Durable polyolefin adhesive material for solar modules

Patent metadata

Field	Value
Publication number	US-9379263-B2
Application number	US-201214355920-A
Country	US
Kind code	B2
Filing date	Aug 9, 2012
Priority date	Nov 4, 2011
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

This disclosure generally relates to films capable of use in electronic device modules and to electronic device modules including such films. The disclosure also generally relates to materials for use in such films.

First claim

What is claimed is:

1. A film capable of use in a photovoltaic solar module, comprising:
a first low crystalline ethylene/α-olefin copolymer with a DSC peak melting point less than or equal to 50° C.;
a second low crystalline ethylene/α-olefin copolymer with a DSC peak melting point greater than 50° C.;
a silane; and
one or more cross-linking agents.

2. The film of claim 1 , wherein the silane is an unsaturated alkoxysilane.

3. The film of claim 1 , wherein the one or more cross-linking agents are one of a thermal curative and a photo-curative.

4. The film of claim 1 , wherein the α-olefin of one of the two low crystalline ethylene/α-olefin copolymers is a butene α-olefin.

5. The film of claim 1 , further comprising a coagent.

6. The film of claim 1 , further comprising an additional resin.

7. The film of claim 1 , wherein the α-olefin of the first low crystalline ethylene/α-olefin copolymer is a butene α-olefin and the α-olefin of the second low crystalline ethylene/α-olefin copolymer is an octene α-olefin.

8. The film of claim 1 , wherein the film includes greater than 70% by weight of first and second low crystalline ethylene/α-olefin copolymer.

9. The film of claim 1 , wherein, after exposure to damp heat conditions of 85° C. and 85% relative humidity for 1000 hrs, the percent transmittance averages at least 90% over a wavelength range of 400-1100 nm.

10. The film of claim 1 , wherein, after exposure to damp heat conditions of 85° C. and 85% relative humidity for 120 hrs, the adhesion of the film is greater than 100 N/cm.

11. A film capable of use in a photovoltaic solar module, comprising:
a first polyolefin with a DSC peak melting point less than or equal to 50° C.;
a second polyolefin with a DSC peak melting point greater than 50° C.;
a silane; and
one or more cross-linking agents;
wherein the percent transmittance averages at least 90% over a wavelength range of 400-1100 nm after exposure to damp heat conditions of 85° C. and 85% relative humidity for 1000 hrs.

12. The film of claim 11 , wherein at least one of the first and second polyolefins is an ethylene/α-olefin copolymer.

13. The film of claim 11 , wherein the silane is an unsaturated alkoxysilane.

14. The film of claim 11 , wherein the one or more cross-linking agents are one of a thermal curative and a photo-curative.

15. The film of claim 11 , further comprising an additional resin.

16. The film of claim 11 , wherein the α-olefin of the first low crystalline ethylene/α-olefin copolymer is a butene α-olefin and the α-olefin of the second low crystalline ethylene/α-olefin copolymer is an octene α-olefin.

17. The film of claim 11 , wherein the film includes greater than 70% by weight of first and second low crystalline ethylene/α-olefin copolymer.

18. The film of claim 11 , wherein, after exposure to damp heat conditions of 85° C. and 85% relative humidity for 1000 hrs, the percent transmittance averages at least 90% over a wavelength range of 400-1100 nm.

19. The film of claim 11 , wherein, after exposure to damp heat conditions of 85° C. and 85% relative humidity for 120 hrs, the adhesion of the film is greater than 100 N/cm.

Assignees

• Rasal Rahul M
• Jennen Jay M
• Linert Jeffrey G
• Erdogan-Haug Belma
• Clough Robert S
• 3M Innovative Properties Co

Inventors

• Rasal Rahul M
• Jennen Jay M
• Linert Jeffrey G
• Erdogan-Haug Belma
• Clough Robert S

Classifications

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• C08L2312/08

  by silane · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L23/26

  modified by chemical after-treatment (saponified copolymers C08L23/0861; unsaturated acid salts C08L23/0876) · CPC title

• C08L2203/206

  use in coating or encapsulating of electronic parts · CPC title