LAMINATE FOR A SOLAR BATTERY BACK-SHEET AND BACK-SHEET COMPRISNG SAME

• US 20110023945A1
• Filed: 04/24/2009
• Published: 02/03/2011
• Est. Priority Date: 04/28/2008
• Status: Abandoned Application

• Current Assignee: Asahi Kasei Chemicals Corporation (Asahi Kasei Corporation)
• Original Assignee: Asahi Kasei Chemicals Corporation (Asahi Kasei Corporation)
• Inventors: Murakami, Masahiro, Azuma, Kouichirou, Mori, Motoyoshi, Hayashi, Mikine
• Application Number:
  US12/936,355
• Publication Number:
  US 20110023945A1
• Time in Patent Office: Days
• US Class Current: 136/251
• CPC Class Codes: B32B 2327/00 Polyvinylhalogenides
• CPC Class Codes: B32B 2333/08 Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: C09D 127/08 Homopolymers or copolymers of vinylidene chloride
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/049 Protective back sheets
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

Provided is a laminate for a solar battery back-sheet, which is capable of exhibiting and maintaining an excellent water-vapor barrier property even under a severe natural environment for a long time, i.e., excellent in weather resistance and humidity resistance, and which is produced by laminating a vinylidene chloride-based resin layer and a silicone-modified acrylic-based resin layer.

Claims

1. A laminate for a solar battery back-sheet comprising:

a vinylidene chloride-based resin layer; and

a silicone-modified acrylic-based resin layer laminated on the vinylidene chloride-based resin layer, wherein a ratio of a vinylidene chloride monomer in total amount of monomer constituting the vinylidene chloride-based resin layer is not less than 50% by mass.

2. The laminate for the solar battery back-sheet according to claim 1, wherein the vinylidene chloride-based resin layer and the silicone-modified acrylic-based resin layer are laminated in direct contact with each other.

3. The laminate for the solar battery back-sheet according to claim 1 or 2, wherein the vinylidene chloride-based resin layer is produced from a vinylidene chloride lacquer obtained by dissolving a vinylidene chloride-based resin powder in an organic solvent, or from a vinylidene chloride emulsion.

4. The laminate for the solar battery back-sheet according to claim 1, wherein the silicone-modified acrylic-based resin layer is produced from a silicone-modified acrylic emulsion.

5. The laminate for the solar battery back-sheet according to claim 4, wherein the silicone-modified acrylic emulsion contains a silicone resin and an acrylic resin.

6. The laminate for the solar battery back-sheet according to claim 5, wherein when the acrylic resin is produced by emulsion polymerization, the silicone-modified acrylic emulsion is obtained by adding a silicone modifier in at least any one of the steps of before the emulsion polymerization, during the emulsion polymerization and after the emulsion polymerization.

7. The laminate for the solar battery back-sheet according to any one of claims 4 to 6, wherein a UV ray absorbent and/or a photostabilizer are blended in the silicone-modified acrylic emulsion.

8. The laminate for the solar battery back-sheet according to any one of claims 4 to 6, wherein the silicone-modified acrylic emulsion is blended with a pigment and used as a paint.

9. The laminate for the solar battery back-sheet according to claim 1, wherein the vinylidene chloride-based resin layer is a coating layer with a vinylidene chloride lacquer or a vinylidene chloride emulsion and the silicone-modified acrylic-based resin layer is a coating layer with a silicone-modified acrylic emulsion.

10. The laminate for the solar battery back-sheet according to claim 9, wherein a thickness of the vinylidene chloride-based resin coating layer is 5 to 50 μ

m and a thickness of the silicone-modified acrylic-based resin coating layer is 10 to 100 μ

m.

11. A solar battery back-sheet comprising a base material and the laminate for the solar battery back-sheet according to claim 1, wherein the laminate for the solar battery back-sheet is laminated on the base material.

12. The solar battery back-sheet according to claim 11, wherein the base material is a plastic base material.

13. The solar battery back-sheet according to claim 11, wherein the vinylidene chloride-based resin layer and the base material are laminated with an adhesive interposed between them.

14. The solar battery back-sheet according to claim 12, wherein the plastic base material is formed of a polyethylene terephthalate-based resin.

15. The solar battery back-sheet according to claim 14, wherein the polyethylene terephthalate-based resin is a hydrolysis resistant resin.

16. A solar battery module comprising the solar battery back-sheet according to any one of claims 11 to 15.

17. (canceled)