Interlayer film for laminate glass and laminate glass

• US 20060110593A1
• Filed: 12/14/2004
• Published: 05/25/2006
• Est. Priority Date: 12/26/2003
• Status: Active Grant

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Hatta, Bungo, Fukatani, Juichi
• Granted Patent: US 7,491,440 B2
• Time in Patent Office: Days
• US Class Current: 428/328
• 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 17/10633 Infrared radiation absorbing or reflecting agents
• 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 2250/03 3 layers
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2264/102 Oxide or hydroxide
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/422 Luminescent, fluorescent, phosphorescent
• CPC Class Codes: B32B 2307/71 Resistive to light or to UV
• CPC Class Codes: B32B 2419/00 Buildings or parts thereof walls, panels B32B2607/00
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/3163 : Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31942 : Of aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31946 : Next to second aldehyde or ketone condensation product

Abstract

The present invention aims to provide an interlayer film for a laminate glass to obtain a laminate glass which is excellent in transparency, heat-shielding property, and electromagnetic wave transmittance even if the laminate glass is produced by sandwiching the interlayer film for a laminate glass with one pair of glasses, and which is not deteriorated in the visible light transmittance and the initial optical properties and is excellent in weathering-resistance after the test even if a durability test to light is run for the above-mentioned laminate glass. The present invention is an interlayer film for a laminate glass which comprises at least each one layer of a heat-shielding layer and an UV-shielding layer.

Claims

1. An interlayer film for a laminate glass,

which comprises at least each one layer of a heat-shielding layer and an UV-shielding layer.

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

which comprises three layers composed of at least the heat-shielding layer and the UV-shielding layers formed on both faces of the heat-shielding layer.

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

wherein the heat-shielding layer has an electromagnetic wave shield capability of 10 dB or lower at a frequency of 0.1 MHz to 26.5 GHz;

a haze of 1.0% or lower;

a visible light transmittance of 70% or higher; and

a solar radiation transmittance of 85% or lower of the visible light transmittance in a wavelength range of 300 to 2,100 nm in the case where the heat-shielding layer is inserted between two plates of glass selected from a group consisting of clear glasses, green glasses, high heat ray absorption glasses and UV absorption glasses to obtain a laminate glass, and

the UV-shielding layer has an UV transmittance of 60% or lower measured in accordance with SAE J1796 in the case where the UV-shielding layer is inserted between two plates of glass selected from a group consisting of clear glasses, green glasses, high heat ray absorption glasses, and UV absorption glasses to obtain a laminate glass.

4. The interlayer film for a laminate glass according to claim 1,

wherein the heat-shielding layer contains a transparent resin and a heat-shielding agent.

5. The interlayer film for a laminate glass according to claim 1,

wherein the heat-shielding layer contains 100 parts by weight of a polyvinyl acetal resin, 20 to 60 parts by weight of a plasticizer, 0.0001 to 1.0 part by weight of an alkali metal salt and/or alkaline earth metal salt, 0.1 to 3.0 parts by weight of a tin-dope indium oxide fine particle, 0.01 to 5.0 parts by weight of a dispersion stabilizer, and 0.01 to 5.0 parts by weight of an antioxidant,

the tin-dope indium oxide fine particle having an average particle diameter of 80 nm or smaller and being dispersed so as to adjust the number of the particle with 100 nm or larger particle diameter to be 1 or less per 1 μ

m².

6. The interlayer film for a laminate glass according to claim 1,

wherein the UV-shielding layer contains a transparent resin and an UV-cutting agent.

7. The interlayer film for a laminate glass according to claim 6,

wherein the UV-cutting agent is at least one kind of UV absorbents selected from a group consisting of metal, metal oxide, benzotriazole, benzophenone, triazine, benzoate, malonic acid ester, and oxalic acid anilide.

8. The interlayer film for a laminate glass according to claim 6,

wherein the UV-cutting agent is a metal oxide UV absorbent.

9. The interlayer film for a laminate glass according to claim 8,

wherein the metal oxide UV absorbent is zinc oxide and/or titanium oxide.

10. The interlayer film for a laminate glass according to claim 8,

wherein the metal oxide UV absorbent is coated with an insulating metal oxide on the surface.

11. The interlayer film for a laminate glass according to claim 10,

wherein the insulating metal oxide is silica.

12. The interlayer film for a laminate glass according to claim 8,

wherein the metal oxide UV absorbent is coated with a hydrolyzable organic silicon compound on the surface.

13. The interlayer film for laminate glass according to claim 8,

wherein the metal oxide UV absorbent is coated with a silicone compound on the surface.

14. The interlayer film for a laminate glass according to claim 1,

wherein a visible light transmittance decrease is 1.0% or lower measured in accordance with JIS Z 8722 and JIS R 3106 (1998) after the interlayer film is inserted between two plates of glass selected from a group consisting of clear glasses, green glasses, high heat ray absorption glasses, and UV absorption glasses to obtain a laminate glass;

and Super Xenon 100-hours radiation test is run for the laminate glass.

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

wherein a visible light transmittance decrease is 3.0% or lower measured in accordance with JIS Z 8722 and JIS R 3106 (1998) after the interlayer film is inserted between two plates of glasses selected from a group consisting of clear glasses, green glasses, high heat ray absorption glasses, and UV absorption glasses to obtain a laminate glass;

and Super UV 300-hours radiation test is run for the laminate glass.

16. A laminate glass,

which is obtainable by using the interlayer film for the laminate glass according to claim 1.

17. The interlayer film for a laminate glass according to claim 2,

wherein the heat-shielding layer has an electromagnetic wave shield capability of 10 dB or lower at a frequency of 0.1 MHz to 26.5 GHz;

a haze of 1.0% or lower;

a visible light transmittance of 70% or higher; and

a solar radiation transmittance of 85% or lower of the visible light transmittance in a wavelength range of 300 to 2,100 nm in the case where the heat-shielding layer is inserted between two plates of glass selected from a group consisting of clear glasses, green glasses, high heat ray absorption glasses and UV absorption glasses to obtain a laminate glass, and

the UV-shielding layer has an UV transmittance of 60% or lower measured in accordance with SAE J1796 in the case where the UV-shielding layer is inserted between two plates of glass selected from a group consisting of clear glasses, green glasses, high heat ray absorption glasses, and UV absorption glasses to obtain a laminate glass.

18. The interlayer film for a laminate glass according to claim 2,

wherein the heat-shielding layer contains a transparent resin and a heat-shielding agent.

19. The interlayer film for a laminate glass according to claim 3,

wherein the heat-shielding layer contains a transparent resin and a heat-shielding agent.

20. The interlayer film for a laminate glass according to claim 2,

wherein the heat-shielding layer contains 100 parts by weight of a polyvinyl acetal resin, 20 to 60 parts by weight of a plasticizer, 0.0001 to 1.0 part by weight of an alkali metal salt and/or alkaline earth metal salt, 0.1 to 3.0 parts by weight of a tin-dope indium oxide fine particle, 0.01 to 5.0 parts by weight of a dispersion stabilizer, and 0.01 to 5.0 parts by weight of an antioxidant,

the tin-dope indium oxide fine particle having an average particle diameter of 80 nm or smaller and being dispersed so as to adjust the number of the particle with 100 nm or larger particle diameter to be 1 or less per 1 μ

m².