JPH07330389A - Intermediate membrane for laminated glass and laminated glass - Google Patents

Abstract

PURPOSE:To provide an intermediate membrane excellent in both light-resistance and ultraviolet-shielding performance by using an ethylene-vinyl acetate copolymer, and the laminated glass using the same. CONSTITUTION:This intermediate membrane for laminated glass mainly comprises an ethylene-vinyl acetate copolymer wherein the membrane contains a benzotriakole ultraviolet absorber absorbing the light of 380mmu or less wavelength, a benzophenone ultraviolet absorber for 340-mmu and/or a salicylic absorber. This laminated glass is given by placing this intermediate membrane between two sheets of transparent glass.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlayer film for laminated glass and a laminated glass, which is composed of a resin film containing an ethylene-vinyl acetate copolymer as a main component.

[0002]

2. Description of the Related Art As an interlayer film for laminated glass, a polyvinyl butyral interlayer film containing a plasticizer is widely used. This type of polyvinyl butyral interlayer film is tough, and is excellent in terms of adhesion and transparency, but it still has problems in that the interlayer film tends to block, it tends to absorb moisture, and the plasticizer tends to bleed. is there.

As an interlayer film and a laminated glass with the above-mentioned drawbacks improved, Japanese Patent Publication No. 47-2103 discloses a resin of a specific component obtained by partially esterifying a partially saponified ethylene-vinyl acetate copolymer with phthalic anhydride. There is disclosed a technique in which an intermediate film is formed by using, the intermediate film is interposed between glass plates, and this is integrated by heating and pressurizing it with a press or the like to form a laminated glass.

Further, Japanese Patent Publication No. 2-53381 discloses that
An ethylene-vinyl acetate copolymer is mixed with an organic peroxide and a silane coupling agent to form a thermally crosslinkable intermediate film, which is interposed between glass plates and heated and pressed in an autoclave. Thus, a technique is disclosed in which the interlayer film is thermally crosslinked and integrated to form a laminated glass.

[0005]

However, in the laminated glass described in Japanese Patent Publication No. 47-2103, the interlayer film is inferior in light resistance, and the interlayer film turns yellow when used for a long period of time. Further, the laminated glass described in Japanese Patent Publication No. 2-53381 has excellent light resistance of the interlayer film, but the interlayer film is inferior in ultraviolet blocking property, and furniture placed indoors by sunlight passing through the laminated glass. However, there is a drawback that the articles such as the above will fade.

The present invention solves the above problems, and an object of the present invention is to provide a resin containing an ethylene-vinyl acetate copolymer as a main component, which is excellent in both the light resistance and the ultraviolet ray blocking property. An object of the present invention is to provide an intermediate film for laminated glass and a laminated glass which are made of a film.

[0007]

In the present invention, the interlayer film for laminated glass according to claim 1 is an interlayer film for laminated glass comprising a resin film containing an ethylene-vinyl acetate copolymer as a main component, The resin film has an absorption wavelength range of 3
A benzotriazole-based UV absorber having a particle size of 80 mμ or less,
A benzophenone-based UV absorber and / or a salicylic acid-based UV absorber having an absorption wavelength range of 340 mμ or less are contained.

The interlayer film for laminated glass according to claim 2,
The resin film containing the ethylene-vinyl acetate copolymer as a main component comprises an ethylene-vinyl acetate copolymer, a dibenzylidene sorbitol compound represented by the following general formula (I), an amino group, a glycidyl group, and a mercapto. A silane coupling agent having at least one functional group selected from the group consisting of groups.

[0009]

[Chemical 3] (In the formula, R ¹ and R ² represent a hydrogen atom, a chlorine atom or an alkyl group having 1 to 6 carbon atoms, and R ¹ and R ² may be the same or different.)

The interlayer film for laminated glass according to claim 3 is an interlayer film for laminated glass comprising at least two layers consisting of resin films A and B containing ethylene-vinyl acetate copolymer as a main component. The resin film A has an absorption wavelength range of 38.
A benzotriazole-based UV absorber of 0 mμ or less is contained, and the resin film B contains a benzophenone-based UV absorber and / or a salicylic acid-based UV absorber having an absorption wavelength range of 340 mμ or less, and at least one outermost layer. Is made of a resin film B.

The interlayer film for laminated glass according to claim 4 is
The resin films A and B containing the above ethylene-vinyl acetate copolymer as a main component respectively contain an ethylene-vinyl acetate copolymer, a dibenzylidene sorbitol compound represented by the following general formula (I), and an amino group. And a silane coupling agent having at least one functional group selected from the group consisting of a glycidyl group and a mercapto group.

[0012]

[Chemical 4] (In the formula, R ¹ and R ² represent a hydrogen atom, a chlorine atom or an alkyl group having 1 to 6 carbon atoms, and R ¹ and R ² may be the same or different.)

Further, the laminated glass according to claim 5 is
The interlayer film for laminated glass is sandwiched between at least two transparent glass plates.

In the present invention, the resin film containing ethylene-vinyl acetate copolymer as a main component is, for example, a resin film made of ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer.
Resin film made of modified vinyl acetate copolymer, resin film made of ethylene-vinyl acetate copolymer, organic peroxide and silane coupling agent, etc. The resin film used for the film is used.

In the present invention, at least one selected from the group consisting of an ethylene-vinyl acetate copolymer, a dibenzylidene sorbitol compound represented by the following general formula (I), an amino group, a glycidyl group and a mercapto group. It is preferable to use a resin film composed of a silane coupling agent having one kind of functional group in terms of transparency and adhesiveness.

[0016]

[Chemical 5] (In the formula, R ¹ and R ² represent a hydrogen atom, a chlorine atom or an alkyl group having 1 to 6 carbon atoms, and R ¹ and R ² may be the same or different.)

Here, if the melt index (MI) of the ethylene-vinyl acetate copolymer is too small, the fluidity of the resin is lowered to make film formation difficult, and if it is too large, the viscosity is lowered and adhesion to glass is caused. Since the force decreases, it is preferably 0.1 to 500 g / 10 minutes, more preferably 1
~ 200 g / 10 minutes.

The above-mentioned dibenzylidene sorbitol compound is blended in order to improve the transparency of the interlayer film, and if the carbon number of the alkyl group is too large, the transparency of the interlayer film for laminated glass is lowered, so that 1 Limited to ~ 6.

Examples of such dibenzylidene sorbitol compounds include dibenzylidene sorbitol,
Bis (dimethylbenzylidene) sorbitol, bis (diethylbenzylidene) sorbitol, bis (dipropylbenzylidene) sorbitol, bis (dibutylbenzylidene) sorbitol, bis (dipentylbenzylidene)
Examples thereof include sorbitol, bis (dihexylbenzylidene) sorbitol, bis (dichlorobenzylidene) sorbitol and the like. These may be used alone or in combination of two or more.

If the blending amount of the above-mentioned dibenzylidene sorbitol compound is too small, the transparency of the interlayer film will decrease, and if it is too large, the tensile strength of the interlayer film will decrease, so that it is relative to 100 parts by weight of the ethylene-vinyl acetate copolymer. 0.01
-4 parts by weight is preferred.

In addition to the above-mentioned dibenzylidene sorbitol compound, for example, tribenzylidene sorbitol,
Sodium bis (4-t-butylphenyl) phosphate, hydroxy-di (t-butylbenzoic acid) aluminum and the like may be used together within a range that does not impair the physical properties of the interlayer film for laminated glass.

The silane coupling agent is added to improve the adhesion between the interlayer film and the glass, and one or more functional groups selected from the group consisting of amino group, glycidyl group and mercapto group. Has a group.

Examples of the silane coupling agent include N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane and N- (2-aminoethyl) -3.
-Aminopropyltrimethoxysilane, 3-aminopropyldimethylethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-
Glycidoxypropyldimethylethoxysilane, (3-
Glycidoxypropyl) methyldiethoxysilane, 3-
Glycidoxypropyltrimethoxysilane, mercaptomethyldimethylethoxysilane, (mercaptomethyl)
Examples thereof include methyldiethoxysilane, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, and 3-mercaptopropyltriethoxysilane. These may be used alone or in combination of two or more.

If the blending amount of the above silane coupling agent is too small, the adhesiveness between the interlayer film and the glass will decrease, and if it is too large, the transparency of the interlayer film will decrease, so 100 parts by weight of the ethylene-vinyl acetate copolymer is used. It is preferably 0.01 to 4 parts by weight with respect to parts.

According to the present invention, a benzotriazole-based ultraviolet absorber having an absorption wavelength range of 380 mμ or less and a benzophenone having an absorption wavelength range of 340 mμ or less are formed on the resin film containing the ethylene-vinyl acetate copolymer as a main component. System ultraviolet absorber and / or salicylic acid type ultraviolet absorber.

Examples of the benzotriazole type ultraviolet absorber having an absorption wavelength range of 380 mμ or less include 2- (2 '
-Hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-5'-t-butylphenyl) benzotriazole, 2- (2'-hydroxy-
3 ', 5'-di-t-butylphenyl) benzotriazole, 2- (2'-hydroxy-3'-t-butyl-
5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5-chlorobenzotriazole, 2-
(2′-hydroxy-3 ′, 5′-di-t-amylphenyl) benzotriazole, 2- [2′-hydroxy-
3 '-(3 ", 4", 5 ", 6" -tetrahydrophthalimidomethyl) -5'-methylphenyl] benzotriazole, 2,2-methylenebis [4- (1,1,3,3)
-Tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol] and the like. These may be used alone or in combination of two or more. These ultraviolet absorbers generally have an absorption wavelength range of 270 to 380 mμ.

Examples of the benzophenone type ultraviolet absorber having an absorption wavelength range of 340 mμ or less include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone and 2-hydroxy. -4-dodecyloxybenzophenone, bis (2-methoxy-4-hydroxy-
5-benzoylphenyl) methane, 2-hydroxy-4
-Methoxybenzophenone-5-sulphonic acid and the like can be mentioned. These may be used alone or in combination of two or more. These ultraviolet absorbers generally have an absorption wavelength range of 280 to 340 mμ.

Examples of salicylic acid-based ultraviolet absorbers having an absorption wavelength range of 340 mμ or less include phenyl salicylate and p.
Examples thereof include -t-butylphenyl salicylate and p-octylphenyl salicylate, which may be used alone or in combination of two or more kinds. These ultraviolet absorbers generally have an absorption wavelength range of 290 to 330.
mμ.

The interlayer film for laminated glass of the present invention may be mixed with known additives such as a heat stabilizer and an antioxidant, if necessary. Examples of the heat stabilizer include calcium stearate, dialkanol aliphatic tertiary amine and the like. Antioxidants include t-butylhydroxytoluene, tetrakis- [methylene-3- (3'-
5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane and the like.

In order to produce the interlayer film for laminated glass of the present invention, any conventionally known molding technique is adopted. For example, one layer of the interlayer film is the above-mentioned ethylene-vinyl acetate copolymer and other desired blends. It is manufactured by a method in which the agents are mixed and the mixture is melt-kneaded by an extruder and extruded into a sheet shape, or a method in which the mixture is melt-kneaded by a roll and formed into a sheet shape.

The intermediate film of at least two layers may be formed by integrally extruding into a sheet by a multi-layer extrusion method, by separately forming intermediate films and then heating and pressurizing them to integrally form them, or separately. It is manufactured by a method in which the molded interlayer film is laminated between transparent glasses, heated and pressed, and integrally molded at the same time when the laminated glass is manufactured.

When the interlayer film for laminated glass of the present invention is composed of a resin film as a single layer, this resin film has an absorption wavelength range of 3
A benzotriazole-based UV absorber having a particle size of 80 mμ or less,
Both a benzophenone-based UV absorber having an absorption wavelength range of 340 mμ or less and / or a salicylic acid-based UV absorber are mixed.

When the interlayer film for laminated glass of the present invention is composed of at least two layers of the resin films A and B, the resin film A is mixed with a benzotriazole type ultraviolet absorber having an absorption wavelength range of 380 mμ or less, The resin film B is mixed with a benzophenone-based UV absorber and / or a salicylic acid-based UV absorber having an absorption wavelength range of 340 mμ or less.

Then, at least one outermost layer is laminated so as to become the resin film B. For example, a two-layer structure of resin film B / resin film A or a three-layer structure of resin film B / resin film A / resin film B is used. The reason why at least one outermost layer is laminated so as to be the resin film B is that it can be used so that sunlight enters from the resin film B side of the outermost layer, and thus the light resistance of the intermediate film can be improved. Because. If it is used so that sunlight enters from the resin film A side, the light resistance of the intermediate film cannot be improved.

In any of the above layer constitutions, it is preferable that the ultraviolet absorbent is mixed with 0.01 to 3 parts by weight of the entire ultraviolet absorbent with respect to 100 parts by weight of the entire resin, and more preferably 0.1. It is from 05 to 1 part by weight. The ratio between the benzotriazole-based UV absorber having an absorption wavelength range of 380 mμ or less and the benzophenone-based UV absorber and / or salicylic acid type UV absorber having an absorption wavelength range of 340 mμ or less is arbitrary, but generally an approximately equal amount is preferable. Is.

To produce a laminated glass using the interlayer film for laminated glass of the present invention, for example, a transparent inorganic glass plate such as float glass or a transparent organic glass plate such as polycarbonate or polymethylmethacrylate is used. This sandwich is put in a rubber bag with a membrane interposed therein, deaerated at a vacuum degree of about 20 torr or less for a certain period of time, and then transferred to an oven at about 80 to 120 ° C. in the deaerated state and kept at this temperature for a certain period of time. Thus, the method of adhering the glass plate and the intermediate film is adopted.

The above sandwich was heated to about 100 ° C.
About 80 to 1 after passing through the pressure rubber roll of
It is also possible to adopt a method in which the glass plate and the interlayer film are adhered to each other by transferring them to an oven at 20 ° C. and holding at this temperature for a certain period of time.

[0038]

An intermediate film for laminated glass comprising a resin film containing an ethylene-vinyl acetate copolymer as a main component, wherein the resin film has a benzotriazole-based ultraviolet absorber having an absorption wavelength range of 380 mμ or less and an absorption wavelength. When both a benzophenone-based UV absorber and / or a salicylic acid-based UV absorber having an area of 340 mμ or less are contained, the action of the benzotriazole-based UV absorber improves the UV-cutting property of the interlayer film, and the benzophenone-based UV absorber is improved. The light resistance of the interlayer film is improved by the action of the absorber and / or the salicylic acid-based ultraviolet absorber.

An intermediate film for laminated glass comprising at least two layers of resin films A and B containing an ethylene-vinyl acetate copolymer as a main component, wherein the resin film A has an absorption wavelength range of 380 mμ or less. A benzotriazole-based ultraviolet absorber is contained, and the resin film B has an absorption wavelength range of 340.
When a benzophenone-based UV absorber and / or a salicylic acid-based UV absorber of mμ or less is contained, and at least one of the outermost layers is composed of the resin film B, sunlight is incident on the resin film B side of the outermost layer. When used for, first, the light resistance of the interlayer film is improved by the action of the benzophenone-based ultraviolet absorber and / or the salicylic acid-based ultraviolet absorber, and then the ultraviolet cut property of the interlayer film is improved by the action of the benzotriazole-based ultraviolet absorber. To be done.

[0040]

EXAMPLES Next, examples and comparative examples of the present invention will be described. Example 1 (1) Production of interlayer film for laminated glass Vinyl acetate content 32% by weight, melt index (M
I) 100 parts by weight of 60 g / 10 min ethylene-vinyl acetate copolymer (Evatate 5011: manufactured by Sumitomo Chemical Co., Ltd.),
0.2 parts by weight of dibenzylidene sorbitol (Gelol D: manufactured by Shin Nippon Rika Co., Ltd.), N- (2-aminoethyl) -3
-Aminopropylmethyldimethoxysilane (manufactured by Chisso Corporation) 0.2 parts by weight, 2- (2'-hydroxy-3'-t
-Butyl-5'-methylphenyl) -5-chlorobenzotriazole (absorption wavelength range 270 to 380 mμ) (Sumisorb 300: Sumitomo Chemical Co., Ltd.) 0.2 parts by weight, 2-hydroxy-4-octoxybenzophenone (absorption wavelength) Area 2
80 to 340 mμ) (Sumisorb 130: manufactured by Sumitomo Chemical Co., Ltd.) 0.2 part by weight is supplied to a roll mill and the temperature is 200 ° C.
Was melt-kneaded to obtain a resin composition.

The resin composition thus obtained was sandwiched between two polyethylene terephthalate films having a thickness of 0.1 mm, and this was pressed by a press molding machine at 150 ° C. and 120 kg / cm ² for 3 times.
Press-molded for 0 minutes, cooled to room temperature, and made to have a thickness of 0.
An interlayer film for laminated glass was obtained in which a polyethylene terephthalate film was laminated on both surfaces of a 4 mm interlayer film. This interlayer film for laminated glass has excellent transparency, adhesiveness, blocking resistance, and moisture resistance.

(2) Production of laminated glass The polyethylene terephthalate film was peeled off from the interlayer film for laminated glass, and the polyethylene terephthalate film was sandwiched between two transparent float glasses each having a length of 30 cm, a width of 30 cm and a thickness of 3 mm. Place in a vacuum bag and evacuate for 20 minutes at a vacuum of 10 torr, then transfer to an oven while maintaining the evacuated state.
It hold | maintained at 30 degreeC for 30 minutes, and the laminated glass was obtained.

Example 2 In place of 0.2 parts by weight of 2 -hydroxy-4-octoxybenzophenone (Sumisorb 130: Sumitomo Chemical Co., Ltd.),
p-t-butylphenyl salicylate (absorption wavelength range 29
0-330mμ) (Sumisorb 90: Sumitomo Chemical Co., Ltd.)
0.2 parts by weight was compounded. Otherwise in the same manner as in Example 1, an interlayer film for laminated glass and a laminated glass were obtained.

Example 3 Production of Resin Film A Vinyl acetate content 32% by weight, melt index (M
I) 100 parts by weight of 60 g / 10 min ethylene-vinyl acetate copolymer (Evatate 5011: manufactured by Sumitomo Chemical Co., Ltd.),
0.2 parts by weight of dibenzylidene sorbitol (Gelol D: manufactured by Shin Nippon Rika Co., Ltd.), N- (2-aminoethyl) -3
-Aminopropylmethyldimethoxysilane (manufactured by Chisso Corporation) 0.2 parts by weight, 2- (2'-hydroxy-3'-t
-Butyl-5'-methylphenyl) -5-chlorobenzotriazole (Sumisorb 300: Sumitomo Chemical Co., Ltd.)
2 parts by weight were supplied to a roll mill and melt-kneaded at a temperature of 200 ° C. to obtain a resin composition.

The obtained resin composition was sandwiched between two sheets of polyethylene terephthalate film having a thickness of 0.1 mm, and this was pressed by a press molding machine at 150 ° C. and 120 kg / cm ² for 3 times.
Press molding was carried out for 0 minutes, and this was cooled to room temperature C to obtain a resin film A in which a polyethylene terephthalate film was laminated on both surfaces of a resin film having a thickness of 0.2 mm. This resin film A
Has excellent transparency, adhesiveness, blocking resistance, and moisture resistance.

Production of Resin Film B Vinyl acetate content 32% by weight, melt index (M
I) 100 parts by weight of 60 g / 10 min ethylene-vinyl acetate copolymer (Evatate 5011: manufactured by Sumitomo Chemical Co., Ltd.),
0.2 parts by weight of dibenzylidene sorbitol (Gelol D: manufactured by Shin Nippon Rika Co., Ltd.), N- (2-aminoethyl) -3
-Aminopropylmethyldimethoxysilane (manufactured by Chisso Corporation) 0.2 parts by weight, 2-hydroxy-4-octoxybenzophenone (Sumisorb 130: manufactured by Sumitomo Chemical Co., Ltd.)
2 parts by weight were supplied to a roll mill and melt-kneaded at a temperature of 200 ° C. to obtain a resin composition.

The obtained resin composition was sandwiched between two sheets of polyethylene terephthalate film having a thickness of 0.1 mm, and this was pressed by a press molding machine at 150 ° C. and 120 kg / cm ² for 3 times.
Press-molded for 0 minutes, cooled to room temperature, and made to have a thickness of 0.
A resin film B having a polyethylene terephthalate film laminated on both surfaces of a 2 mm resin film was obtained. This resin film B is excellent in transparency, adhesiveness, blocking resistance, and moisture resistance.

(2) Production of interlayer film for laminated glass and laminated glass The polyethylene terephthalate film is peeled off from the resin film A and the resin film B, and resin film B / resin film A / resin film B
It is piled up in order, and this is 30 cm in length × 30 cm in width × thickness 3
It is sandwiched between two transparent float glass pieces (mm), placed in a vacuum bag and degassed for 20 minutes at a vacuum degree of 10 torr. Then, while keeping the degassed state, transfer it to an oven at 100 ° C.
Was held for 30 minutes, and the interlayer film for laminated glass and the laminated glass were simultaneously prepared.

Example 4 In the preparation of the resin film B, p-t-butylphenyl salicylate (Sumisorb 90) was used in place of 0.2 parts by weight of 2-hydroxy-4-octoxybenzophenone (Sumisorb 130: Sumitomo Chemical Co., Ltd.). (Sumitomo Chemical Co., Ltd.) 0.2 part by weight was blended. Except for this, the interlayer film for laminated glass and the laminated glass were simultaneously prepared in the same manner as in Example 3.

Comparative Example 1 0.2 parts by weight of 2- (2'-hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole (Sumisorb 300, manufactured by Sumitomo Chemical Co., Ltd.) was added. An interlayer film for laminated glass and a laminated glass were obtained in the same manner as in Example 1, except that the laminated glass was not used.

Comparative Example 2 An interlayer film for laminated glass was prepared in the same manner as in Example 1 except that 0.2 part by weight of 2 -hydroxy-4-octoxybenzophenone (Sumisorb 130, manufactured by Sumitomo Chemical Co., Ltd.) was not added. And a laminated glass were obtained.

Comparative Example 3 As an interlayer film for laminated glass, Dumilan film F-
Same as Example 1 except that 100 (manufactured by Takeda Pharmaceutical Co., Ltd.) (intermediate film using resin of specific component obtained by partially esterifying partially saponified ethylene-vinyl acetate copolymer with phthalic anhydride) was used. To obtain a laminated glass.

Comparative Example 4 As an interlayer film for laminated glass, EVA Safe Film SG was used.
-14504 (manufactured by Bridgestone Corporation) (the same as in Example 1) except that an ethylene-vinyl acetate copolymer was mixed with an organic peroxide and a silane coupling agent to form a thermally crosslinkable interlayer film. To obtain laminated glass.

With respect to the laminated glass (n = 10) obtained in Examples 1 to 4 and Comparative Examples 1 to 4 above, the ultraviolet transmittance (Tw) was measured and the light resistance test was conducted by the following methods. The results are shown in Table 1.

Measurement of Ultraviolet Transmittance (Tw) The ultraviolet transmittance (Tw) was measured according to JIS R3106, and the solar transmittance (Tw) was used to calculate the ultraviolet transmittance (Tw).
w) was calculated.

Light resistance test A light resistance tester (Eye Super UV Tester: manufactured by Iwasaki Electric Co., Ltd.) was used to perform a test under the following conditions, and JIS K71 was used.
Based on No. 03, the difference in yellowness before and after irradiation, that is, the degree of yellowing (ΔYI) was evaluated. Black panel temperature 60 ± 3 ℃ Relative humidity 60 ± 3% RH UV intensity 100mW / cm ² Irradiation distance 240mm Without shower Irradiation time 200 hours

[0057]

[Table 1]

[0058]

As described above, in the interlayer film for laminated glass and laminated glass of the present invention, a resin film containing ethylene-vinyl acetate copolymer as a main component contains a specific ultraviolet absorber. Therefore, both the light resistance and the ability to block ultraviolet rays are excellent, the interlayer film is less likely to yellow due to long-term use, and furniture such as furniture placed indoors due to sunlight is less likely to fade. It is preferably used for vehicle window glass and building window glass.

Further, since the interlayer film for laminated glass of the present invention uses a resin film containing an ethylene-vinyl acetate copolymer as a main component, it has good transparency, adhesiveness, blocking resistance and moisture resistance, There is an advantage that the workability of the intermediate film and the workability of the alignment are also good.

Claims (5)

[Claims] 1. An intermediate film for laminated glass comprising a resin film containing an ethylene-vinyl acetate copolymer as a main component, comprising:
The resin film contains a benzotriazole-based ultraviolet absorber having an absorption wavelength range of 380 mμ or less and an absorption wavelength range of 340 m.
An interlayer film for laminated glass, which contains a benzophenone-based UV absorber and / or a salicylic acid-based UV absorber in an amount of μ or less. 2. A resin film containing an ethylene-vinyl acetate copolymer as a main component comprises an ethylene-vinyl acetate copolymer, a dibenzylidene sorbitol compound represented by the following general formula (I), an amino group, The interlayer film for laminated glass according to claim 1, comprising a silane coupling agent having at least one functional group selected from the group consisting of a glycidyl group and a mercapto group. [Chemical 1] (In the formula, R ¹ and R ² represent a hydrogen atom, a chlorine atom or an alkyl group having 1 to 6 carbon atoms, and R ¹ and R ² may be the same or different.) 3. An intermediate film for laminated glass comprising at least two layers comprising resin films A and B containing ethylene-vinyl acetate copolymer as a main component, wherein the resin film A has an absorption wavelength range of 380 mμ or less. The benzotriazole-based ultraviolet absorber of No. 3 is contained, and the resin film B has an absorption wavelength range of 340
An interlayer film for a laminated glass, which contains mμ or less of a benzophenone-based ultraviolet absorber and / or a salicylic acid-based ultraviolet absorber, and at least one outermost layer is a resin film B. 4. The resin films A and B containing an ethylene-vinyl acetate copolymer as a main component respectively contain an ethylene-vinyl acetate copolymer and a dibenzylidene sorbitol compound represented by the following general formula (I). And a silane coupling agent having at least one functional group selected from the group consisting of an amino group, a glycidyl group, and a mercapto group, The interlayer film for laminated glass according to claim 3, wherein [Chemical 2] (In the formula, R ¹ and R ² represent a hydrogen atom, a chlorine atom or an alkyl group having 1 to 6 carbon atoms, and R ¹ and R ² may be the same or different.) 5. A laminated glass comprising the interlayer film for laminated glass according to any one of claims 1 to 4 sandwiched between at least two transparent glass plates.