Laminated glass-use intermediate film and laminated glass

• US 20040234778A1
• Filed: 06/21/2004
• Published: 11/25/2004
• Est. Priority Date: 07/26/2001
• Status: Active Grant

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Yoshioka, Tadahiko, Fukatani, Juichi, Kobata, Shinnen
• Granted Patent: US 7,160,624 B2
• Time in Patent Office: Days
• US Class Current: 428/426
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10165 Functional features of the laminated safety glass or glazing
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10678 comprising UV absorbers or stabilizers, e.g. antioxidants
• CPC Class Codes: B32B 17/10688 Adjustment of the adherence to the glass layers
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10853 the membrane being bag-shaped
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: Y10T 428/162 Transparent or translucent layer or section
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

An object of the present invention is to provide an interlayer film for a laminated glass and a laminated glass, which are superior in transparency, heat shield property, electromagnetic wave permeability and weatherability.

The present invention is directed to an interlayer film for a laminated glass, wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has an electromagnetic wave shielding performance of 10 dB or less at a frequency of 0.1 to 10 MHz and 2 to 26.5 GHz, a haze of 1.0% or less, a visible light transmittance of 70% or more and a solar radiation transmittance of 85% or less of the visible light transmittance in a wavelength region of 300 nm to 2100 nm.

Claims

1. An interlayer film for a laminated glass,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has an electromagnetic wave shielding performance of 10 dB or less at a frequency of 0.1 to 10 MHz and 2 to 26.5 GHz, a haze of 1.0% or less, a visible light transmittance of 70% or more and a solar radiation transmittance of 85% or less of the visible light transmittance in a wavelength region of 300 nm to 2100 nm.

15. The interlayer film for a laminated glass according to claim 1,

wherein the solar radiation transmittance is 85% or less of the visible light transmittance in a wavelength region of 300 to 2100 nm.

16. The interlayer film for a laminated glass according to claim 1,

wherein the film is made of plasticized polyvinylacetal resin composition,

the plasticized polyvinylacetal resin composition contains 100 parts by weight of a polyvinylacetal resin, 20 to 60 parts by weight of a plasticizer and 0.1 to 3 parts by weight of at least one kind of a fine particle selected from the group consisting of a tin-doped indium oxide (ITO) fine particle, an antimony-doped tin oxide (ATO) fine particle, an aluminum-doped zinc oxide (AZO) fine particle, an indium-doped zinc oxide (IZO) fine particle, a tin-doped zinc oxide fine particle, a silicon-doped zinc oxide fine particle, a lanthanum hexaboride fine particle and a cerium hexaboride fine particle, and the fine particle has an average particle diameter of 80 nm or less, and a particle having a particle diameter of 100 nm or more is dispersed in a density of one particle/m² or less.

17. The interlayer film for a laminated glass according to claim 1,

wherein the film is made of a plasticized polyvinylacetal resin composition,

the plasticized polyvinylacetal resin composition contains 100 parts by weight of a polyvinylacetal resin, 20 to 60 parts by weight of a plasticizer and 0.00001 to 5 parts by weight of at least one kind of a compound selected from the group consisting of a diimmonium pigment, an aminium pigment, a phthalocyanine pigment, an anthraquinone pigment, a polymethine pigment, a benzenedithiol ammonium compound, a thiourea derivatives and a thiol metallic complexes, and the compound is dispersed uniformly within the plasticized polyvinylacetal resin composition.

18. The interlayer film for a laminated glass according to claim 1,

wherein the film is made of a plasticized polyvinylacetal resin composition,

the plasticized polyvinylacetal resin composition contains 100 parts by weight of a polyvinylacetal resin, 20 to 60 parts by weight of a plasticizer, 0.1 to 3 parts by weight of at least one kind of a fine particle selected from the group consisting of a tin-doped indium oxide (ITO) fine particle, an antimony-doped tin oxide (ATO) fine particle, an aluminum-doped zinc oxide (AZO) fine particle, an indium-doped zinc oxide (IZO) fine particle, a tin-doped zinc oxide fine particle, a silicon-doped zinc oxide fine particle, a lanthanum hexaboride fine particle and a cerium hexaboride fine particle and 0.00001 to 5 parts by weight of at least one kind of compound selected from the group consisting of a diimmonium pigment, an aminium pigment, a phthalocyanine pigment, an anthraquinone pigment, a polymethine pigment, a benzenedithiol ammonium compound, a thiourea derivatives and a thiol metallic complexes, the fine particle has an average particle diameter of 80 nm or less, and a particle having a particle diameters of 100 nm or more is dispersed in a density of one particle/μ

m² or less, and the compound is dispersed uniformly within the plasticized polyvinylacetal resin composition.

19. The interlayer film for a laminated glass according to claim 16,

wherein the polyvinylacetal resin is a polyvinyl butyral resin.

20. The interlayer film for a laminated glass according to claim 16,

wherein the plasticized polyvinylacetal resin composition further contains a malonic ester compound and/or an oxalic acid anilide compound as an ultraviolet absorber.

21. The interlayer film for a laminated glass according to claim 16,

wherein the plasticized polyvinylacetal resin composition further contains, as an ultraviolet absorber, a mixture of a malonic ester compound and/or an oxalic acid anilide compound with at least one compound selected from the group consisting of a benzotriazole compound, a benzophenone compound, a triazine compound, a benzoate compound and hindered amine compound.

22. The interlayer film for a laminated glass according to claim 16,

wherein the plasticized polyvinylacetal resin composition further contains, as an adhesive adjuster, an alkali metal salt or alkaline-earth metal salt of an organic or inorganic acid, or a modified silicone oil.

23. The interlayer film for a laminated glass according to claim 16,

wherein the plasticized polyvinylacetal resin composition further contains, as a dispersion stabilizer, at least one kind of compound selected from the group consisting of sulfuric ester compound, phosphate ester compound, ricinoleic acid, polyricinoleic acid, polycarboxylic acid, a polyhydric alcohol surfactant, polyvinyl alcohol and polyvinyl butyral.

24. A laminated glass, obtained by using the interlayer film for a laminated glass according to claim 1.

25. A window material for vehicle, obtained by using the interlayer film for a laminated glass according to claim 1.

26. A vehicle, obtained by using the window material for vehicle according to claim 25.

27. A building material, obtained by using the interlayer film for a laminated glass according to claim 1.

28. A building, obtained by using the building material according to claim 27.

2. An interlayer film for a laminated glass,

which has a relative permittivity of 4.5 or less and/or a dielectric dissipation factor, tan δ

, of 0.1 or less at a measurement frequency of 1 MHz to 1.86 GHz, and

a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has a haze of 1.0% or less, a visible light transmittance of 70% or more, and a solar radiation transmittance of 85% or less of the visible light transmittance in the wavelength region of 300 nm to 2100 nm.

3. The interlayer film for a laminated glass according to claim 2, wherein the film has a relative permittivity of 4.2 or less and/or a dielectric dissipation factor, tan δ

, of 0.08 or less at a measurement frequency of 10 MHz.

4. The interlayer film for a laminated glass according to claim 3,

wherein the film has a relative permittivity of 3.8 or less and/or a dielectric dissipation factor, tanδ

, of 0.08 or less at a measurement frequency of 100 MHz.

5. The interlayer film for a laminated glass according to claim 4,

wherein the film has a relative permittivity of 3.4 or less and/or a dielectric dissipation factor, tan δ

, of 0.08 or less at a measurement frequency of 1 GHz.

6. The interlayer film for a laminated glass according to claim 5,

wherein the film has a relative permittivity of 3.3 or less and/or a dielectric dissipation factor, tan δ

, of 0.08 or less at a measurement frequency of 1.8 GHz.

7. An interlayer film for a laminated glass,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has a haze of 1.0% or less, a visible light transmittance of 70% or more, a solar radiation transmittance of 85% or less of the visible light transmittance in the wavelength region of 300 nm to 2100 nm, and a mid-infrared ray transmittance of 20% or less in the wavelength region of 1500 to 2100 nm.

8. The interlayer film for a laminated glass according to claim 7,

wherein the laminated glass has a near-infrared ray transmittance of 70% or less in the wavelength region of 780 to 1500 nm.

9. An interlayer film for a laminated glass,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass, and high heat ray absorbing glass, has a haze of 1.0% or less, a visible light transmittance of 70% or more, a solar radiation transmittance of 85% or less of the visible light transmittance in the wavelength region of 300 nm to 2100 nm, and in a solar radiation transmittance integral T in the wavelength region of 300 to 2500 nm, a ratio Tb of the solar radiation transmittance integral of 10.0% or less in the wavelength region of 1400 to 1600 nm and/or a ratio Td of the solar radiation transmittance integral of 2.0% or less in the wavelength region of 1800 to 2000 nm.

10. An interlayer film for a laminated glass,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has a haze of 1.0% or less, a visible light transmittance of 70% or more, a solar radiation transmittance of 85% or less of the visible light transmittance in the wavelength region of 300 nm to 2100 nm, and in a solar radiation transmittance integral T in the wavelength region of 300 to 2500 nm, a ratio Ta of a solar radiation transmittance integral of 15.0% or less in the wavelength region of 1200 to 1400 nm and/or a ratio Tc of the solar radiation transmittance integral of 3.0% or less in the wavelength region of 1600 to 1800 nm and/or a ratio Te of the solar radiation transmittance integral of 2.0% or less in the wavelength region of 2000 to 2400 nm.

11. An interlayer film for a laminated glass,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass, and high heat ray absorbing glass, has a haze of 1.0% or less, a visible light transmittance of 70% or more, a solar radiation transmittance of 85% or less of the visible light transmittance in the wavelength region of 300 nm to 2100 nm, and in a solar radiation transmittance integral T in the wavelength region of 300 to 2500 nm, a ratio Ta of the solar radiation transmittance integral of 15.0% or less in the wavelength region of 1200 to 1400 nm and/or a ratio Tb of the solar radiation transmittance integral of 10.0% or less in the wavelength region of 1400 to 1600 nm and/or a ratio Tc of the solar radiation transmittance integral of 3.0% or less in the wavelength region of 1600 to 1800 nm and/or a ratio Td of the solar radiation transmittance integral of 2.0% or less in the wavelength region of 1800 to 2000 nm and/or a ratio Te of the solar radiation transmittance integral of 2.0% or less in the wavelength region of 2000 to 2400 nm.

12. An interlayer film for a laminated glass,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has the decrease of the visible light transmittance of the laminated glass after irradiating the ultraviolet ray of 2.0% or less, when irradiated with ultraviolet ray with an intensity of 100 mW/cm² and wavelength of 295 to 450 nm for 300 hours.

13. The interlayer film for a laminated glass according to claim 12,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has the increase of the yellow index value of the laminated glass after irradiating the ultraviolet ray of 4.0 or less, when irradiated with ultraviolet ray with an intensity of 100 mW/cm² and wavelength of 295 to 450 nm for 300 hours.

14. The interlayer film for a laminated glass according to claim 12,

wherein a laminated glass, produced by interposing the film between two sheets of glass selected from the group consisting of clear glass, green glass and high heat ray absorbing glass, has the increase of the b* value of the laminated glass, in the CIE 1976 L*a*b* color system, after irradiating the ultraviolet ray of 3.0 or less, when irradiated with ultraviolet ray with an intensity of 100 mW/cm² and wavelength of 295 to 450 nm for 300 hours.