups bonded with hydroxyl groups by the total amount of ethylene groups in the main chain. The amount of ethylene groups bonded with hydroxyl groups can be measured, for example, in accordance with JIS K6728 "Testing methods for polyvinyl butyral".

[0177] The acetylation degree (acetyl group amount) of the polyvinyl acetal resin (0) is preferably 0.1 mol% or more, more preferably 0.3 mol% or more, and further preferably 0.5 mol% or more, and is preferably 30 mol% or less, more preferably 25 mol% or less, and further preferably 20 mol% or less. When the acetylation degree is above the lower limit, the compatibility of the polyvinyl acetal resin with the plasticizer becomes high. When the acetylation degree is below the upper limit, the moisture resistance of the interlayer film and the laminated glass becomes high.

[0178] The degree of acetylation (acetyl group content) of the polyvinyl acetal resin (1) is preferably 0.01 mol% or more, more preferably 0.1 mol% or more, further preferably 7 mol% or more, further preferably 9 mol% or more, and preferably 30 mol% or less, more preferably 25 mol% or less, further preferably 24 mol% or less, and particularly preferably 20 mol% or less. When the degree of acetylation is above the lower limit, the compatibility of the polyvinyl acetal resin with the plasticizer becomes high. When the degree of acetylation is below the upper limit, the moisture resistance of the interlayer film and the laminated glass becomes high. In particular, when the degree of acetylation of the polyvinyl acetal resin (1) is 0.1 mol% or more and 25 mol% or less, the penetration resistance is excellent.

[0179] The preferred range of the acetylation degree of the polyvinyl acetal resin (4) when the colored layer is embedded in the first layer is the same as the preferred range of the acetylation degree of the polyvinyl acetal resin (1). The preferred range of the acetylation degree of the polyvinyl acetal resin (4) when the colored layer is not embedded in the second layer and the third layer and the colored layer is not a surface layer of the intermediate film is the same as the preferred range of the acetylation degree of the polyvinyl acetal resin (1).

[0180] The acetylation degree (acetyl group amount) of each of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) 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 high. When the acetylation degree is below the upper limit, the moisture resistance of the interlayer film and the laminated glass becomes high.

[0181] When the colored layer is embedded in the second layer or the third layer, the preferred range of the acetylation degree of the polyvinyl acetal resin (4) is the same as the preferred range of the acetylation degree of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3). When the colored layer is a surface layer of the intermediate film, the preferred range of the acetylation degree of the polyvinyl acetal resin (4) is the same as the preferred range of the acetylation degree of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3).

[0182] The acetylation degree is a value expressed as a percentage of the molar fraction obtained by dividing the amount of ethylene groups bonded with acetyl groups by the total amount of ethylene groups in the main chain. The amount of ethylene groups bonded with acetyl groups can be measured, for example, in accordance with JIS K6728 "Testing methods for polyvinyl butyral".

[0183] The degree of acetalization of the polyvinyl acetal resin (0) (the degree of butyralization in the case of a polyvinyl butyral resin) is preferably 60 mol% or more, more preferably 63 mol% or more, and preferably 85 mol% or less, more preferably 75 mol% or less, and further preferably 70 mol% or less. If the degree of acetalization is above the lower limit, the compatibility of the polyvinyl acetal resin with the plasticizer becomes high. If the degree of acetalization is below the upper limit, the reaction time required for producing the polyvinyl acetal resin becomes short.

[0184] The degree of acetalization of the polyvinyl acetal resin (1) (the degree of butyralization in the case of a polyvinyl butyral resin) is preferably 47 mol% or more, more preferably 60 mol% or more, and preferably 85 mol% or less, more preferably 80 mol% or less, and further preferably 75 mol% or less. If the degree of acetalization is above the lower limit, the compatibility of the polyvinyl acetal resin with the plasticizer becomes high. If the degree of acetalization is below the upper limit, the reaction time required for producing the polyvinyl acetal resin becomes short.

[0185] When the colored layer is embedded in the first layer, the preferred range of the acetalization degree of the polyvinyl acetal resin (4) is the same as the preferred range of the acetalization degree of the polyvinyl acetal resin (1). When the colored layer is not embedded in the second layer and the third layer and the colored layer is not a surface layer of the intermediate film, the preferred range of the acetalization degree of the polyvinyl acetal resin (4) is the same as the preferred range of the acetalization degree of the polyvinyl acetal resin (1).

[0186] The acetalization degree of each of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) (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 high. When the acetalization degree is below the upper limit, the reaction time required for producing the polyvinyl acetal resin becomes short.

[0187] When the colored layer is embedded in the second layer or the third layer, the preferred range of the acetalization degree of the polyvinyl acetal resin (4) is the same as the preferred range of the acetalization degree of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3). When the colored layer is a surface layer of the intermediate film, the preferred range of the acetalization degree of the polyvinyl acetal resin (4) is the same as the preferred range of the acetalization degree of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3).

[0188] The acetalization degree is obtained as follows. First, the value obtained by subtracting the amount of ethylene bonded to a hydroxyl group and the amount of ethylene bonded to an acetyl group from the total amount of ethylene in the main chain is obtained. The obtained value is divided by the total amount of ethylene in the main chain to obtain the mole fraction. The acetalization degree is a value expressed as a percentage of the mole fraction.

[0189] It should be noted that the hydroxyl content (hydroxyl amount), acetalization degree (butyralization degree) and acetylation degree are preferably calculated based on the results measured by the method according to JIS K6728 "Testing methods for polyvinyl butyral". However, the measurement according to 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), the acetalization degree (butyralization degree) and the acetylation degree can be calculated based on the results measured by the method according to JIS K6728 "Testing methods for polyvinyl butyral".

[0190] The content of the polyvinyl acetal resin in 100 wt % of the thermoplastic resin contained in the intermediate film 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 contained in the intermediate film is preferably 100 wt % or less. The main component (50 wt % or more) of the thermoplastic resin of the intermediate film is preferably the polyvinyl acetal resin.

[0191] In 100 wt % of the thermoplastic resin contained in the first 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 first 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 of the first layer is preferably the polyvinyl acetal resin.

[0192] In 100 wt % of the thermoplastic resin contained in the second 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 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 layer is preferably the polyvinyl acetal resin.

[0193] In 100 wt % of the thermoplastic resin contained in the third 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 third 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 third layer is preferably the polyvinyl acetal resin.

[0194] The content of the polyvinyl acetal resin in 100% by weight of the thermoplastic resin contained in the colored layer is preferably 10% by weight or more, more preferably 30% by weight or more, further preferably 50% by weight or more, further preferably 70% by weight or more, particularly preferably 80% by weight or more, and most preferably 90% by weight or more. The content of the polyvinyl acetal resin in 100% by weight of the thermoplastic resin contained in the colored layer is preferably 100% by weight or less. The main component (50% by weight or more) of the thermoplastic resin in the colored layer is preferably a polyvinyl acetal resin.

[0195] (Plasticizer)

[0196] From the viewpoint of further improving the adhesive force of the intermediate film, the intermediate film of the present invention preferably contains a plasticizer (hereinafter sometimes described as plasticizer (0)). The first layer preferably contains a plasticizer (hereinafter sometimes described as plasticizer (1)). The second layer preferably contains a plasticizer (hereinafter sometimes described as plasticizer (2)). The third layer preferably contains a plasticizer (hereinafter sometimes described as plasticizer (3)). The colored layer preferably contains a plasticizer (hereinafter sometimes described as plasticizer (4)). When the thermoplastic resin contained in the intermediate film is a polyvinyl acetal resin, the intermediate film (each layer) particularly preferably contains a plasticizer. The layer containing the polyvinyl acetal resin preferably contains a plasticizer.

[0197] The plasticizer is not particularly limited. As the plasticizer, a conventionally known plasticizer can be used. The plasticizer can be used alone or in combination of two or more.

[0198] Examples of the plasticizer include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, and organic phosphoric acid plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers. The plasticizer is preferably an organic ester plasticizer. The plasticizer is preferably a liquid plasticizer.

[0199] 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, heptanoic acid, n-octanoic acid, 2-ethylhexanoic acid, n-nonanoic acid, decanoic acid and benzoic acid, etc.

[0200] Examples of the polybasic organic acid esters 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 acids include adipic acid, sebacic acid, and azelaic acid.

[0201] 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 plasticizers other than these can also be used. The organic ester plasticizers other than these can also be used. The organic ester plasticizers other than these can also be used. The organic ester plasticizers other than the adipic acid esters can also be used.

[0202] Examples of the organic phosphoric acid plasticizer include tributoxyethyl phosphate, isodecylphenyl phosphate, and triisopropyl phosphate.

[0203] The plasticizer is preferably a diester plasticizer represented by the following formula (1).

[0204] [Chemical formula 11]

[0205]

[0206] 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, more preferably represent an organic group having 6 to 10 carbon atoms.

[0207] The plasticizer preferably comprises triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH) or triethylene glycol di-2-ethylpropionate. The plasticizer more preferably comprises triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH), and further preferably comprises triethylene glycol di-2-ethylhexanoate.

[0208] In the interlayer film, the content of the plasticizer (0) relative to 100 parts by weight of the thermoplastic resin (0) is referred to as content (0). The content (0) is preferably 5 parts by weight or more, more preferably 25 parts by weight or more, and further preferably 30 parts by weight or more, and is preferably 100 parts by weight or less, more preferably 60 parts by weight or less, and further preferably 50 parts by weight or less. When the content (0) is greater than or equal to the lower limit, the penetration resistance of the laminated glass is further increased. When the content (0) is less than or equal to the upper limit, the transparency of the interlayer film is further increased.

[0209] In the first layer, the content of the plasticizer (1) relative to 100 parts by weight of the thermoplastic resin (1) is referred to as content (1). The content (1) is preferably 50 parts by weight or more, more preferably 55 parts by weight or more, and further preferably 60 parts by weight or more. The content (1) is preferably 100 parts by weight or less, more preferably 90 parts by weight or less, further preferably 85 parts by weight or less, and particularly preferably 80 parts by weight or less. When the content (1) is above the lower limit, the softness of the interlayer film increases, and the handling of the interlayer film becomes easier. When the content (1) is below the upper limit, the penetration resistance of the laminated glass is further improved.

[0210] When the colored layer is embedded in the first layer, the preferred range of the content of the plasticizer (4) relative to 100 parts by weight of the thermoplastic resin (4) (hereinafter, sometimes described as content (4)) is the same as the preferred range of content (1). When the colored layer is not embedded in the second layer and the third layer and the colored layer is not a surface layer of the interlayer film, the preferred range of the content of the plasticizer (4) relative to 100 parts by weight of the thermoplastic resin (4) (hereinafter, sometimes described as content (4)) in the colored layer is the same as the preferred range of content (1).

[0211] In the second layer, the content of the plasticizer (2) relative to 100 parts by weight of the thermoplastic resin (2) is referred to as content (2). In the third layer, the content of the plasticizer (3) relative to 100 parts by weight of the thermoplastic resin (3) is referred to as content (3). The content (2) and the content (3) 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. The content (2) and the content (3) are each 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 (2) and the content (3) are at least the lower limit, the softness of the interlayer film increases, and the handling of the interlayer film becomes easy. When the content (2) and the content (3) are at most the upper limit, the penetration resistance of the laminated glass is further improved.

[0212] When the colored layer is embedded in the second layer or the third layer, the preferred range of the content of the plasticizer (4) relative to 100 parts by weight of the thermoplastic resin (4) (hereinafter, sometimes described as content (4)) is the same as the preferred range of the content (2) and the content (3). When the colored layer is a surface layer of the intermediate film, the preferred range of the content of the plasticizer (4) relative to 100 parts by weight of the thermoplastic resin (4) (hereinafter, sometimes described as content (4)) is the same as the preferred range of the content (2) and the content (3).

[0213] In order to improve the sound insulation of the laminated glass, the content (1) is preferably greater than the content (2), and the content (1) is preferably greater than the content (3).

[0214] When the colored layer is buried in the first layer and when the colored layer is not a surface layer of the intermediate film, in order to improve the sound insulation of the laminated glass, the content (4) is preferably greater than the content (2), and more preferably the content (4) is greater than the content (3).

[0215] When the colored layer is embedded in the second layer or the third layer, and when the colored layer is a surface layer of an interlayer film, in order to improve the sound insulation of the laminated glass, the content (1) is preferably greater than the content (4).

[0216] From the viewpoint of further improving the sound insulation of laminated glass, the absolute value of the difference between the content (2) and the content (1), and the absolute value of the difference between the content (3) and the content (1) are each preferably 10 parts by weight or more, more preferably 15 parts by weight or more, and even more preferably 20 parts by weight or more. The absolute value of the difference between the content (2) and the content (1), and the absolute value of the difference between the content (3) and the content (1) are each preferably 80 parts by weight or less, more preferably 75 parts by weight or less, and even more preferably 70 parts by weight or less.

[0217] There are cases where the colored layer is embedded in the first layer, and cases where the colored layer is not embedded in the second layer and the third layer and the colored layer is not a surface layer of the interlayer film. In this case, from the viewpoint of further improving the sound insulation of the laminated glass, the absolute value of the difference between the content (2) and the content (4), and the absolute value of the difference between the content (3) and the content (4) are preferably 10 parts by weight or more, more preferably 15 parts by weight or more, and even more preferably 20 parts by weight or more. The absolute value of the difference between the content (2) and the content (4), and the absolute value of the difference between the content (3) and the content (4) are preferably 80 parts by weight or less, more preferably 75 parts by weight or less, and even more preferably 70 parts by weight or less.

[0218] When the colored layer is embedded in the second layer or the third layer, and when the colored layer is a surface layer of the interlayer, from the viewpoint of further improving the sound insulation of the laminated glass, the absolute value of the difference between the content (4) and the content (1) is preferably 10 parts by weight or more, more preferably 15 parts by weight or more, and even more preferably 20 parts by weight or more. The absolute value of the difference between the content (4) and the content (1) is preferably 80 parts by weight or less, more preferably 75 parts by weight or less, and even more preferably 70 parts by weight or less.

[0219] (Thermal insulation material)

[0220] The intermediate film preferably contains a heat insulating substance. The first layer preferably contains a heat insulating substance. The second layer preferably contains a heat insulating substance. The third layer preferably contains a heat insulating substance. The colored layer preferably contains a heat insulating substance. The heat insulating substances may be used alone or in combination of two or more.

[0221] The heat-insulating material preferably contains at least one component X selected from phthalocyanine compounds, naphthalocyanine compounds and anthracyanine compounds, or contains heat-insulating particles. In this case, it is preferred to contain both the component X and the heat-insulating particles. It should be noted that the heat-insulating material may be the colorant.

[0222] Ingredient X:

[0223] The intermediate film preferably contains at least one component X selected from phthalocyanine compounds, naphthalocyanine compounds, or anthracyanine compounds. The first layer preferably contains the component X. The second layer preferably contains the component X. The third layer preferably contains the component X. The colored layer preferably contains the component X. The component X is a heat-insulating compound. The component X may be used alone or in combination of two or more.

[0224] The component X is not particularly limited. As the component X, conventionally known phthalocyanine compounds, naphthalocyanine compounds, and anthracyanine compounds can be used.

[0225] Examples of the component X include phthalocyanine, phthalocyanine derivatives, naphthalocyanine, naphthalocyanine derivatives, anthraphthalocyanine, and anthraphthalocyanine derivatives. The phthalocyanine compound and the phthalocyanine derivative preferably have a phthalocyanine skeleton. The naphthalocyanine compound and the naphthalocyanine derivative preferably have a naphthalocyanine skeleton. The anthraphthalocyanine compound and the anthraphthalocyanine derivative preferably have an anthraphthalocyanine skeleton.

[0226] From the viewpoint of further improving the heat shielding properties of the interlayer film and laminated glass, the component X is preferably one selected from phthalocyanine, phthalocyanine derivatives, naphthalocyanine or naphthalocyanine derivatives, and more preferably one selected from phthalocyanine and phthalocyanine derivatives.

[0227] From the viewpoint of effectively improving the heat insulation and maintaining the visible light transmittance at a higher level for a long time, the component X preferably contains a vanadium atom or a copper atom. The component X preferably contains a vanadium atom, and also preferably contains a copper atom. The component X is more preferably at least one of a phthalocyanine containing a vanadium atom or a copper atom and a derivative of a phthalocyanine containing a vanadium atom or a copper atom. From the viewpoint of further improving the heat insulation of the interlayer film and the laminated glass, the component X preferably has a structural unit in which an oxygen atom is bonded to a vanadium atom.

[0228] The content of the component X in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer, third layer or colored layer) containing the component X is preferably 0.001% by weight or more, more preferably 0.005% by weight or more, further preferably 0.01% by weight or more, and particularly preferably 0.02% by weight or more. The content of the component X in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer, third layer or colored layer) containing the component X is preferably 0.2% by weight or less, more preferably 0.1% by weight or less, further preferably 0.05% by weight or less, and particularly preferably 0.04% by weight or less. When the content of the component X is above the lower limit and below the upper limit, the heat insulation property becomes sufficiently high and the visible light transmittance becomes sufficiently high. For example, the visible light transmittance can be made 70% or more.

[0229] Thermal insulation particles:

[0230] The intermediate film preferably contains heat-insulating particles. The first layer preferably contains the heat-insulating particles. The second layer preferably contains the heat-insulating particles. The third layer preferably contains the heat-insulating particles. The colored layer preferably contains the heat-insulating particles. The heat-insulating particles are heat-insulating substances. By using heat-insulating particles, infrared rays (heat rays) can be effectively blocked. The heat-insulating particles can be used alone or in combination of two or more.

[0231] From the viewpoint of further improving the heat shielding property of laminated glass, the heat shielding particles are more preferably metal oxide particles. The heat shielding particles are preferably particles formed of a metal oxide (metal oxide particles).

[0232] The energy of infrared rays with a wavelength longer than visible light and a wavelength of more than 780nm is smaller than that of ultraviolet rays. However, infrared rays have a greater thermal effect, and when infrared rays are absorbed by a substance, they are released in the form of heat. Therefore, infrared rays are generally called heat rays. By using the heat-insulating particles, infrared rays (heat rays) can be effectively blocked. It should be noted that the so-called heat-insulating particles refer to particles that can absorb infrared rays.

[0233] Specific 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, or lanthanum hexaboride (LaB 6) particles, etc. Insulating particles other than these may also be used. In terms of having a high shielding function for heat lines, metal oxide particles are preferred, and ATO particles, GZO particles, IZO particles, ITO particles or tungsten oxide particles are more preferred, and ITO particles or tungsten oxide particles are particularly preferred. In particular, in terms of having a high shielding function for heat lines and being easy to obtain, tin-doped indium oxide particles (ITO particles) are preferred, and tungsten oxide particles are also preferred.

[0234] From the viewpoint of further improving the heat insulation of the interlayer film and the laminated glass, the tungsten oxide particles are preferably metal-doped tungsten oxide particles. The "tungsten oxide particles" include metal-doped tungsten oxide particles. As the metal-doped tungsten oxide particles, specifically, sodium-doped tungsten oxide particles, cesium-doped tungsten oxide particles, thallium-doped tungsten oxide particles, and rubidium-doped tungsten oxide particles can be cited.

[0235] From the viewpoint of further improving the heat shielding property of the interlayer film and the laminated glass, cesium-doped tungsten oxide particles are particularly preferred. From the viewpoint of further improving the heat shielding property of the interlayer film and the laminated glass, the cesium-doped tungsten oxide particles are preferably of the formula: Cs 0.33 WO 3 The tungsten oxide particles shown.

[0236] 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 is sufficiently improved. When the average particle size is below the upper limit, the dispersibility of the heat shielding particles is improved.

[0237] The “average particle size” refers to a volume average particle size. The average particle size can be measured using a particle size distribution measuring device (“UPA-EX150” manufactured by Nikkiso Co., Ltd.) or the like.

[0238] In 100 wt% of the intermediate film or in 100 wt% of the layer (first layer, second layer, third layer or colored layer) containing the heat shielding particles, the content of the heat shielding particles (particularly the content of tungsten oxide particles) is preferably 0.01 wt% or more, more preferably 0.1 wt% or more, further preferably 1 wt% or more, and particularly preferably 1.5 wt% or more. In 100 wt% of the intermediate film or in 100 wt% of the layer (first layer, second layer, third layer or colored layer) containing the heat shielding particles, the content of the heat shielding particles (particularly the content of tungsten oxide particles) is preferably 6 wt% or less, more preferably 5.5 wt% or less, further preferably 4 wt% or less, particularly preferably 3.5 wt% or less, and most preferably 3 wt% or less. When the content of the heat shielding particles is above the lower limit and below the upper limit, the heat shielding property is sufficiently high, and the visible light transmittance is sufficiently high.

[0239] (Metal Salt)

[0240] The intermediate film 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 layer preferably contains the metal salt M. The second layer preferably contains the metal salt M. The third layer preferably contains the metal salt M. The colored 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 intermediate film and laminated glass components such as glass plates or the adhesion between the layers in the intermediate film. The metal salt M may be used alone or in combination of two or more.

[0241] The metal salt M preferably includes at least one metal selected from Li, Na, K, Rb, Cs, Mg, Ca, Sr, or Ba. The metal salt contained in the intermediate film preferably includes at least one metal of K and Mg.

[0242] In addition, as the metal salt M, 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. The metal salt M may include a magnesium carboxylate having 2 to 16 carbon atoms or a potassium carboxylate having 2 to 16 carbon atoms.

[0243] 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.

[0244] The total content of Mg and K in the interlayer film containing the metal salt M or the layer (first layer, second layer, third layer or colored 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 greater than the lower limit and less than the upper limit, the adhesion between the interlayer film and the laminated glass component (glass plate, etc.) or the adhesion between the layers in the interlayer film can be further well controlled.

[0245] (UV shielding agent)

[0246] The intermediate film preferably contains an ultraviolet shielding agent. The first layer preferably contains an ultraviolet shielding agent. The second layer preferably contains an ultraviolet shielding agent. The third layer preferably contains an ultraviolet shielding agent. The colored layer preferably contains an ultraviolet shielding agent. By using an ultraviolet shielding agent, the visible light transmittance is not likely to become lower even if the intermediate film 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.

[0247] The ultraviolet shielding agent contains an ultraviolet absorber. The ultraviolet shielding agent is preferably an ultraviolet absorber.

[0248] 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.

[0249] 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.

[0250] The ultraviolet shielding agent is preferably an ultraviolet shielding agent having a benzotriazole structure, an ultraviolet shielding agent having a benzophenone structure, an ultraviolet shielding agent having a triazine structure, or an ultraviolet shielding agent having a benzoate structure. The ultraviolet shielding agent is more preferably an ultraviolet shielding agent having a benzotriazole structure or an ultraviolet shielding agent having a benzophenone structure, and is further preferably an ultraviolet shielding agent having a benzotriazole structure.

[0251] As the ultraviolet shielding agent containing metal oxide, for example, zinc oxide, titanium oxide and cerium oxide can be mentioned. In addition, the surface of the ultraviolet shielding agent containing metal oxide can also be coated. As the coating material on the surface of the ultraviolet shielding agent containing metal oxide, insulating metal oxide, hydrolyzable organosilicon compound and polysiloxane compound can be mentioned.

[0252] 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.

[0253] 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. In terms of excellent performance in 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.

[0254] Examples of the ultraviolet shielding agent having a benzophenone structure include octoxynone ("Chimassorb 81" manufactured by BASF Corporation) and the like.

[0255] Examples of the ultraviolet shielding agent having a triazine structure include "LA-F70" manufactured by ADEKA and 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-[(hexyl)oxy]-phenol ("Tinuvinl577FF" manufactured by BASF).

[0256] 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.

[0257] 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).

[0258] 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-ethoxyphenyl) oxalic acid diamide, and 2-ethyl-2'-ethoxy-oxalic acid anilide ("Sanduvor VSU" manufactured by Clariant).

[0259] 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).

[0260] In the intermediate film 100% by weight or in the layer (first layer, second layer, third layer or colored layer) containing the ultraviolet shielding agent 100% by weight, the content of the ultraviolet shielding agent and the content of the benzotriazole compound are preferably 0.1% by weight or more, more preferably 0.2% by weight or more, further preferably 0.3% by weight or more, and particularly preferably 0.5% by weight or more. In this case, the decrease in visible light transmittance over time can be further suppressed. In the intermediate film 100% by weight or in the layer (first layer, second layer, third layer or colored layer) containing the ultraviolet shielding agent 100% by weight, the content of the ultraviolet shielding agent and the content of the benzotriazole compound are preferably 2.5% by weight or less, more preferably 2% by weight or less, further preferably 1% by weight or less, and particularly preferably 0.8% by weight or less. In particular, by setting the content of the ultraviolet shielding agent to 0.2 wt % or more in 100 wt % of the layer containing the ultraviolet shielding agent, a decrease in the visible light transmittance of the interlayer film and the laminated glass over time can be significantly suppressed.

[0261] (Antioxidant)

[0262] The intermediate film preferably contains an antioxidant. The first layer preferably contains an antioxidant. The second layer preferably contains an antioxidant. The third layer preferably contains an antioxidant. The colored layer preferably contains an antioxidant. The antioxidant may be used alone or in combination of two or more.

[0263] 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.

[0264] The antioxidant is preferably a phenolic antioxidant or a phosphorus antioxidant.

[0265] 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-tri-(2 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)butyrate and bis(3-tert-butyl-4-hydroxy-5-methylphenylpropionate)ethylenebis(oxyethylene)ester, etc. One or more of these antioxidants are preferably used.

[0266] Examples of the phosphorus antioxidant include tridecyl phosphite, tri(tridecyl) phosphite, triphenyl phosphite, trisnonylphenyl 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-phenyloxy)(2-ethylhexyloxy)phosphite, etc. One or more of these antioxidants may be used.

[0267] Examples of commercially available antioxidants include "IRGANO X 245" manufactured by BASF, "IRGAFOS 168" manufactured by BASF, "IRGAF OS 38" manufactured by BASF, "Sumilizer BHT" manufactured by Sumitomo Chemical, "H-BHT" manufactured by Sakai Chemical Industries, Ltd., and "IRGANOX 1010" manufactured by BASF.

[0268] In order to maintain the high visible light transmittance of the interlayer film and the laminated glass for a long time, the content of the antioxidant in 100% by weight of the interlayer film or in 100% by weight of the layer (first layer, second layer, third layer or colored layer) containing the antioxidant is preferably 0.03% by weight or more, and more preferably 0.1% by weight or more. In addition, since the effect of adding the antioxidant will be saturated, the content of the antioxidant in 100% by weight of the interlayer film or in 100% by weight of the layer containing the antioxidant is preferably 2% by weight or less.

[0269] (Other ingredients)

[0270] The intermediate film, the first layer, the second layer, the third layer and the colored layer may contain additives such as coupling agents, dispersants, surfactants, flame retardants, antistatic agents, adhesion regulators other than metal salts, moisture resistance agents, fluorescent whitening agents and infrared absorbers as needed. These additives may be used alone or in combination of two or more.

[0271] (Other details of interlayer films for laminated glass)

[0272] The distance between one end and the other end of the intermediate film is preferably 0.5 m or more, more preferably 0.8 m or more, particularly preferably 1 m or more, and preferably 3 m or less, more preferably 2 m or less, particularly preferably 1.5 m or less. When the intermediate film has a length direction and a width direction, the distance between one end and the other end is the distance in the length direction of the intermediate film. When the intermediate film has a square planar shape, the distance between one end and the other end is the distance between one end and the other end opposite to each other.

[0273] The thickness of the intermediate film is not particularly limited. From the perspective of practical use and the perspective of sufficiently improving the penetration resistance and bending rigidity of the laminated glass, the thickness of the intermediate film is preferably 0.1 mm or more, more preferably 0.25 mm or more, preferably 3 mm or less, more preferably 1.5 mm or less. When the thickness of the intermediate film is above the lower limit, the penetration resistance and bending rigidity of the laminated glass are further improved. When the thickness of the intermediate film is below the upper limit, the transparency of the intermediate film and the laminated glass is further improved.

[0274] The thickness of the interlayer film is set to T. In the case of a multilayer interlayer film, from the viewpoint of making it more difficult to generate voids at the ends of the laminated glass and further suppressing the reduction in the transparency of the laminated glass, the thickness of the first layer (preferably the thickness of the non-colored portion) is preferably 0.0625T or more, more preferably 0.1T or more, and preferably 0.375T or less, more preferably 0.25T or less.

[0275] The thickness of each of the second layer and the third layer (preferably the thickness at the non-colored portion) is preferably 0.3125T or more, more preferably 0.375 or more, further preferably 0.625T or more, particularly preferably 0.75T or more, preferably 0.9375T or less, and more preferably 0.9T or less. When the thickness of each of the second layer and the third layer (preferably the thickness at the non-colored portion) is above the lower limit and below the upper limit, voids are less likely to occur in the end of the laminated glass, and the reduction in the transparency of the laminated glass can be further suppressed. In addition, when the thickness of each of the second layer and the third layer is above the lower limit and below the upper limit, the leakage of the plasticizer can be suppressed.

[0276] From the viewpoint of making it more difficult to generate voids at the end of the laminated glass, when the interlayer film includes the second layer and the third layer, the total thickness of the second layer and the third layer (preferably the thickness of the non-colored portion) is preferably 0.625T or more, more preferably 0.75T or more, and preferably 0.9375T or less, more preferably 0.9T or less. In addition, when the total thickness of the second layer and the third layer is greater than the lower limit and less than the upper limit, the bleeding of the plasticizer can be suppressed.

[0277] The intermediate film may be an intermediate film with uniform thickness or an intermediate film with variable thickness. The cross-sectional shape of the intermediate film may be a rectangle or a wedge.

[0278] The interlayer film may be wound to form a roll of the interlayer film. The roll may include a core and the interlayer film wound around the outer circumference of the core.

[0279] There is no particular limitation on the method for producing the intermediate film. When the intermediate film is a single-layer intermediate film, a method of extruding a resin composition using an extruder can be cited. When the intermediate film is a multilayer intermediate film, for example, a method of laminating the obtained layers after forming each layer using each resin composition used to form each layer can be cited. In addition, as the method for producing the intermediate film, a method of laminating each layer by co-extruding each resin composition used to form each layer using an extruder can be cited. Since it is suitable for continuous production, the extrusion molding method is preferred.

[0280] From the perspective of excellent manufacturing efficiency of the interlayer film, the second layer and the third layer preferably contain the same polyvinyl acetal resin. From the perspective of excellent manufacturing efficiency of the interlayer film, it is more preferred that the second layer and the third layer contain the same polyvinyl acetal resin and the same plasticizer. From the perspective of excellent manufacturing efficiency of the interlayer film, it is further preferred that the second layer and the third layer are formed of the same resin composition.

[0281] The intermediate film preferably has a concavo-convex shape on at least one of the two side surfaces. The intermediate film more preferably has a concavo-convex shape on the two side surfaces. There is no particular limitation on the method for forming the concavo-convex shape, and examples thereof include a lip embossing method, an embossing roller method, a calendering roller method, and a profile extrusion method. From the perspective of being able to quantitatively form a constant concavo-convex pattern, i.e., embossing of a plurality of concavo-convex shapes, the embossing roller method is preferred.

[0282] (Laminated glass)

[0283] The laminated glass of the present invention comprises: a first laminated glass component, a second laminated glass component, and the interlayer film for laminated glass. In the laminated glass of the present invention, the interlayer film for laminated glass is arranged between the first laminated glass component and the second laminated glass component.

[0284] Figure 3 It is a schematic representation of the use of Figure 1 FIG. 1 is a cross-sectional view showing an example of a laminated glass including an interlayer film for a laminated glass.

[0285] Figure 3 The laminated glass 21 shown includes a first laminated glass component 31, a second laminated glass component 32, and an intermediate film 1. The intermediate film 1 is disposed and sandwiched between the first laminated glass component 31 and the second laminated glass component 32. The first laminated glass component 31 is laminated on a first surface (one surface) of the intermediate film 1. The second laminated glass component 32 is laminated on a second surface (the other surface) of the intermediate film 1 opposite to the first surface. The first laminated glass component 31 is laminated on the outer surface of the second layer 12 in the intermediate film 1. The second laminated glass component 32 is laminated on the outer surface of the third layer 13 in the intermediate film 1.

[0286] Figure 4 It is a schematic representation of the use of Figure 2 The illustrated interlayer film for laminated glass is a cross-sectional view of an example of laminated glass.

[0287] Figure 4 The laminated glass 21A shown in the figure includes: a first laminated glass component 31A, a second laminated glass component 32A, and an intermediate film 1A. The intermediate film 1A is provided and sandwiched between the first laminated glass component 31A and the second laminated glass component 32A. The first laminated glass component 31A is laminated on a first surface (one surface) of the intermediate film 1A. The second laminated glass component 32A is laminated on a second surface (the other surface) of the intermediate film 1A opposite to the first surface.

[0288] Thus, the laminated glass of the present invention comprises: a first laminated glass component, a second laminated glass component, and an interlayer film, wherein the interlayer film is the interlayer film for laminated glass of the present invention. In the laminated glass of the present invention, the interlayer film is arranged between the first laminated glass component and the second laminated glass component.

[0289] The first laminated glass component is preferably a first glass plate. The second laminated glass component is preferably a second glass plate.

[0290] 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 an intermediate film sandwiched between two glass plates, but also laminated glass with an intermediate film 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.

[0291] As the glass plate, inorganic glass and organic glass can be cited. As the inorganic glass, float glass, heat absorbing glass, heat reflecting glass, polished glass, embossed glass, wired glass, and green glass can be cited. The organic glass is a synthetic resin glass used to replace inorganic glass. As the organic glass, polycarbonate plate and poly (meth) acrylic resin plate can be cited. As the poly (meth) acrylic resin plate, poly (methyl) acrylate plate can be cited.

[0292] The thickness of each of the first laminated glass component and the second laminated glass component is preferably 1 mm or more, 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, more preferably 0.7 mm or more, 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.

[0293] The manufacturing method of the laminated glass is not particularly limited. First, an intermediate film is sandwiched between the first laminated glass component and the second laminated glass component to obtain a laminate. Then, for example, the obtained laminate is passed through a pressing roller or placed in a rubber bag for decompression and suction, thereby exhausting the air remaining between the first laminated glass component, the second laminated glass component and the intermediate film. Thereafter, pre-bonding is performed at about 70°C to 110°C to obtain a pre-pressed laminate. Then, the pre-pressed laminate is placed in an autoclave or pressed and pressed at a pressure of about 120°C to 150° and 1MPa to 1.5MPa. In this way, laminated glass can be obtained.

[0294] The intermediate film and the laminated glass can be used in automobiles, railway vehicles, airplanes, ships, buildings, etc. The intermediate film and the laminated glass can be used for other purposes. The intermediate film and the laminated glass are preferably intermediate films and laminated glasses for vehicles or buildings, and more preferably intermediate films and laminated glasses for vehicles. The intermediate film and the laminated glass can be used for windshields, side glasses, rear glasses or sunroof glasses, backlight glasses, etc. of automobiles. The intermediate film and the laminated glass are suitable for automobiles. The intermediate film is suitable for obtaining laminated glass for automobiles.

[0295] The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited to the Examples used.

[0296] In the polyvinyl acetal resin used, n-butyraldehyde having 4 carbon atoms was used for acetalization. The degree of acetalization (butyralization degree), degree of acetylation and hydroxyl content of the polyvinyl acetal resin were measured by a method based on JIS K 6728 "Testing methods for polyvinyl butyral". It should be noted that when measured by ASTM D1396-92, the same values ​​as those of the method based on JIS K6728 "Testing methods for polyvinyl butyral" were shown.

[0297] Prepare the following materials.

[0298] (Colorant)

[0299] Anthraquinone dye (color index: SB38)

[0300] Anthraquinone dye (color index: SB45)

[0301] Anthraquinone dye (color index: SB97)

[0302] Anthraquinone dye (color index: SB104)

[0303] Anthraquinone dyes (color index: DV28)

[0304] Anthraquinone dyes (color index: SR111)

[0305] Anthraquinone dye (color index: SY163)

[0306] Perylene Dye (Color Index: SR135)

[0307] Perylene Dye (Color Index: SR179)

[0308] Phthalocyanine dye (color index: SB70)

[0309] Quinoline dye (color index: SY33)

[0310] Quinoline dye (color index: DY54)

[0311] Other dyes (color index: SR118)

[0312] Other dyes (color index: SR160)

[0313] Azo dyes (color index: SY16)

[0314] Azo dyes (color index: SY21)

[0315] Azo dyes (color index: SO62)

[0316] Isoindolone Pigment (Color Index: PY110)

[0317] Azo Pigments (Color Index: PY93)

[0318] Azo Pigments (Color Index: PY150)

[0319] It should be noted that the “other dyes” mentioned above refer to dyes different from the three dyes of anthraquinone dyes, pyrone dyes and quinoline dyes.

[0320] (Light Stabilizer)

[0321] Tinuvin 765 (manufactured by BASF, hindered amine light stabilizer, NC (carbon atom) type)

[0322] (Thermoplastic resin)

[0323] 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%)

[0324] (Plasticizer)

[0325] Triethylene glycol di-2-ethylhexanoate (3GO)

[0326] (Metal Salt M)

[0327] Mg mixture (50:50 (weight ratio) mixture of magnesium 2-ethylbutyrate and magnesium acetate)

[0328] (UV shielding agent)

[0329] Tinuvin 326 (2-(2'-hydroxy-3'-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" manufactured by BASF)

[0330] (Antioxidant)

[0331] BHT (2,6-di-tert-butyl-p-cresol)

[0332] IRGANOX 1010 ("IRGANOX 1010" manufactured by BASF)

[0333] (Example 1)

[0334] Preparation of the composition for forming the intermediate film:

[0335] The following components were mixed and kneaded thoroughly with a mixing roll to obtain a composition for forming an interlayer film.

[0336] 100 parts by weight of polyvinyl butyral resin

[0337] 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO)

[0338] The metal salt M (Mg mixture) was present in an amount of 70 ppm in the obtained interlayer film.

[0339] The amount of the antioxidant (BHT) in the obtained interlayer film was 0.2 wt %.

[0340] The amount of the ultraviolet shielding agent (Tinuvin 326) in the obtained interlayer film was 0.2 wt %.

[0341] The anthraquinone dye (color index: SB104) was present in an amount of 0.072 wt % in the obtained interlayer film.

[0342] The amount of pyrone dye (color index: SR179) in the obtained interlayer film was 0.027 wt %.

[0343] The amount of quinoline dye (color index: SY33) in the obtained interlayer film was 0.007 wt %.

[0344] Preparation of intermediate film:

[0345] The composition for forming an interlayer was extruded using an extruder to prepare a single-layer interlayer film (thickness 800 μm) having only the first layer. The obtained interlayer film had only a colored portion that was colored in a plan view.

[0346] (Examples 2 to 48 and Comparative Examples 1 to 11)

[0347] A single-layer interlayer film (thickness 800 μm) was prepared in the same manner as in Example 1 except that the types and contents of the mixed components were changed as shown in Tables 1 to 12. It should be noted that the metal salt M was used in the same type and mixing amount as in Example 1. It should be noted that the contents of pigment 3 and pigment 4 in "content of colorant in interlayer film" in Comparative Examples 4, 5, 10, and 11 represent the total amount of pigment 3 and pigment 4.

[0348] (evaluate)

[0349] (1) Weather resistance

[0350] The obtained interlayer film was cut into 6.5 cm in length and 5 cm in width. Next, the interlayer film was sandwiched between two transparent glasses (6.5 cm in length, 5 cm in width, and 2.5 mm in thickness) and vacuum pressed by a vacuum laminator at 90° C. for 30 minutes to obtain laminated glass.

[0351] The following was performed using "SX75" manufactured by SUGA TEST INSTRUMENTS.

[0352] The main surface of one side of the obtained laminated glass is set as the light source (xenon lamp) side, and the laminated glass is set at 260mm to 270mm from the light source. It should be noted that the laminated glass is fixed to the sample fixing fixture in such a way that the end of one side of the laminated glass is exposed. For the main surface of the fixed laminated glass on the one side, irradiation is performed for 500 hours at a radiation illuminance of 60W / m under the conditions of black panel temperature of 63°C, tank internal temperature of 50°C and humidity of 50%RH. 2 The xenon light (irradiance measurement wavelength: 300 nm to 400 nm) was used to irradiate the laminated glass.

[0353] For the laminated glass before and after light irradiation, a spectrophotometer (HIT ACHIHIGH-TECH "U-4100") was used to obtain the color change before and after irradiation based on JIS K8781-4:2013 using the color difference ΔE. It should be noted that the measurement was performed at the center of the laminated glass. Based on the color difference ΔE, the weather resistance was determined according to the following criteria.

[0354] [Weather resistance criteria]

[0355] ○○: ΔE is 3 or less

[0356] ○: ΔE is more than 3 and less than 10

[0357] ×: ΔE exceeds 10

[0358] The details and results are shown in the following Tables 1 to 12. In addition, the description of the metal salt M is omitted in the table.

[0359] [Table 1]

[0360]

[0361]

[0362] [Table 3]

[0363]

[0364]

[0365] [Table 5]

[0366]

[0367]

[0368] [Table 7]

[0369]

[0370]

[0371] [Table 9]

[0372]

[0373]

[0374] [Table 11]

[0375]

[0376] In the table, the thermoplastic resin used is polyvinyl acetal resin, and the plasticizer used is triethylene glycol di-2-ethylhexanoate.

[0377] In addition, in the composition used in Example 22, a composition in which the content of the colorant was changed as follows was used as a material for the colored layer, and a composition equivalent to Figure 1 The intermediate film and the equivalent Figure 3It should be noted that the content of the colorant in 100 wt % of the colored portion is the same as the content of the colorant in the interlayer film shown in Example 22.

[0378] The amount of anthraquinone dye in the coloring layer is 1.074 wt % (color index: SB45)

[0379] Perylene dye (color index: SR179) in an amount of 0.080% by weight in the coloring layer

[0380] Quinoline dye (color index: PY93) in an amount of 0.240 wt% in the coloring layer

[0381] It was confirmed that the obtained laminated glass was excellent in weather resistance and in suppression of bubbling at the edge of the laminated glass.

[0382] Explanation of symbols

[0383] 1. 1A…Intermediate film

[0384] 11, 11A…1st floor

[0385] 12…Second floor

[0386] 13…Third floor

[0387] 14, 14A…Coloring layer

[0388] 21, 21A…Laminated glass

[0389] 31, 31A…First laminated glass component

[0390] 32, 32A…Second laminated glass component

[0391] X…Colored area

[0392] Y…Non-colored area

Claims

1. An interlayer film for laminated glass, comprising a colored layer containing an anthraquinone dye and a pyrone dye, wherein the weight ratio of the content of the anthraquinone dye to the content of the pyrone dye in the colored layer is 0.072 / 0.027 or more and 60 or less, and the colored layer further contains an azo pigment or a quinoline dye. 2 . The interlayer film for laminated glass according to claim 1 , comprising a light stabilizer.

3. The interlayer film for laminated glass according to claim 2, wherein: The light stabilizer is a light stabilizer having a carbon atom bonded to a nitrogen atom of a piperidine structure. The interlayer film for laminated glass according to claim 1 , comprising a thermoplastic resin. The interlayer film for laminated glass according to claim 4 , comprising a plasticizer.

6. The interlayer film for laminated glass according to claim 4, wherein The thermoplastic resin is polyvinyl acetal resin.

7. The interlayer film for laminated glass according to any one of claims 1 to 6, wherein The anthraquinone dye is a blue pigment.

8. The interlayer film for laminated glass according to claim 7, wherein The anthraquinone dye is a compound represented by the following formula (X1): In the formula (X1), R 1-1 , R 1-2 , R 2-1 and R 2-2 Each independently represents a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group or a thiol group.

9. The interlayer film for laminated glass according to claim 7, wherein The content of the anthraquinone dye in 100 wt % of the colored layer is 0.300 wt % or more and 2.5 wt % or less.

10. The interlayer film for laminated glass according to claim 7, wherein The pyrene ketone dye is a red pigment.

11. The interlayer film for laminated glass according to claim 10, wherein The pyrene ketone dye is a compound represented by the following formula (Y1), In the formula (Y1), R1 and R2 are each independently a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group, a thiol group, or a condensed ring structure of a 5-membered ring or a 6-membered ring, In the formula (Y1), R3 and R4 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, an amino group, a hydroxyl group, an alkoxy group, a halogen atom, a sulfonyl group or a thiol group.

12. The interlayer film for laminated glass according to claim 10, wherein The content of the pyrene dye in 100 wt % of the colored layer is 0.020 wt % or more and 0.380 wt % or less. 13 . The interlayer film for laminated glass according to claim 10 , comprising a yellow pigment as a colorant different from both the anthraquinone dye and the pyrene dye.

14. The interlayer film for laminated glass according to claim 13, wherein The yellow pigment is the azo pigment or the quinoline dye.

15. A laminated glass comprising: 1st laminated glass component, a second laminated glass component, and The interlayer film for laminated glass according to any one of claims 1 to 14, The interlayer film for laminated glass is arranged between the first laminated glass component and the second laminated glass component.

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