Laminated optical article

• US 20060029784A1
• Filed: 08/09/2004
• Published: 02/09/2006
• Est. Priority Date: 08/09/2004
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Schaffer, Kevin R., Zhu, Dong-Wei, Franchina, Nicole L., Doan, Mai-Chi
• Application Number:
  US10/914,555
• Publication Number:
  US 20060029784A1
• Time in Patent Office: Days
• US Class Current: 428/220
• CPC Class Codes: C08L 33/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: G02B 1/04 made of organic materials, e.g. plastics G02B1/08 takes precedence
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

A laminated optical article comprising at least one optical film bonded with an adhesive composition.

Claims

1. A laminated optical article comprising:

a polarizing layer disposed between a first optical film and a second optical film wherein the polarizing layer is bonded to the optical films with an adhesive composition comprising the reaction product of

at least one nitrogen-containing polymer, and

at least one polymerizable ethylenically unsaturated diluent.

2. The laminated article of claim 1 wherein the first and second optical film are independently selected from the group consisting of a prism film, a light guide, and a diffusive film.

3. The laminated article of claim 1 wherein the first optical film is the same as the second optical film.

4. The laminated article of claim 1 wherein the first optical film is different than the second optical film.

5. The laminated article of claim 1 wherein the article has a change in delta b* of less than 2 after accelerated aging.

6. The laminated article of claim 1 wherein the article has a stiffness of at least 60 lbs-force per inch width per inch thickness.

7. The laminated article of claim 1 wherein the polarizing layer has a thickness of less than 5 mils.

8. The laminated article of claim 1 wherein the article has a thickness of no greater than about 500 microns.

9. The laminated article of claim 1 wherein the bond between the polarizing layer and the optical film has a T-peel of at least about 0.35 lbs/inch width.

10. The laminated article of claim 1 wherein the article has an initial transmission of at least 35%.

11. The laminated article of claim 1 wherein the article has an initial haze of at least 60%.

12. The laminated article of claim 1 wherein the article has a gain of at least 1.3.

13. A display article comprising a light source, a display, and the laminated optical article of claim 1 disposed between the light source and the display.

14. The display article of claim 13 wherein the article is a liquid crystal display.

15. The display article of claim 14 wherein the display is selected from the group consisting of a mobile telephone, hand-held computer device, personal data assistant, electronic game, computer monitor, and a television screen.

16. An article comprising

a substrate having a surface layer comprising poly(ethylene naphthalate);

and an adhesive disposed on the surface layer wherein the adhesive comprises the reaction product of

at least one nitrogen-containing polymer, and

at least one polymerizable ethylenically unsaturated diluent.

17. The article of claim 16 wherein the substrate comprises a copolymer and the amount of poly(ethylene naphthalate) is at least about 50 wt-%.

18. The article of claim 16 wherein the substrate is an optical film.

19. The article of claim 18 wherein the optical film is a polarizer.

20. The article of claim 16 wherein the polarizer is selected from the group comprising a reflective polarizer and an absorptive polarizer.

21. The article of claim 18 wherein the adhesive bonds the optical film to an optical component.

22. The article of claim 21 wherein the optical component is selected from the group consisting of a prism film, a light guide, a diffusive film, a transparent plate, and a diffusive plate.

23. The article of claim 16 wherein the article is a liquid crystal display.

24. The article of claim 23 wherein the display is selected from the group consisting of a mobile telephone, hand-held computer device, personal data assistant, electronic game, computer monitor, and a television screen.

25. A laminated optical article comprising at least two optical components selected from the group consisting of a prism film, a polarizing film, a light guide, a diffusive film, a transparent plate, and a diffusive plate bonded with an adhesive composition wherein the article has a change in delta b* of less than 2 after accelerated aging.

26. A laminated optical article comprising at least three optical films selected from the group consisting of a prism film, a polarizing film, a light guide, and a diffuser film bonded with an adhesive composition wherein the article has a stiffness of at least 65 lbs-force per inch width per inch thickness.

27. A laminated optical article comprising a polarizing layer having a thickness of less than 5 mils bonded to an optical component.

28. The laminated optical article of claim 27 wherein the article has a stiffness of at least 60 lbs-force per inch width per inch thickness.