FLUOROPOLYMER/PARTICULATE FILLED PROTECTIVE SHEET

• US 20110014476A1
• Filed: 04/14/2010
• Published: 01/20/2011
• Est. Priority Date: 10/13/2008
• Status: Abandoned Application

• Current Assignee: Saint-Gobain Performance Plastics Corporation (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Performance Plastics Corporation (Compagnie De Saint-Gobain)
• Inventors: Guy, Philip C., Conley, Karen, Dicorleto Gibson, Julia, Csillag, Frank J.
• Application Number:
  US12/760,163
• Publication Number:
  US 20110014476A1
• Time in Patent Office: Days
• US Class Current: 428/412
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2307/204 Di-electric
• CPC Class Codes: B32B 2307/41 Opaque
• CPC Class Codes: B32B 2307/416 Reflective
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2457/12 Photovoltaic modules
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/16 specially treated, e.g. irradiated
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/28 comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated

Abstract

The invention describes a particulate filled film, useful as a backsheet for a photovoltaic construct.

Claims

1. A multilayer film comprising:

a first layer comprising an aqueous or solvent castable fluoropolymer and a particulate filler material;

a second layer, having top and bottom sides, selected from a polyimide, a polycarbonate or aluminum; and

a third layer comprising an aqueous or solvent castable fluoropolymer and a particulate filler material, wherein the first layer is disposed on the top side and the third layer is disposed on the bottom side of the second layer.

2. The multilayer film of claim 1, wherein the fluoropolymers are each independently is selected from polytetrafluoroethylene, polyvinylidenefluoride, polychlorotrifluoroethlylene, polyvinylfluoride, tetrafluoroethylene/hexafluoropropylene/ethylene copolymer, chlorotrifluoroethylene/vinylidenefluoride copolymer, chlorotrifluoroethylene/hexafluoropropylene, chlorotrifluoroethylene/ethylene copolymers, ethylene/trifluoroethylene copolymers, ethylene/tetrafluoroethylene copolymers, tetrafluoroethylene/hexafluoropropylene copolymers, tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers or mixtures thereof.

3. The multilayer film of claim 1, wherein the particulate fillers are each independently selected from silica particles, glass beads, glass microspheres, glass fibers, titanium dioxide particles, barium titanate particles, calcium carbonate, zinc oxide, mica, clay, talc, iron oxide, carbon black, zinc sulfide, barium sulfate, zinc sulfite, cobalt aluminate blue, sodium alumino sulphosilicate, magnesium hydroxide, antimony trioxide, organophosphates, brominated compounds or mixtures thereof.

4. The multilayer film of claim 1, wherein the fluoropolymers are each independently selected from polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers (PFA), ethylene/tetrafluoroethylene copolymers (ETFE), fluorinated ethylene propylene copolymers (FEP), polyvinylidenefluoride (PVDF), polychlorotrifluoroethlylene (PCTFE) or mixtures thereof and the particulate filler of the fluoropolymer layers is titanium dioxide.

5. The multilayer film of claim 1, wherein the dielectric break down strength (kV) is greater than 3 kV measured by ASTM method D3755.

6. The multilayer film of claim 1, wherein the solar reflectance is greater than 70% measured by ASTM method E424.

7. The multilayer film of claim 1, wherein the water vapor transmission rate is less than about 20 g/m²/day measured by ASTM method F1249.

8. An optoelectronic device comprising:

an optoelectronic component and the multilayer film of claim 1, wherein the optoelectronic component and the multilayer film are packaged together.

9. The optoelectronic device of claim 8, wherein the multilayer film is a backsheet to the optoelectronic component.

10. A multilayer film comprising:

a first layer comprising an aqueous or solvent castable fluoropolymer and a particulate filler material; and

a second layer having top and bottom sides selected from a polyimide, a polycarbonate or aluminum, wherein the first layer is disposed on one side of the second layer.

11. The multilayer film of claim 10, wherein the fluoropolymer is selected from polytetrafluoroethylene, polyvinylidenefluoride, polychlorotrifluoroethlylene, polyvinylfluoride, tetrafluoroethylene/hexafluoropropylene/ethylene copolymer, chlorotrifluoroethylene/vinylidenefluoride copolymer, chlorotrifluoroethylene/hexafluoropropylene, chlorotrifluoroethylene/ethylene copolymers, ethylene/trifluoroethylene copolymers, ethylene/tetrafluoroethylene copolymers, tetrafluoroethylene/hexafluoropropylene copolymers, tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers or mixtures thereof.

12. The multilayer film of claim 10, wherein the particulate filler is selected from silica particles, glass beads, glass microspheres, glass fibers, titanium dioxide particles, barium titanate particles, calcium carbonate, zinc oxide, mica, clay, talc, iron oxide, carbon black, zinc sulfide, barium sulfate, zinc sulfite, cobalt aluminate blue, sodium alumino sulphosilicate, magnesium hydroxide, antimony trioxide, organophosphates, brominated compounds or mixtures thereof.

13. The multilayer film of claim 10, wherein the fluoropolymer is selected from polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers (PFA), ethylene/tetrafluoroethylene copolymers (ETFE), fluorinated ethylene propylene copolymers (FEP), polyvinylidenefluoride (PVDF), polychlorotrifluoroethlylene (PCTFE) or mixtures thereof and the particulate filler of the fluoropolymer layer is titanium dioxide.

14. The multilayer film of claim 10, wherein the dielectric break down strength (kV) is greater than 3 kV measured by ASTM method D3755.

15. The multilayer film of claim 10, wherein the solar reflectance is greater than 70% measured by ASTM method E424.

16. The multilayer film of claim 10, wherein the water vapor transmission rate is less than about 20 g/m²/day measured by ASTM method F1249.

17. An optoelectronic device comprising:

an optoelectronic component and the multilayer film of claim 10, wherein the optoelectronic component and the multilayer film are packaged together.

18. The optoelectronic device of claim 17, wherein the multilayer film is a backsheet to the optoelectronic component.

19. A process to prepare a multilayer film comprising the steps:

coating a casting composition onto a polyimide, polycarbonate or aluminum support, wherein the casting composition comprises;

a carrier;

an aqueous or solvent castable fluoropolymer; and

a particulate filler material.

20. The method of claim 19, further comprising the step of drying the multilayer film.

21. The method of claim 19, wherein the fluoropolymer is selected from polytetrafluoroethylene, polyvinylidenefluoride, polychlorotrifluoroethlylene, polyvinylfluoride, tetrafluoroethylene/hexafluoropropylene/ethylene copolymer, chlorotrifluoroethylene/vinylidenefluoride copolymer, chlorotrifluoroethylene/hexafluoropropylene, chlorotrifluoroethylene/ethylene copolymers, ethylene/trifluoroethylene copolymers, ethylene/tetrafluoroethylene copolymers, tetrafluoroethylene/hexafluoropropylene copolymers, tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers or mixtures thereof.

22. The method of claim 19, wherein the particulate filler is selected from silica particles, glass beads, glass microspheres, glass fibers, titanium dioxide particles, barium titanate particles, calcium carbonate, zinc oxide, mica, clay, talc, iron oxide, carbon black, zinc sulfide, barium sulfate, zinc sulfite, cobalt aluminate blue, sodium alumino sulphosilicate, magnesium hydroxide, antimony trioxide, organophosphates, brominated compounds or mixtures thereof.

23. The method of claim 19, wherein the fluoropolymer is selected from polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers (PFA), ethylene/tetrafluoroethylene copolymers (ETFE), fluorinated ethylene propylene copolymers (FEP), polyvinylidenefluoride (PVDF), polychlorotrifluoroethlylene (PCTFE) or mixtures thereof and the particulate filler of the fluoropolymer layer is titanium dioxide.

24. The method of claim 19, wherein the dielectric break down strength (kV) is greater than 3 kV measured by ASTM method D3755.

25. The method of claim 19, wherein the solar reflectance is greater than 70% measured by ASTM method E424.

26. The method of claim 19, wherein the water vapor transmission rate is less than about 20 g/m²/day measured by ASTM method F1249.

27. A process to prepare a multilayer film comprising the steps:

coating a first casting composition onto a top side of a polyimide, polycarbonate or aluminum support, wherein the first casting composition comprises;

a carrier;

an aqueous or solvent castable fluoropolymer; and

a particulate filler material;

coating a second casting composition onto a bottom side of the polyimide, polycarbonate or aluminum support, wherein the second casting composition comprises;

a carrier;

an aqueous or solvent castable fluoropolymer; and

a particulate filler material.

28. The method of claim 27, further comprising the step of drying the multilayer film.

29. The method of claim 27, wherein the fluoropolymers are each independently selected from polytetrafluoroethylene, polyvinylidenefluoride, polychlorotrifluoroethlylene, polyvinylfluoride, tetrafluoroethylene/hexafluoropropylene/ethylene copolymer, chlorotrifluoroethylene/vinylidenefluoride copolymer, chlorotrifluoroethylene/hexafluoropropylene, chlorotrifluoroethylene/ethylene copolymers, ethylene/trifluoroethylene copolymers, ethylene/tetrafluoroethylene copolymers, tetrafluoroethylene/hexafluoropropylene copolymers, tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers or mixtures thereof.

30. The method of claim 27, wherein the particulate fillers are each independently selected from silica particles, glass beads, glass microspheres, glass fibers, titanium dioxide particles, barium titanate particles, calcium carbonate, zinc oxide, mica, clay, talc, iron oxide, carbon black, zinc sulfide, barium sulfate, zinc sulfite, cobalt aluminate blue, sodium alumino sulphosilicate, magnesium hydroxide, antimony trioxide, organophosphates, brominated compounds or mixtures thereof.

31. The method of claim 27, wherein the fluoropolymers are each independently selected from polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers (PFA), ethylene/tetrafluoroethylene copolymers (ETFE), fluorinated ethylene propylene copolymers (FEP), polyvinylidenefluoride (PVDF), polychlorotrifluoroethlylene (PCTFE) or mixtures thereof and the particulate filler of the fluoropolymer layer is titanium dioxide.

32. The method of claim 27, wherein the dielectric break down strength (kV) is greater than 3 kV measured by ASTM method D3755.

33. The method of claim 27, wherein the solar reflectance is greater than 70% measured by ASTM method E424.

34. The method of claim 27, wherein the water vapor transmission rate is less than about 20 g/m²/day measured by ASTM method F1249.