Composite film with anti-reflective coating

Patent metadata

Field	Value
Publication number	US-11840642-B2
Application number	US-202318157959-A
Country	US
Kind code	B2
Filing date	Jan 23, 2023
Priority date	Jun 20, 2018
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A composite film may include a first transparent substrate and a first anti-reflective coating overlying a first surface of the first transparent substrate. The first anti-reflective coating may include a first UV curable acrylate binder, a photo initiator component, and silica nanoparticles dispersed within the first anti-reflective coating. The first anti-reflective coating may further include a ratio AC1SiO2/AC1B of at least about 0.01 and not greater than about 1.3. The composite film may further have a VLT of at least about 93.0% and a haze value of not greater than about 3%.

First claim

What is claimed is:

1. A composite film comprising:
a first transparent substrate; and
a first anti-reflective coating overlying a first surface of the first transparent substrate, wherein the first anti-reflective coating comprises:
a first UV curable acrylate binder at a concentration of at least about 40 wt. % and not greater than about 95 wt. % for a total weight of the first anti-reflective coating,
a photo initiator component at a concentration of at least about 2.0 wt. % and not greater than about 10 wt. % for a total weight of the first anti-reflective coating, and
silica nanoparticles dispersed within the first anti-reflective coating at a concentration of at least about 5 wt. % and not greater than about 60 wt. % for a total weight of the first anti-reflective coating, wherein the composite film has a VLT of at least about 93.0%, and wherein the composite film has a haze value of not greater than about 3%.

2. The composite film of claim 1 , wherein the first anti-reflective coating has a thickness of at least about 50 nm and not greater than about 500 nm.

3. The anti-reflective coating of claim 1 , wherein the silica nanoparticles in the first anti-reflective coating are surface treated silica nanoparticles.

4. The anti-reflective coating of claim 3 , wherein the silica nanoparticles in the first anti-reflective coating are surface treated with polysiloxane, acrylate or a combination thereof.

5. The composite film of claim 1 , wherein the silica nanoparticles in the first anti-reflective coating are solid silica nanoparticles.

6. The composite film of claim 1 , wherein the silica nanoparticles in the first anti-reflective coating have an average particle size (D50) of at least about 1 nm and not greater than about 500 nm.

7. The composite film of claim 1 , wherein the first anti-reflective coating comprises a second UV curable acrylate binder.

8. The composite film of claim 7 , wherein the first anti-reflective coating comprises the second UV curable acrylate binder at a concentration of at least about 5.0 wt. % and not greater than about 60 wt. % for a total weight of the first anti-reflective coating.

9. The composite film of claim 1 , wherein the first anti-reflective coating comprises a wetting agent at a concentration of at least about 0.01 wt. % for a total weight of the first anti-reflective coating.

10. The composite film of claim 9 , wherein the first anti-reflective coating comprises the wetting agent at a concentration of not greater than about 0.3 wt. % for a total weight of the first anti-reflective coating.

11. The composite film of claim 1 , wherein the first anti-reflective coating comprises a surface energy modifier at a concentration of at least about 0.01 wt. % for a total weight of the first anti-reflective coating.

12. The composite film of claim 11 , wherein the first anti-reflective coating comprises the surface energy modifier at a concentration of not greater than about 0.3 wt. % for a total weight of the first anti-reflective coating.

13. The composite film of claim 1 , wherein the first anti-reflective coating comprises a second UV curable acrylate binder.

14. The composite film of claim 13 , wherein the second UV curable acrylate binder comprises SR351LV, SR355, SR399, tetrafunctional acrylate monomer, pentafunctional acrylate monomers, pentaerythritol Tri-Tetraacrylate (PETIA), Ebecry 140, Ebecryl 180, multifunctional oligomers, or UV resins.

15. The composite film of claim 13 , wherein the first anti-reflective coating comprises the second UV curable acrylate binder at a concentration of at least about 5.0 wt. % for a total weight of the first anti-reflective coating.

16. The composite film of claim 15 , wherein the first anti-reflective coating comprises the second UV curable acrylate binder at a concentration of not greater than about 60 wt. % for a total weight of the first anti-reflective coating.

17. The composite film of claim 1 , wherein the first transparent substrate comprises a PET film.

18. The composite film of claim 17 , wherein the first transparent substrate comprises an optically clear PET film.

19. The composite film of claim 17 , wherein the first transparent substrate comprises a single layer optically clear PET film.

20. The composite film of claim 19 , wherein PET film comprises a thickness of at least about 5 mil.

Assignees

• Saint Gobain Performance Plastics Corp

Inventors

• Wang Yongzhong
• Moerkerke Robrecht
• Lienhart Fabien

Classifications

• C09D5/006 Primary

  Anti-reflective coatings · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B27/36 Primary

  comprising polyesters · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title