Interlayer for laminated glass, and laminated glass

Patent metadata

Field	Value
Publication number	US-9435913-B2
Application number	US-201113817611-A
Country	US
Kind code	B2
Filing date	Aug 19, 2011
Priority date	Aug 20, 2010
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

An interlayer film for laminated glass that suppresses the transmittance of ultraviolet rays with a wave length of 400 nm to 1% or less, and has high light resistance. The interlayer film for laminated glass comprises a thermoplastic resin, an ultraviolet absorber having a structure of formula (1), and an ultraviolet absorber having a structure of formula (2), wherein the amount of the ultraviolet absorber of formula (1) is 0.001 to 0.05% by weight, and the amount of the ultraviolet absorber of formula (2) is 0.5 to 1.0% by weight;

wherein R 1 is a C 1-3 alkyl group; R 2 is hydrogen, a C 1-10 alkyl group, or a C 7-10 aralkyl group; R 3 is hydrogen or a C 1-8 alkyl group; and R 4 is hydrogen or a C 1-8 alkyl group.

First claim

The invention claimed is:

1. An interlayer film for laminated glass comprising:
a thermoplastic resin,
an ultraviolet absorber having a structure of the following formula (1), and
an ultraviolet absorber having a structure of the following formula (2),
wherein an amount of the ultraviolet absorber having the structure of formula (1) is 0.001 to 0.05% by weight, and an amount of the ultraviolet absorber having the structure of formula (2) is 0.5 to 1.0% by weight;

wherein R 1 is a C 1-3 alkyl group; R 2 is hydrogen, a C 1-10 alkyl group, or a C 7-10 aralkyl group; R 3 is hydrogen or a C 1-8 alkyl group; and R 4 is hydrogen or a C 1-8 alkyl group.

2. The interlayer film for laminated glass according to claim 1 , further comprising triethylene glycol di-2-ethylhexanoate.

3. The interlayer film for laminated glass according to claim 1 , wherein the thermoplastic resin is a polyvinyl acetal resin.

4. The interlayer film for laminated glass according to claim 1 , wherein the thermoplastic resin is a polyvinyl butyral resin.

5. The interlayer film for laminated glass according to claim 1 , wherein the amount of the ultraviolet absorber having the structure of formula (1) is 0.01 to 0.04% by weight, and the amount of the ultraviolet absorber having the structure of formula (2) is 0.6 to 1.0% by weight.

6. The interlayer film for laminated glass according to claim 1 , further comprising an infrared absorbing agent.

7. The interlayer film for laminated glass according to claim 6 , wherein the infrared absorbing agent is made of tin-doped indium oxide particles.

8. The interlayer film for laminated glass according to claim 1 , wherein a cross-section of the interlayer film for laminated glass is a wedge shape with a wedge angle θ of 0.1 to 1.0 mrad.

9. The interlayer film for laminated glass according to claim 1 , comprising a sound-insulation layer.

10. The interlayer film for laminated glass according to claim 1 , wherein at least one part of the interlayer film for laminated glass is colored.

11. The interlayer film for laminated glass according to claim 1 , wherein a yellowness index is 5 or less when the interlayer film for laminated glass is set to have a thickness of 760 μm and sandwiched between two glass plates.

12. The interlayer film for laminated glass according to claim 1 , wherein a visible light transmission Tv is 70% or more after the interlayer film for laminated glass is set to have a thickness of 760 μm, sandwiched between two glass plates, and irradiated with ultraviolet rays for 2,000 hours using an ultraviolet rays irradiation device in accordance with JIS R 3205 (1998).

13. The interlayer film for laminated glass according to claim 1 , wherein a yellowness index is 5 or less after the interlayer film for laminated glass is set to have a thickness of 760 μm, sandwiched between two glass plates, and irradiated with ultraviolet rays for 2,000 hours using an ultraviolet ray irradiation device in accordance with JIS R 3205 (1998).

14. The interlayer film for laminated glass according to claim 1 , wherein the interlayer film for laminated glass has an absolute value of 1 or less, where the absolute value is given by the difference between the transmittance of ultraviolet rays with a wave length of 400 nm of the interlayer film for laminated glass, after being set to have a thickness of 760 μm and sandwiched between two glass plates, and the transmittance of ultraviolet rays with a wave length of 400 nm of the interlayer film for laminated glass, after being set to have a thickness of 760 μm, sandwiched between two glass plates, and irradiated with ultraviolet rays for 2,000 hours using an ultraviolet ray irradiation device in accordance with JIS R 3205 (1998).

15. A laminated glass comprising:
the interlayer film for laminated glass according to claim 1 , and
two glass plates,
wherein the interlayer film for laminated glass is sandwiched between the two glass plates.

16. The laminated glass according to claim 15 , wherein the glass plates are made of 2-mm-thick green glass.

Assignees

• Hatta Bungo
• Nakayama Kazuhiko
• Inada Minoru
• Masaki Yuji
• Hikata Jun
• Sekisui Chemical Co Ltd
• Asahi Glass Co Ltd

Inventors

• Hatta Bungo
• Nakayama Kazuhiko
• Inada Minoru
• Masaki Yuji
• Hikata Jun

Classifications

• G02B5/223

  containing organic substances, e.g. dyes, inks or pigments · CPC title

• C08K5/3417

  condensed with carbocyclic rings · CPC title

• B32B17/10761

  containing vinyl acetal · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title

• B32B17/10678 Primary

  comprising UV absorbers or stabilizers, e.g. antioxidants · CPC title