INTERLAYER FOR LAMINATED GLASS, AND LAMINATED GLASS

• US 20130288061A1
• Filed: 12/09/2011
• Published: 10/31/2013
• Est. Priority Date: 12/09/2010
• Status: Active Grant

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Kitano, Hirofumi, Fukatani, Juichi, Tsunoda, Ryuta, Ii, Daizou
• Granted Patent: US 9,796,825 B2
• Time in Patent Office: Days
• US Class Current: 428/437
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• 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 2250/03 3 layers
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 5/07 Aldehydes; Ketones
• CPC Class Codes: C08K 5/098 Metal salts of carboxylic acids
• CPC Class Codes: C08K 5/3475 condensed with carbocyclic rings
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]

Abstract

Provided is an interlayer film for laminated glass which has high heat shielding properties, a high visible transmittance, and excellent light resistance which enables retention of the high visible transmittance for a long period of time. The interlayer film for laminated glass according to the present invention has an interlayer film for laminated glass with a single layer structure or a laminated structure of two or more layers, the interlayer film for laminated glass according to the present invention comprises a first layer, and the first layer contains a polyvinyl acetal resin; a plasticizer; a tungsten oxide particle; a magnesium salt of an organic acid having a branched structure; and a metal salt of a C2 to C8 organic acid, other than the magnesium salt of an organic acid having a branched structure.

Claims

1. An interlayer film for laminated glass with a single layer structure or a laminated structure of two or more layers, comprising:

a first layer containing a polyvinyl acetal resin;

a plasticizer;

a tungsten oxide particle;

a magnesium salt of an organic acid having a branched structure; and

a metal salt of a C2 to C8 organic acid, other than the magnesium salt of an organic acid having a branched structure.

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

wherein the C2 to C8 organic acid is a C2 to C8 organic acid having a linear structure.

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

wherein the C2 to C8 organic acid is a C2 to C6 organic acid having a linear structure.

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

wherein the C2 to C8 organic acid is a C2 to C6 organic acid having a branched structure.

5. The interlayer film for laminated glass according to any one of claims 1 to 4,

wherein the magnesium salt of an organic acid having a branched structure is a magnesium salt of a C6 to C12 organic acid having a branched structure.

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

wherein the magnesium salt of an organic acid having a branched structure is magnesium bis(2-ethylbutyrate).

7. The interlayer film for laminated glass according to any one of claims 1 to 4,

wherein the first layer has a magnesium concentration of 400 ppm or lower.

8. The interlayer film for laminated glass according to any one of claims 1 to 4,

wherein the tungsten oxide particle is a caesium-doped tungsten oxide particle.

9. The interlayer film for laminated glass according to any one of claims 1 to 4,

wherein the first layer further contains an ultraviolet shielding agent.

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

wherein the ultraviolet shielding agent is a benzotriazol compound or a benzophenone compound.

11. Laminated glass comprising;

a first component for laminated glass;

a second component for laminated glass; and

an interlayer film sandwiched between the first component for laminated glass and the second component for laminated glass,

wherein the interlayer film is the interlayer film for laminated glass according to any one of claims 1 to 4.