Article comprising fluorochemical surface layer

1. An article comprising:

a) a light transmissive substrate having a surface layer comprising the reaction product of

i) at least one fluoropolyether (meth)acryl compound that comprises at least one terminal F(CF(CF 3 )CF 2 O)aCF(CF 3 )— group and at least two (meth)acryl groups; wherein a averages from 4 to 15; and

ii) at least one non-fluorinated crosslinking agent; and

b) a hardcoat layer disposed between the substrate and the surface layer.

2. The article of claim 1 wherein the substrate is a transparent or matte polymeric film.

3. The article of claim 1 wherein the surface layer exhibits a static contact angle with water of at least 90°.

4. The article of claim 1 wherein the surface layer exhibits an advancing contact angle with hexadecane of at least 50°.

5. The article of claim 1 wherein the surface layer exhibits ink repellency after 200 wipes with cheesecloth and a weight of 725 grams according to the Durability Test.

6. The article of claim 1 wherein the surface layer exhibits ink bead up after 200 wipes with cheesecloth and a weight of 725 grams according to the Durability Test.

7. The article of claim 1 wherein the surface layer has a thickness ranging from about 10 to 200 nanometers.

8. The article of claim 7 wherein the surface layer exhibits an initial haze of less than 2%.

9. The article of claim 7 wherein the surface layer exhibits an initial transmission of at least 90% as measured with a BYK Gardner-Haze-Clarity-Transmission meter.

10. The article of claim 1 wherein the substrate has a major surface opposing the surface layer and an adhesive layer is disposed on the opposing major surface.

11. The article of claim 10 wherein the adhesive layer is selected from a permanent adhesive composition or a removable adhesive composition.

12. The article of claim 1 wherein the reaction product further comprises at least one monofunctional compound.

13. The article of claim 12 wherein the monofunctional compound has the formula (R A )—W—(CH 2 R F1 —H) wherein R A is a (meth)acrylate group or a CH 2 ═CFCO group, R F1 is a fluoroalkylene group comprising 2 to 7 carbon atoms, and W is a linking group.

14. The article of claim 13 wherein the compound of the formula (R A )—W—(CH 2 R F1 —H) is ω-hydro 2,2,3,3,4,4,5,5-octafluoropentyl acrylate.

15. The article of claim 1 wherein the reaction product further comprises a Michael-type addition of a reactive fluoropolyether and a poly(meth)acrylate.

16. The article of claim 1 wherein the crosslinking agent is selected from the group consisting of trimethyloipropane triacrylate, pentaerythritol triacrylate, dipentaerythritol pentaacrylate, pentaerythritol tetraacrylate, and mixtures thereof.

17. A method of providing a surface layer on a substrate comprising:

a) providing a hardcoated substrate;

b) coating the fluoropolyether (meth)acryl compound and non-fluorinated crosslinking agent of claim 1 onto the hardcoated substrate; and

c) curing the composition.

18. A display panel comprising:

a) a light transmissive substrate having a surface layer comprising the reaction product of

i) at least one fluoropolyether (meth)acryl compound that comprises at least one terminal F(CF(CF 3 )CF 2 O)aCF(CF 3 )— group and at least two (meth)acryl groups; wherein a averages from 4 to 15;, and

ii) at least one non-fluorinated crosslinking agent; and

b) a hardcoat layer disposed between the substrate and the surface layer.

19. The display panel of claim 18 wherein the article is selected from a touch screen, a liquid crystal display panel, a plasma display panel, a television screen, a computer screen, and an instrument display panel.

20. An article comprising a substrate having a surface layer comprising the reaction product of at least one fluoropolyether (meth)acryl compound that comprises at least one terminal F(CF(CF 3 )CF 2 O)aCF(CF 3 )— group and at least two (meth)acryl groups, wherein a averages from 4 to 15, and at least one non-fluorinated crosslinking agent; and a hardcoat layer disposed between the substrate and the surface layer.