Fluoropolymer coating compositions with olefinic silanes for anti-reflective polymer films

• US 20060147177A1
• Filed: 12/30/2004
• Published: 07/06/2006
• Est. Priority Date: 12/30/2004
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Tatge, Timothy J., Klun, Thomas P., Schultz, William J., Jing, Naiyong, Qiu, Zai-Ming, Fukushi, Tatsuo, Cao, Chuntao, Coggio, William D., Walker, Christopher B. Jr.
• Application Number:
  US11/026,752
• Publication Number:
  US 20060147177A1
• Time in Patent Office: Days
• US Class Current: 385/147
• CPC Class Codes: C08F 14/18 Monomers containing fluorine
• CPC Class Codes: C08F 2/00 Processes of polymerisation
• CPC Class Codes: C08F 2/44 Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• CPC Class Codes: C08F 259/08 on to polymers containing fluorine
• CPC Class Codes: C08F 292/00 Macromolecular compounds obtained by polymerising monomers on to inorganic materials
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/5425 containing at least one C=C bond
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08K 9/08 Ingredients agglomerated by treatment with a binding agent
• CPC Class Codes: C08L 27/12 containing fluorine atoms
• CPC Class Codes: C09D 151/10 grafted on to inorganic materials
• CPC Class Codes: C09D 7/62 modified by treatment with other compounds
• CPC Class Codes: G02B 1/111 using layers comprising organic materials
• 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 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

An economic, optically transmissive, stain and ink repellent, durable low refractive index fluoropolymer composition for use in an antireflection film or coupled to an optical display. In one aspect of the invention, the composition is formed from the reaction product of a fluoropolymer, a C═C double bond group containing silane ester agent, and an optional multi-olefinic crosslinker. In another aspect of the invention, the composition further includes surface modified inorganic nanoparticles. In another aspect, the multi-olefinic crosslinker is an alkoxysilyl-containing multi-olefinic crosslinker.

Claims

1. A low refractive index composition for use in an antireflection coating for an optical display, the composition comprising the reaction product of:

a fluoropolymer;

a C═

C double bond containing silane ester agent;

a plurality of surface modified nanoparticles; and

optionally a multi-olefinic crosslinker.

2. The composition of claim 1, wherein said multi-olefinic crosslinker comprises a multi-acrylate crosslinker.

3. The composition of claim 1, wherein said fluoropolymer is selected from the group consisting of a VDF containing homopolymer, a VDF copolymer, a TFE copolymer, a HFP copolymer, THV, and FKM.

4. The composition of claim 1, wherein said fluoropolymer comprises a fluoroelastomer.

5. The composition of claim 4, said fluoroelastomer is selected from the group consisting of a Cl-containing fluoroelastomer, Br-containing fluoroelastomer, an I-containing fluoroelastomer, and a CN-containing fluoroelastomer.

6. The composition of claim 2, wherein said multi-acrylate crosslinker comprises a fluorinated multi-acrylate crosslinker.

7. The composition of claim 6, wherein said fluorinated multi-acrylate crosslinker comprises a perfluoropolyether multi-acrylate crosslinker.

8. The composition of claim 7, wherein said perfluoropolyether multi-acrylate crosslinker comprises an HFPO-multiacrylate crosslinker.

9. The composition of claim 2, wherein said multi-acrylate crosslinker is selected from the group consisting of PETA and TMPTA.

10. The composition of claim 2, wherein said multi-olefinic crosslinker further comprises a mono-acrylate.

11. The composition of claim 10, wherein said mono-acrylate comprises a fluorinated mono-acrylate.

12. The composition of claim 11, wherein said fluorinated mono-acrylate comprises a perfluoropolyether mono-acrylate.

13. The composition of claim 12, wherein said perfluoropolyether mono-acrylate comprises an RFPO-monoacrylate.

14. The composition of claim 1, wherein said a C═

C double bond containing silane ester agent comprises a vinyl silane ester compound.

15. The composition of claim 1, wherein said C═

C double bond containing silane ester compound comprises 3-(trimethoxysilyl) propyl methacrylate.

16. The composition of claim 14, wherein said vinyl silane ester compound comprises vinyltrimethoxy silane.

17. The composition of claim 14, wherein said C═

C double bond containing silane ester agent are polymeric oligomers.

18. The composition of claim 1, wherein said multi-olefinic crosslinker comprises an alkoxysilyl-containing multi-olefinic crosslinker

19. An antireflection film having a layer of said low refractive index material of claim 1, said antireflection film further comprising a high refractive index layer coupled to said layer of said low refractive index material.

20. An optical device comprising a layer of said low refractive index material formed according to claim 1.

21. A low refractive index composition for use in an antireflection coating for an optical display, the composition comprising the reaction product of:

a fluoropolymer; and

an alkoxysilyl-containing multi-olefinic crosslinker.

22. The composition of claim 21 further comprising a plurality of surface modified inorganic particles.

23. An antireflection film having a layer of said low refractive index material of claim 21, said antireflection film further comprising a high refractive index layer coupled to said layer of said low refractive index material.

24. An optical device comprising a layer of said low refractive index material formed according to claim 21.

25. A method for forming an optically transmissive, stain and ink repellent, durable optical display comprising:

providing an optical display having an optical substrate;

forming a low refractive index polymer composition comprising a fluoropolymer, a C═

C double bond containing silane ester agent, and an alkoxysilyl-containing multi-olefinic crosslinker;

applying a layer of said low refractive index polymer composition to said optical substrate; and

curing said layer to form a cured film.

26. The method of claim 25, wherein providing an optical display comprises providing an optical display having a hard coat layer applied to an optical substrate

27. The method of claim 25, wherein forming a low refractive index polymer composition comprises:

reactively coupling a fluoropolymer and a C═

C double bond containing silane ester agent to form an silyl functional fluoropolymer; and

introducing a alkoxysilyl-containing multi-olefinic crosslinker to said silyl functional fluoropolymer.