Laminated glass, and method for manufacturing laminated glass

Patent metadata

Field	Value
Publication number	US-11899317-B2
Application number	US-202318106790-A
Country	US
Kind code	B2
Filing date	Feb 7, 2023
Priority date	Aug 21, 2020
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

To provide a laminated glass in which color shading of an optical member is reduced, and a method for producing it.
A laminated glass comprising
a first glass plate, a second glass plate facing the first glass plate, and between the first glass plate and the second glass plate, a light control member to which a power feeder is connected, a bonding portion and a sealing member, wherein the sealing member overlaps with at least a part of the periphery of the first glass plate, in a plan view, the bonding portion is in contact with the first glass plate, the second glass plate, and a first principal surface, a second principal surface and side surfaces of the light control member, and the bonding portion contains a curable transparent resin.

First claim

What is claimed is:

1. A laminated glass comprising
a first glass plate,
a second glass plate facing the first glass plate, and
between the first glass plate and the second glass plate, a light control member to which a power feeder is connected, a bonding portion and a sealing member,
wherein the sealing member overlaps with at least a part of the periphery of the first glass plate, in a plan view,
the bonding portion is in contact with the first glass plate, the second glass plate, and a first principal surface, a second principal surface and side surfaces of the light control member, and
the bonding portion contains a curable transparent resin.

2. The laminated glass according to claim 1 , wherein the sealing member is in contact with at least one of the first glass plate and the second glass plate.

3. The laminated glass according to claim 1 , wherein the bonding portion has a first adhesive layer,
the curable transparent resin in the bonding portion is contained in the first adhesive layer, and
the first adhesive layer is in contact with the first glass plate, the sealing member, and a first principal surface and side surfaces of the light control member.

4. The laminated glass according to claim 3 , wherein the first adhesive layer is in contact with the second glass plate.

5. The laminated glass according to claim 3 , wherein the first adhesive layer has a thickness of 1 μm or more and 1000 μm or less.

6. The laminated glass according to claim 3 , wherein the first adhesive layer has a shear modulus at 25° C. of 1.0×10 3 Pa or more and 2.0×10 5 Pa or less.

7. The laminated glass according to claim 3 , wherein the bonding portion has a second adhesive layer,
the second adhesive layer has a transparent pressure-sensitive adhesive sheet, and
the second adhesive layer is in contact with the first adhesive layer, a second principal surface of the light control member and the second glass plate.

8. The laminated glass according to claim 3 , wherein
the bonding portion has a second adhesive layer and a third adhesive layer,
the second adhesive layer has a transparent pressure-sensitive adhesive sheet, and
between the second adhesive layer and the third adhesive layer, there is a resin film,
the second adhesive layer is in contact with the resin film and the second glass plate, and
the third adhesive layer is in contact with the resin film and a second principal surface of the light control member.

9. The laminated glass according to claim 7 , wherein the second adhesive layer is in contact with the sealing member.

10. The laminated glass according to claim 7 , wherein the second adhesive layer has a thickness of 1 μm or more and 1000 μm or less.

11. The laminated glass according to claim 7 , wherein the second adhesive layer has a shear modulus at 25° C. of 1.0×10 3 Pa or more and 2.0×10 5 Pa or less.

12. The laminated glass according to claim 1 , wherein the bonding portion has an ultraviolet absorber.

13. The laminated glass according to claim 12 , wherein the ultraviolet absorber contains at least one member selected from the group consisting of a benzophenone compound, a benzotriazole compound, a triazine compound, an azomethine compound, an indole compound, a dibenzoyl resorcinol derivative, a benzodithiol compound and an oxazolone compound.

14. The laminated glass according to claim 12 , wherein the ultraviolet absorber is an ultraviolet absorber having a moiety with high compatibility with the curable transparent resin bonded.

15. The laminated glass according to claim 12 , wherein the curable transparent resin contains a silicone curable transparent resin, and the ultraviolet absorber contains a silicone-modified ultraviolet absorber.

16. The laminated glass according to claim 12 , wherein the bonding portion has a transmittance for ultraviolet light having a wavelength of 380 nm of 0% or more and 20% or less.

17. The laminated glass according to claim 1 , wherein both the first glass plate and the second glass plate have a curved shape.

18. The laminated glass according to claim 1 , wherein the light control member has a light control device containing a liquid crystal.

19. The laminated glass according to claim 18 , wherein the light control device has a rotational viscosity at 25° C. of 2000 mPa·s or less.

20. A method for producing a laminated glass comprising a first glass plate,
a second glass plate facing the first glass plate, and
between the first glass plate and the second glass plate, a light control member to which a power feeder is connected, a bonding portion and a sealing member,
which comprises a forming step of forming the sealing member on at least a part of the periphery of at least one of the first glass plate and the second glass plate in a plan view and forming the bonding portion containing a curable transparent resin on a principal surface of at least one of the first glass plate and the second glass plate,
a laminating step of forming a laminate in which the first glass plate, the bonding portion and the second glass plate are laminated in this order, and the bonding portion is in contact with the first glass plate, the second glass plate, and a first principal surface, a second principal surface and side surfaces of a light control member to which a power feeder is connected, and
a bonding step of bonding the first glass plate, the bonding portion, the second glass plate and the sealing member with one another in the laminate.

21. The method for producing a laminated glass according to claim 20 , wherein in the bonding step, the absolute pressure applied to the bonding portion is less than 0.5 MPa and the temperature applied to the bonding portion is less than 120° C.

22. The method for producing a laminated glass according to claim 21 , wherein in the bonding step, the temperature applied to the bonding portion is less than 100° C.

Assignees

• Agc Inc

Inventors

• Kakuta Junichi
• Shibuya Takashi
• Kimura Risa
• Gima Yuhei

Classifications

• G02F1/1339 Primary

  Gaskets; Spacers; Sealing of cells · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title

• B32B17/10302

  Edge sealing · CPC title

• B32B17/10504

  Liquid crystal layer · CPC title