Composite film with anti-reflective coating

Patent metadata

Field	Value
Publication number	US-11584856-B2
Application number	US-201916441161-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jun 20, 2018
Publication date	Feb 21, 2023
Grant date	Feb 21, 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 AC1 SiO2 /AC1 B 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 85 wt. % for a total weight of the first anti-reflective coating,
a photo initiator component at a concentration of at least about 2 wt. % and not greater than about 7.5 wt. % for a total weight of the first anti-reflective coating,
silica nanoparticles dispersed within the first anti-reflective coating at a concentration of at least about 15 wt. % and not greater than about 60 wt. % for a total weight of the first anti-reflective coating, and
a ratio AC1 SiO2 /AC1 B of at least about 0.1 and not greater than about 1.3, where AC1 SiO2 is the concentration of the silica nanoparticles in the first anti-reflective coating in weight percent for a total weight of the first anti-reflective coating and AC1 B is the concentration of the first UV curable acrylate binder in the first anti-reflective coating in weight percent 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.

Assignees

• Saint Gobain Performance Plastics Corp

Inventors

• Wang Yongzhong
• Moerkerke Robrecht
• Lienhart Fabien

Classifications

• B32B2307/416

  Reflective · CPC title

• B32B2307/732

  Dimensional properties · CPC title

• C09D5/006 Primary

  Anti-reflective coatings · CPC title

• C08K3/36

  Silica · CPC title

• C09D135/02

  Homopolymers or copolymers of esters (C09D135/06, C09D135/08 take precedence) · CPC title