INTERLAYER FOR LAMINATED GLASS, INTERLAYER FOR LUMINESCENT LAMINATED GLASS, AND LAMINATED GLASS

Abstract

The first aspect of the present invention aims to provide an interlayer film for laminated glass, an interlayer film for luminescent laminated glass, and a laminated glass including the interlayer film for laminated glass which are significantly suppressed while containing an aromatic compound such as a salicylic acid compound or a benzophenone compound. The second aspect of the present invention aims to provide an interlayer film for laminated glass which enables display of high luminance images under irradiation with light and inhibits reduction in the luminance of images even after use for a long period of time, and a laminated glass including the interlayer film for laminated glass. The first aspect of the present invention relates to an interlayer film for laminated glass containing: a thermoplastic resin; an aromatic compound that has a structure capable of coordinating with a metal; and an antioxidant, the antioxidant being at least one antioxidant selected from the group consisting of a phenolic compound, a phosphoric acid compound, and a sulfur compound. The second aspect of the present invention relates to an interlayer film for laminated glass including a luminescent layer that contains a thermoplastic resin, a luminescent material having a terephthalic acid ester structure, and a benzotriazole ultraviolet absorber, the luminescent layer containing the benzotriazole ultraviolet absorber in an amount of 0.05 to 10 parts by weight based on 1 part by weight of the luminescent material having a terephthalic acid ester structure.

Claims

1. An interlayer film for laminated glass comprising: a thermoplastic resin; an aromatic compound that has a structure capable of coordinating with a metal; and an antioxidant, the antioxidant being at least one antioxidant selected from the group consisting of a phenolic compound, a phosphoric acid compound, and a sulfur compound.

2. The interlayer film for laminated glass according to claim 1, which contains the aromatic compound that has a structure capable of coordinating with a metal in an amount of 0.001 to 10 parts by weight based on 100 parts by weight of the thermoplastic resin.

3. The interlayer film for laminated glass according to claim 1, wherein the amount of the antioxidant is 0.05 to 400 parts by weight based on 1 part by weight of the aromatic compound that has a structure capable of coordinating with a metal.

4. An interlayer film for luminescent laminated glass comprising the interlayer film for laminated glass according to claim 1.

5. A laminated glass comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 1, interposed between the pair of glass sheets.

6. An interlayer film for laminated glass comprising a luminescent layer that contains a thermoplastic resin, a luminescent material having a terephthalic acid ester structure, and a benzotriazole ultraviolet absorber, the luminescent layer containing the benzotriazole ultraviolet absorber in an amount of 0.05 to 10 parts by weight based on 1 part by weight of the luminescent material having a terephthalic acid ester structure.

7. The interlayer film for laminated glass according to claim 6, wherein the amount of the benzotriazole ultraviolet absorber is 0.4 to 2 parts by weight based on 1 part by weight of the luminescent material having a terephthalic acid ester structure in the luminescent layer.

8. A laminated glass comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 6 interposed between the pair of glass sheets.

9. The interlayer film for laminated glass according to claim 2, wherein the amount of the antioxidant is 0.05 to 400 parts by weight based on 1 part by weight of the aromatic compound that has a structure capable of coordinating with a metal.

10. An interlayer film for luminescent laminated glass comprising the interlayer film for laminated glass according to claim 2.

11. An interlayer film for luminescent laminated glass comprising the interlayer film for laminated glass according to claim 3.

12. An interlayer film for luminescent laminated glass comprising the interlayer film for laminated glass according to claim 9.

13. A laminated glass comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 2, interposed between the pair of glass sheets.

14. A laminated glass comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 3, interposed between the pair of glass sheets.

15. A laminated glass comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 9, interposed between the pair of glass sheets.

16. A laminated glass comprising: a pair of glass sheets; and the interlayer film for luminescent laminated glass according to claim 4, interposed between the pair of glass sheets.

17. A laminated glass comprising: a pair of glass sheets; and the interlayer film for luminescent laminated glass according to claim 10, interposed between the pair of glass sheets.

18. A laminated glass comprising: a pair of glass sheets; and the interlayer film for luminescent laminated glass according to claim 11, interposed between the pair of glass sheets.

19. A laminated glass comprising: a pair of glass sheets; and the interlayer film for luminescent laminated glass according to claim 12, interposed between the pair of glass sheets.

20. A laminated glass comprising: a pair of glass sheets; and the interlayer film for laminated glass according to claim 7 interposed between the pair of glass sheets.

Description

DESCRIPTION OF EMBODIMENTS

[0173] The first aspect of the present invention is specifically described in the following with reference to, but not limited to, examples.

EXAMPLE 1

[0174] An amount of 100 parts by weight of polyvinyl butyral resin (polyvinyl butyral resin acetalized by n-butyraldehyde, average degree of polymerization: 1700, hydroxy group content: 29.5 mol %, degree of acetylation: 0.7 mol %, degree of butyralization: 68.5 mol %) was blended with 0.5 parts by weight of diethyl 2,5-dihydroxyterephthalate (Sigma-Aldrich) as an aromatic compound having a structure capable of coordinating with a metal, 0.1 parts by weight of 2,6-di-tert-butyl-p-cresol as an antioxidant, 0.2 parts by weight of 2-[2-hydroxy-3,5-bis(a,a-dimethyl benzyl)phenyl]-2H-benzotriazole as an ultraviolet absorber, 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, and aqueous solution of potassium formate (Wako Pure Chemical Industries, Ltd) (potassium concentration of the aqueous solution: 3.65% by weight) as an adhesion modifier in an amount that the interlayer film for laminated glass has a potassium concentration of 150 ppm. The mixture was well kneaded with a mixing roll to give a resin composition.

[0175] The obtained resin composition was extruded from an extruder to give a monolayer interlayer film for laminated glass having an average thickness of 0.76 mm.

[0176] A transparent float plate glass (thickness: 2.5 mm, size: 100 mm100 mm), the produced interlayer film for laminated glass (average thickness: 0.76 mm), and a transparent float plate glass (thickness: 2.5 mm) were laminated in the stated order and fixed with a heat-resistant tape so as not to be dislocated.

[0177] The obtained laminate was placed in a vacuum bag, and the vacuum bag was deaerated at room temperature (25 C.) and at a degree of reduced pressure of 933.2 hPa. Next, the vacuum bag was heated to 100 C. while the deaeration state was maintained, and held for 20 minutes after the temperature reached 100 C. Then, the vacuum bag was naturally cooled. When the temperature was confirmed to be lowered to 30 C., the pressure was released to atmospheric pressure.

[0178] The temporarily bonded laminated glass obtained by the above method was pressure-bonded in an autoclave at 135 C. and a pressure of 1.2 MPa for 20 minutes to give a laminated glass.

EXAMPLES 2 TO 19, COMPARATIVE EXAMPLE 1

[0179] Interlayer films for laminated glass and laminated glasses were produced in the same manner as in Example 1, except that the amounts added of the aromatic compound having a structure capable of coordinating with a metal and the antioxidant were set as shown in Tables 1 and 2.

[0180] The antioxidant used in Comparative Example 1 was IRGANOX L57 (octyl/butyldiphenyl amine, Ciba Specialty Chemicals).

(Evaluation)

[0181] The laminated glasses obtained in the examples and the comparative example were evaluated by the following methods. Tables 1 and 2 show the results.

(1) Yellow Index

[0182] The initial yellow index of each obtained laminated glass was measured using a recording spectrophotometer (U4100, Hitachi, Ltd.) in conformity with JIS K 7373 (2006). Each obtained laminated glass was left at a temperature of 100 C. for 336 hours. The yellow index after heating of the heated laminated glass was measured using a recording spectrophotometer (U4100, Hitachi, Ltd.) in conformity with JIS K 7373 (2006).

[0183] Based on the obtained yellow indexes, the difference in the yellow index (=(yellow index after heating)(initial yellow index)) was calculated. The case where the difference in the yellow index was smaller than 15 was rated Good (), and the case where the difference was 15 or larger was rated Poor ().

(2) Visible Light Transmittance

[0184] The transmittance of each obtained laminated glass was measured using a recording spectrophotometer (U4100, Hitachi, Ltd.) within a range of 300 to 2500 nm and the visible light transmittance within a range of 380 to 780 nm was calculated, in conformity with JIS R 3211 (1998).

(3) Pummel Value

[0185] Each obtained laminated glass was allowed to stand at a temperature of 18 C.0.6 C. for 16 hours, and the central portion of the resulting laminated glass was hit with a hammer (head weight of 0.45 kg) until the shattered glass had a particle size of 6 mm or smaller. The degree of exposure of the film after the glass partially fell off was measured, and the Pummel value was determined based on Table 3. The case where the obtained Pummel value was 2 to 7 was rated Good (). The case where the obtained Pummel value was 0, 1, or 8 was rated Poor ().

TABLE-US-00001 TABLE 1 Exam- Exam- Exam- Exam- Exam- ple 1 ple 2 ple 3 ple 4 ple 5 Composition Polyvinyl butyral resin Parts by weight 100 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 40 film Aromatic Diethyl 2,5-dihydroxyterephthalate Parts by weight 0.5 0.5 0.5 0.2 0.2 compound 2,4-Dihydroxybenzophenone Parts by weight 0 0 0 0 0 Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0.1 0.2 0.4 0.1 0.2 4,4-Butylidene-bis- Parts by weight 0 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] IRGANOX L57 Parts by weight 0 0 0 0 0 UV 2-[2-Hydroxy-3,5- Parts by weight 0.2 0.2 0.2 0.2 0.2 absorber bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazolyl)- Parts by weight 0 0 0 0 0 6-tert-butyl-p-cresol Potassium formate ppm (potassium) 150 150 150 150 150 Evaluation Yellow index Initial YI 7 7 7 7 7 YI after heating 9.2 8.5 7.8 8.8 8.2 Difference in yellow index 2.2 1.5 0.8 1.8 1.2 Evaluation on difference in yellow index Visible light transmittance (%) 88.7 88.7 88.7 88.3 88.5 Pummel Pummel value 3 3 3 3 3 value Evaluation Exam- Exam- Exam- Exam- Exam- ple 6 ple 7 ple 8 ple 9 ple 10 Composition Polyvinyl butyral resin Parts by weight 100 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 40 film Aromatic Diethyl 2,5-dihydroxyterephthalate Parts by weight 0.2 0.5 0.5 0.5 0.2 compound 2,4-Dihydroxybenzophenone Parts by weight 0 0 0 0 0 Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0.4 0 0 0 0 4,4-Butylidene-bis- Parts by weight 0 0.1 0.2 0.4 0.1 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] IRGANOX L57 Parts by weight 0 0 0 0 0 UV 2-[2-Hydroxy-3,5- Parts by weight 0.2 0.2 0.2 0.2 0.2 absorber bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazolyl)- Parts by weight 0 0 0 0 0 6-tert-butyl-p-cresol Potassium formate ppm (potassium) 150 150 150 150 150 Evaluation Yellow index Initial YI 7 7 7 7 7 YI after heating 7.8 9.2 8.5 7.8 8.8 Difference in yellow index 0.8 2.2 1.5 0.8 1.8 Evaluation on difference in yellow index Visible light transmittance (%) 88.3 88.7 88.7 88.7 88.3 Pummel Pummel value 3 3 3 3 3 value Evaluation

TABLE-US-00002 TABLE 2 Exam- Exam- Exam- Exam- Exam- Exam- ple 11 ple 12 ple 13 ple 14 ple 15 ple 16 Composition Polyvinyl butyral resin Parts by weight 100 100 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 40 40 film Aromatic Diethyl 2,5-dihydroxyterephthalate Parts by weight 0.2 0.2 0.5 0.5 0.5 0.2 compound 2,4-Dihydroxybenzophenone Parts by weight 0 0 0 0 0 0 Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0 0 0 0 0 0 4,4-Butylidene-bis- Parts by weight 0.2 0.4 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0.1 0.2 0.4 0.1 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] IRGANOX L57 Parts by weight 0 0 0 0 0 0 UV absorber 2-[2-Hydroxy-3,5- Parts by weight 0.2 0.2 0.2 0.2 0.2 0.2 bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazolyl)- Parts by weight 0 0 0 0 0 0 6-tert-butyl-p-cresol Potassium formate ppm (potassium) 150 150 150 150 150 150 Evaluation Yellow Intial YI 7 7 7 7 7 7 index YI after heating 8.2 7.8 9.2 8.5 7.8 8.8 Difference in yellow index 1.2 0.8 2.2 1.5 0.8 1.8 Evaluation on difference in yellow index Visible light transmittance (%) 88.5 88.3 88.7 88.7 88.7 88.3 Pummel Pummel value 3 3 3 3 3 3 value Evaluation Exam- Exam- Exam- Comparative ple 17 ple 18 ple 19 Example 1 Composition Polyvinyl butyral resin Parts by weight 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 film Aromatic Diethyl 2,5-dihydroxyterephthalate Parts by weight 0.2 0.2 0 0.2 compound 2,4-Dihydroxybenzophenone Parts by weight 0 0 0.2 0 Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0 0 0.2 0 4,4-Butylidene-bis- Parts by weight 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0.2 0.4 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] IRGANOX L57 Parts by weight 0 0 0 0.2 UV absorber 2-[2-Hydroxy-3,5- Parts by weight 0.2 0.2 0.2 0.2 bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazolyl)- Parts by weight 0 0 0 0 6-tert-butyl-p-cresol Potassium formate ppm (potassium) 150 150 150 150 Evaluation Yellow Intial YI 7 7 5 7 index YI after heating 8.2 7.8 6.6 23 Difference in yellow index 1.2 0.8 1.6 16 Evaluation on difference in yellow index x Visible light transmittance (%) 88.5 88.3 88.8 88.3 Pummel Pummel value 3 3 3 3 value Evaluation

TABLE-US-00003 TABLE 3 Degree of exposure of interlayer film (area %) Pummel value 90 < Degree of exposure 100 0 85 < Degree of exposure 90 1 60 < Degree of exposure 85 2 40 < Degree of exposure 60 3 20 < Degree of exposure 40 4 10 < Degree of exposure 20 5 5 < Degree of exposure 10 6 2 < Degree of exposure 5 7 Degree of exposure 2 8

EXAMPLE 20

[0186] An amount of 100 parts by weight of polyvinyl butyral resin (polyvinyl butyral resin acetalized by n-butyraldehyde, average degree of polymerization: 1700, hydroxy group content: 30.8 mol %, degree of acetylation: 0.7 mol %, degree of butyralization: 68.5 mol %) was blended with 0.5 parts by weight of diethyl 2,5-dihydroxyterephthalate (Sigma Aldrich) as a luminescent material, 0.2 parts by weight of 2-[2-hydroxy-3,5-bis(a,a-dimethylbenzyl)phenyl]-2H-benzotriazole as a ultraviolet absorber, 0.2 parts by weight of 2,6-di-tert-butyl-p-cresol as an antioxidant, 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, and potassium formate (Wako Pure Chemical Industries, Ltd) as an adhesion modifier in an amount that the potassium concentration reached 150 ppm. The mixture was kneaded well with a mixing roll to give a resin composition.

[0187] The obtained resin composition was extruded from an extruder to give a monolayer interlayer film for laminated glass having an average thickness of 0.76 mm.

[0188] A transparent float plate glass (thickness: 2.5 mm), the interlayer film for laminated glass, and a transparent float plate glass (thickness: 2.5 mm) were laminated in the stated order and fixed with a heat-resistant tape so as not to be dislocated.

[0189] The obtained laminate was placed in a vacuum bag, and the vacuum bag was deaerated at room temperature (25 C.) and at a degree of reduced pressure of 933.2 hPa. Next, the vacuum bag was heated to 100 C. while the deaeration state was maintained, and held for 20 minutes after the temperature reached 100 C. Then, the vacuum bag was naturally cooled. When the temperature was confirmed to be lowered to 30 C., the pressure was released to atmospheric pressure.

[0190] The temporarily bonded laminated glass obtained by the above method was pressure-bonded in an autoclave at 135 C. and a pressure of 1.2 MPa for 20 minutes to give a laminated glass.

[0191] It is to be noted that two laminated glasses different in size were produced for the following evaluation tests, and one had a size of 150 mm in length150 mm in width and the other had a size of 50 mm in length50 mm in width.

EXAMPLES 21 TO 35, COMPARATIVE EXAMPLES 2, 3

[0192] Interlayer films for laminated glass and laminated glasses were produced in the same manner as in Example 20, except that the amounts added of the luminescent material and the ultraviolet absorber were set as shown in Tables 4 and 5.

(Evaluation)

[0193] The laminated glasses obtained in the examples and the comparative examples were evaluated by the following methods. Tables 4 and 5 show the results.

(1) Luminance

[0194] Each obtained laminated glass having a size of 50 mm in length50 mm in width was placed in a dark room, and the entire surface thereof was irradiated with light from a high power xenon light source (REX-250, Asahi Spectra Co., Ltd, irradiation wavelength: 405 nm) set at a position of 10 cm distant from the plane of the laminated glass in the vertical direction. The luminance was measured with a luminance meter (SR-3AR, Topcon Technohouse Corporation) set at a position at an angle of 45 degrees relative to the plane of the irradiated laminated glass at a distance of 35 cm from the plane of the laminated glass and on the side under irradiation with light.

[0195] The case where the obtained luminance was 200 cd/m.sup.2 or higher was rated Good (). The case where the luminance was lower than 200 cd/m.sup.2 was rated Poor ().

[0196] Each obtained laminated glass having a size of 50 mm50 mm was irradiated with UV light from a JIS-UV tester (750 W, light source: quartz mercury lamp) for 1000 hours.

[0197] After UV irradiation, the luminance was determined in the same manner as in the evaluation method of the initial luminance.

[0198] The proportion of the luminance after UV irradiation to the initial luminance (luminance after UV irradiation/initial luminance100) was calculated. The case where the proportion was 50% or higher was rated Good (). The case where the proportion was lower than 50% was rated Poor ().

(2) Visible Light Transmittance

[0199] The transmittance of each obtained laminated glass having a size of 50 mm in length50 mm in width was measured using a recording spectrophotometer (U4100, Hitachi, Ltd.) within a range of 300 to 2500 nm and the visible light transmittance within a range of 380 to 780 nm was calculated in conformity with JIS R 3211 (1998).

(3) Pummel Value

[0200] Each obtained laminated glass having a size of 150 mm in length150 mm in width was allowed to stand at a temperature of 18 C.0.6 C. for 16 hours, and the central portion of the resulting laminated glass was hit with a hammer (head weight of 0.45 kg) until the shattered glass had a particle size of 6 mm or smaller. The degree of exposure of the film after the glass partially fell off was measured, and the Pummel value was determined based on Table 6. The case where the obtained Pummel value was 2 to 7 was rated Good (). The case where the obtained Pummel value was 0, 1, or 8 was rated Poor ().

TABLE-US-00004 TABLE 4 Exam- Exam- Exam- Exam- Exam- ple 20 ple 21 ple 22 ple 23 ple 24 Compositon Polyvinyl butyral resin Parts by weight 100 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 40 film Luminescent material Parts by weight 0.5 0.5 0.5 0.5 0.1 (Diethyl 2,5-dihydroxyterephthalate) UV 2-[2-Hydroxy-3,5- Parts by weight 0.2 0.4 0.8 1 0.2 absorber bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazoryl)- Parts by weight 0 0 0 0 0 6-tert-butyl-p-cresol Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0.2 0.2 0.2 0.2 0.2 4,4-Butylidene bis Parts by weight 0 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] Potassium formate ppm (potassium) 150 150 150 150 150 Evaluation Luminance Initial luminance (cd/m.sup.2) 950 930 910 890 300 Evaluation on initial luminace Luminance after UV irradiation (cd/m.sup.2) 940 923 906 888 250 Evaluation on proportion of luminance after UV irradiation Visible light transmittance (%) 88.7 88.5 88.3 88.2 88.5 Pummel Pummel value 3 3 3 3 3 value Evaluation Exam- Exam- Exam- Exam- ple 25 ple 26 ple 27 ple 28 Compositon Polyvinyl butyral resin Parts by weight 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 film Luminescent material Parts by weight 0.1 0.1 0.1 0.5 (Diethyl 2,5-dihydroxyterephthalate) UV 2-[2-Hydroxy-3,5- Parts by weight 0.4 0.8 1.0 0 absorber bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazoryl)- Parts by weight 0 0 0 0.2 6-tert-butyl-p-cresol Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0.2 0.2 0.2 0.2 4,4-Butylidene bis Parts by weight 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] Potassium formate ppm (potassium) 150 150 150 150 Evaluation Luminance Initial luminance (cd/m.sup.2) 280 235 210 950 Evaluation on initial luminace Luminance after UV irradiation (cd/m.sup.2) 240 220 201 940 Evaluation on proportion of luminance after UV irradiation Visible light transmittance (%) 88.8 88.5 88.7 88.7 Pummel Pummel value 3 3 3 3 value Evaluation

TABLE-US-00005 TABLE 5 Exam- Exam- Exam- Exam- Exam- ple 29 ple 30 ple 31 ple 32 ple 33 Composition Polyvinyl butyral resin Parts by weight 100 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 40 film Luminescent material Parts by weight 0.5 0.5 0.5 0.1 0.1 (Diethyl 2,5-dihydroxyterephthalate) UV 2-[2-Hydroxy-3,5- Parts by weight 0 0 0 0 0 absorber bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazolyl)- Parts by weight 0.4 0.8 1 0.2 0.4 6-tert-butyl-p-cresol Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0.2 0.2 0.2 0.2 0.2 4,4-butylidene bis Parts by weight 0 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] Potassium formate ppm (potassium) 150 150 150 150 150 Evaluation Luminance Initial luminance (cd/m.sup.2) 930 910 890 300 280 Evaluation on initial luminance Luminance after UV irradiation (cd/m.sup.2) 923 906 888 250 240 Evaluation on iluminance after UV irradiation Visible light transmittance (%) 88.5 88.3 88.2 88.5 88.8 Pummel Pummel value 3 3 3 3 3 value Evaluation Exam- Exam- Comparative Comparative ple 34 ple 35 Example 1 Example 2 Composition Polyvinyl butyral resin Parts by weight 100 100 100 100 of interlayer Plasticizer (3GO) Parts by weight 40 40 40 40 film Luminescent material Parts by weight 0.1 0.1 0.1 0.1 (Diethyl 2,5-dihydroxyterephthalate) UV 2-[2-Hydroxy-3,5- Parts by weight 0 0 0 1.5 absorber bis(a,a-dimethylbenzyl)phenyl]- 2H-benzotriazole 2-(5-Chloro-2-benzotriazolyl)- Parts by weight 0.8 1.0 0 0 6-tert-butyl-p-cresol Antioxidant 2,6-Di-tert-butyl-p-cresol Parts by weight 0.2 0.2 0 0 4,4-butylidene bis Parts by weight 0 0 0 0 (6-tert-butyl-m-cresol) Pentaerythritol tetrakis Parts by weight 0 0 0 0 [3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate] Potassium formate ppm (potassium) 150 150 150 150 Evaluation Luminance Initial luminance (cd/m.sup.2) 235 210 330 150 Evaluation on initial luminance x Luminance after UV irradiation (cd/m.sup.2) 220 201 160 149 Evaluation on iluminance after UV irradiation x Visible light transmittance (%) 88.5 88.7 88.5 88.3 Pummel Pummel value 3 3 3 3 value Evaluation

TABLE-US-00006 TABLE 6 Degree of exposure of interlayer film (area %) Pummel value 90 < Degree of exposure 100 0 85 < Degree of exposure 90 1 60 < Degree of exposure 85 2 40 < Degree of exposure 60 3 20 < Degree of exposure 40 4 10 < Degree of exposure 20 5 5 < Degree of exposure 10 6 2 < Degree of exposure 5 7 Degree of exposure 2 8

INDUSTRIAL APPLICABILITY

[0201] According to the first aspect of the present invention, an interlayer film for laminated glass, an interlayer film for luminescent laminated glass, and a laminated glass including the interlayer film for laminated glass which are significantly suppressed while containing an aromatic compound such as a salicylic acid compound or a benzophenone compound can be provided.