Fluoropolymer blend anti-reflection coatings and coated articles

• US 5,139,879 A
• Filed: 11/21/1991
• Issued: 08/18/1992
• Est. Priority Date: 09/20/1991
• Status: Expired due to Fees

• Current Assignee: Alliedsignal Inc.
• Original Assignee: Alliedsignal Inc.
• Inventors: Nahata, Ajay, Yardley, James T., Aharoni, Shaul M.
• Primary Examiner(s): SECCURO JR, CARMAN J
• Application Number:
  US07/796,516
• Time in Patent Office: 271 Days
• Field of Search: 525/200, 428/422
• US Class Current: 428/422
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 27/12 containing fluorine atoms
• CPC Class Codes: C08L 33/16 Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: C09D 127/12 containing fluorine atoms
• CPC Class Codes: C09D 133/16 Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated

Abstract

Solid bodies having a reflective surface are provided with an anti-reflection coating of a fluoropolymer blends of (1) a terpolymer composition derived from (a) perfluoroalkylakyl acrylate or methacrylate, (b) acrylic, methacrylic or itaconic acid, and (c) hydroxyl- containing acrylate or methacrylate; and (2) an amorphous fluoropolymer.

Claims

1. A solid body having a reflective surface, having deposited thereon as an anti-reflection coating a layer of a polymeric composition comprising a blend of

(a) from about 1 to about 95 percent by weight of amorphous fluoropolymer, with

(b) from about 5 to about 99 percent by weight of a fluorinated copolymer having a polymer chain composed of

View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)

2. A solid body according to claim 1 wherein the amorphous fluoropolymer in said blend is a copolymer of tetrafluoroethylene and a comonomer selected from the group consisting of CH₂ ═

CHF;

CH₂ ═

CF₂ ;

CF₂ ═

CHF;

CH₂ ═

CH--C_n F_2n=1 ;

CF₂ ═

CClF;

CF₂ ═

CF--CF₃ ;

CF₂ ═

CF--O--C_n F_2n=1 ;

CF₂ ═

CF--O--CF₂ CF(CF₃)--O--CF₂ CF₂ SO₂ F;

CF₂ ═

CF--O--CF₂ CF(CF₃)--O--CF₂ CF₂ COOCH₃ and ##STR11## and mixtures thereof.

3. A solid body according to claim 1 wherein the amorphous fluoropolymer in said blend is a copolymer of tetrafluoroethylene and ##STR12##

4. An anti-reflection coated solid body according to claim 1 wherein in said fluorinated copolymer R¹ is H.

5. An anti-reflection coated solid body according to claim 1 wherein in said fluorinated copolymer R¹ is --CH₃.

6. An anti-reflection coated solid body according to claim 1 wherein in said fluorinated copolymer X represents a mixture of units bearing H and --CH₃ as R¹ substituents.

7. An anti-reflection coated solid body according to any one of claims 1, 2 or 3 wherein Y and Z are present in about equimolar proportions.

8. An anti-reflection coated solid body according to any one of claims 1 through 6 wherein said fluorinated copolymer is cross-linked.

9. An anti-reflection coated solid body according to claim 8, wherein cross-linking of said fluorinated copolymer was effected by heat treatment at temperature between about 120°

C. and about 180°

C. for time sufficient to effect cross-linking.

10. An anti-reflection coated solid body according to claim 8, wherein cross-linking was effected by means of a cross-linking agent.

11. An anti-reflection coated solid body according to any one of claim 8 which is transparent.

12. An anti-reflection coated solid body according to claim 11 wherein the body is selected from the group consisting of optical lenses, eyeglasses, windows and polymer film.

13. An anti-reflection coated solid body wherein the anti-reflection coating comprises at least 2 layers, a first layer in direct contact with the body, said first layer comprising a polymer having a refractive index higher than the refractive index of the body, and a second layer deposited onto said first layer, wherein said second layer is a fluoropolymer according to claim 1 and has a lower refractive index than said solid body.

14. An anti-reflection coated solid body according to claim 13 wherein the fluoropolymer in said second layer is cross-linked.

15. An anti-reflection coated solid body according to claim 14 wherein cross-linking of said fluoropolymer was effected by heat treatment at temperature between about 120°

C. and about 180°

C. for time sufficient to effect cross-linking.

16. An anti-reflection coated solid body according to any one of claims 13, 14 or 15 which is transparent.

17. An anti-reflection coated solid body according to claim 16 wherein the body is selected from the group consisting of optical lenses, eyeglasses, windows and polymer film.

18. An anti-reflection coated solid body according to any one of claims 8, 13 or 14 which is adapted for viewing indicia located on or directly below said reflective surface.

19. An anti-reflection coated solid body according to claim 18 which is selected from the group consisting of flat panel displays, cathode ray tubes, glossy display surfaces or glossy photographic prints.

20. A transferable anti-reflection coated film according to any one of claims 8, 13, 14 or 15 comprising a transparent polymer film, which has the anti-reflection coating deposited on one side, and which is provided with a pressure sensitive adhesive coating on the opposite side.

21. A transferable anti-reflection coated film according to claim 20, further comprising a releasable protective layer in contact with said pressure sensitive adhesive coating.

22. A solid body having applied thereto a transferable anti-reflection coated film according to claim 20.

23. A solid body according to claim 22 which is transparent.

24. A solid body according to claim 22 which is a cathode ray tube or a liquid crystal display.