Laminated glass-use intermediate film and laminated glass

• US 7,160,624 B2
• Filed: 07/26/2002
• Issued: 01/09/2007
• Est. Priority Date: 07/26/2001
• Status: Expired due to Term

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Yoshioka, Tadahiko, Fukatani, Juichi, Kobata, Shinnen
• Primary Examiner(s): Harlan; Robert D.
• Application Number:
  US10/484,077
• Publication Number:
  US 20040234778A1
• Time in Patent Office: 1,628 Days
• Field of Search: 428/437, 428/46, 428/323, 428/339
• US Class Current: 428/437
• 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 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 oide (ITO) fine particle, an antimony-dope tin oxide (ATO) fine particle, an aluminum-doped zinc oxide (AZO) fine particle, an indium-dope 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 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/μ

m² or less, and

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

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.

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

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.

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

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.

4. 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.

5. 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.

6. 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.

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

wherein the polyvinylacetal resin is a polyvinyl butyral resin.

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

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.

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

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.

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

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.

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

12. A window material for vehicle, obtained by using the laminated glass according to claim 11.

13. A vehicle, obtained by using the window material for vehicle according to claim 12.

14. A building material, obtained by using the laminated glass according to claim 11.

15. A building, obtained by using the building material according to claim 14.