Solar control multilayer film

• US 20060154049A1
• Filed: 12/21/2005
• Published: 07/13/2006
• Est. Priority Date: 01/07/2005
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Weber, Michael F., Padiyath, Raghunath, Thomas, Cristina U., Marttila, Charles A.
• Granted Patent: US 7,632,568 B2
• Time in Patent Office: Days
• US Class Current: 428/328
• CPC Class Codes: B32B 17/10 of synthetic resin
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/1033 Laminated safety glass or glazing containing temporary protective coatings or layers
• CPC Class Codes: B32B 17/10807 Making laminated safety glass or glazing; Apparatus therefor
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02B 5/282 reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
• CPC Class Codes: G02B 5/287 comprising at least one layer of organic material
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

A multilayer film article is disclosed. The multilayer film article includes an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type, an infrared light absorbing nanoparticle layer including a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder and having a thickness in a range from 1 to 20 micrometers. The nanoparticle layer being disposed adjacent the multilayer film. The metal oxide nanoparticles include tin oxide or doped tin oxide.

Claims

1. A multilayer film article comprising:

an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type; and

an infrared light absorbing nanoparticle layer comprising a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the multilayer film and the metal oxide comprising tin oxide or doped tin oxide, the infrared light absorbing nanoparticle layer having a thickness in a range from 1 to 20 micrometers.

2. A multilayer film article according to claim 1 wherein the metal oxide nanoparticles comprises antimony tin oxide, doped antimony tin oxide, or indium doped tin oxide dispersed in a cured polyacrylate binder.

3. A multilayer film article according to claim 1 wherein the metal oxide nanoparticles further comprises antimony oxide or indium oxide dispersed in a cured polyacrylate binder.

4. A multilayer film article according to claim 1 wherein the infrared light absorbing nanoparticle layer has a thickness in a range from 1 to 10 micrometers.

5. A multilayer film article according to claim 1 wherein the nanoparticle layer comprises 50 to 80 wt % metal oxide nanoparticles.

6. A multilayer film article according to claim 1 wherein the first polymer type comprises polyethylene terephthatlate or a copolymer of polyethylene terephthatlate of and the second polymer type comprises poly(methyl methylacrylate) or a copolymer of poly(methyl methylacrylate).

7. A multilayer film article according to claim 1 wherein the first polymer type comprises cyclohexanedimethanol or a copolymer of cyclohexanedimethanol and the second polymer type comprises polyethylene naphthalate or a copolymer of polyethylene naphthalate.

8. A multilayer film article according to claim 1 further comprising a pressure sensitive adhesive layer disposed on the multilayer film, the multilayer film being disposed between the pressure sensitive adhesive layer and the infrared light absorbing nanoparticle layer.

9. A multilayer film article according to claim 8 further comprising a release liner dispose on the pressure sensitive adhesive layer, the pressure sensitive adhesive layer disposed between the release liner and the multilayer film.

10. A multilayer film article according to claim 1 further comprising an infrared light reflecting pigment layer disposed adjacent the multilayer film.

11. A light control article for blocking infrared light from an infrared light source comprising:

an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type;

an infrared light absorbing nanoparticle layer comprising a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the multilayer film and the metal oxide comprising tin oxide or doped tin oxide, the infrared light absorbing nanoparticle layer having a thickness in a range from 1 to 20 micrometers, wherein the infrared light reflecting multilayer film is disposed between an infrared light source and the infrared light absorbing nanoparticle layer; and

a glass substrate disposed adjacent either the infrared light absorbing nanoparticle layer or the infrared light reflecting multilayer film.

12. A light control article according to claim 11 wherein the wherein the first polymer type comprises polyethylene terephthatlate or a copolymer of polyethylene terephthatlate of and the second polymer type comprises poly(methyl methylacrylate) or a copolymer of poly(methyl methylacrylate).

13. A light control article according to claim 11 further comprising a pressure sensitive adhesive layer disposed between the infrared light reflecting multilayer film and the glass substrate.

14. A light control article according to claim 11 wherein the infrared light absorbing nanoparticle layer has a thickness in a range from 1 to 10 micrometers.

15. A light control article according to claim 11 further comprising an infrared light reflecting pigment layer disposed adjacent the multilayer film.

16. A multilayer film article comprising:

an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type;

an infrared light absorbing nanoparticle layer comprising a plurality of metal oxide nanoparticles dispersed in a cured polymeric binder, the infrared light absorbing nanoparticle layer being adjacent the multilayer film and the metal oxide comprising tin oxide or doped tin oxide, the infrared light absorbing nanoparticle layer having a thickness in a range from 1 to 20 micrometers;

the multilayer film article having an average visible light transmission of at least 45% and an average infrared light transmission for 780 nm to 2500 nm light of less than 15%.

17. A multilayer film article according to claim 16 wherein the multilayer film article has an average visible light transmission of at least 60% and an infrared light transmission of 20% or less for substantially all wavelengths between 950 nm and 2500 nm.

18. A multilayer film article according to claim 16 wherein the multilayer film article has an average light reflection between 780 and 1200 nm of 50% or greater and an average light transmission between 1400 and 2500 nm of 50% or less.

19. A multilayer film article according to claim 16 wherein the multilayer film article has an average light reflection between 780 and 1200 nm of 80% or greater and an average light transmission between 1400 and 2500 nm of 20% or less.

20. A multilayer film article according to claim 16 wherein the multilayer film article has an average light reflection between 780 and 1200 nm of 90% or greater and an average light transmission between 1400 and 2500 nm of 5% or less.

21. A multilayer film article according to claim 16 further comprising a pressure sensitive adhesive layer disposed on the multilayer film, the multilayer film being disposed between the pressure sensitive adhesive layer and the nanoparticle layer.

22. A multilayer film article according to claim 16 wherein the infrared light absorbing nanoparticle layer has a thickness in a range from 1 to 10 micrometers.

23. A multilayer film article according to claim 16 further comprising an infrared light reflecting pigment layer disposed adjacent the multilayer film. (e.g.,