# US 2021/0278567 A1 · Anti-reflective film, polarizer comprising the same, and image display comprising the anti-reflective film and/or the polarizer comprising the same

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- Number: US 2021/0278567 A1
- Document ID: US20210278567A1
- Status: Published application
- Kind: A1
- Application number: 17/317,975
- Filed: 2021-05-12
- Published: 2021-09-09
- Earliest claimed: 2019-02-01
- Assignees: BenQ Materials Corporation
- Applicants: BenQ Materials Corporation
- Inventors: Ching-Huang Chen; Kuo-Hsuan Yu; Gang-Lun Fan
- Web page: https://patentgrep.com/patent/US20210278567A1

## CPC

- G02B 1/111: using layers comprising organic materials
- C08F 2/48: by ultraviolet or visible light
- C08F 222/1065: {of alcohol terminated (poly)urethanes, e.g. urethane(meth)acrylates}
- C08F 290/067: {Polyurethanes; Polyureas}
- C08F 290/068: {Polysiloxanes}
- C08G 77/14: containing silicon bound to oxygen-containing groups
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C08G 77/24: halogen-containing groups
- C08G 77/46: containing polyether sequences
- C09D 4/06: {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
- C09D 5/002: {Priming paints (C09D5/08 takes precedence)}
- C09D 5/006: {Anti-reflective coatings}
- C09D 7/47: Levelling agents
- C09D 7/67: {Particle size smaller than 100 nm}
- C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres}
- C09D 135/02: Homopolymers or copolymers of esters (C09D135/06, C09D135/08 take precedence)
- C09D 175/14: Polyurethanes having carbon-to-carbon unsaturated bonds
- C09D 175/16: having terminal carbon-to-carbon unsaturated bonds
- C09D 183/06: containing silicon bound to oxygen-containing groups (C09D183/12 takes precedence)
- C09D 183/08: containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
- C09D 183/12: containing polyether sequences
- G02B 1/14: Protective coatings, e.g. hard coatings
- C08K 3/36: Silica
- C08K 2201/011: Nanostructured additives
- G02B 5/3033: {in the form of a thin sheet or foil, e.g. Polaroid}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The invention is to provide an anti-reflective film. The anti-reflective film comprises a substrate, a hard coating layer disposed on the substrate and a low refractive layer disposed on the hard coating layer. The low refractive layer comprises a (meth)acrylate resin, hollow silica nanoparticles, an initiator and a leveling agent. Wherein the leveling agent comprises a (meth)acrylic-modified organosilicone compound having a perfluoropolyether group. The reflectivity of the anti-reflective film of the present invention is in the range of 1.2% to 1.4%.

## Claims

### Claim 1

An anti-reflective film comprising:
a substrate;
a cured hard coating layer coated on the substrate; and
a low refractive layer on the hard coating layer,
wherein the low refractive layer comprises a (meth)acrylate resin, a plurality of hollow silica nanoparticles, an initiator, and a leveling agent comprising a perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound; and
wherein the reflectivity of the anti-reflective film is ranging between 1.2% and 1.4%.

### Claim 2 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound comprises compounds represented by the following formula (I) and represented by the following formula (II):
wherein b′1+b′2 is ranging between 2 and 6.5, and Rf12 is the group represented by the following formula:
wherein n1 is ranging between 2 and 100.

### Claim 3 (depends on 2)

The anti-reflective film as claimed in claim 2, wherein the number average molecular weight (Mn) of the perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound is ranging between 1,500 and 16,000.

### Claim 4 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the amount of the leveling agent used in low refractive layer is ranging from 5 weight parts to 20 weight parts relative to per 100 weight parts of (meth)acrylate resin.

### Claim 5 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the (meth)acrylate resin is selected from at least one of the group consisting of pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth) acrylate, pentaerythritol tetra(meth) acrylate, dipentaerythritol penta(meth)acrylate, trimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate and dipentaerythritol tetra(meth)acrylate, or combinations thereof.

### Claim 6 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the particle diameter of the hollow silica nanoparticles used in the low refractive layer is from 50 nm to 100 nm.

### Claim 7 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the amount of the hollow silica nanoparticles used in the low refractive layer is ranging from 60 weight parts to 130 weight parts relative to per 100 weight parts of (meth)acrylate resin.

### Claim 8 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the amount of the initiator used in the low refractive layer is ranging from 1.5 weight parts to 20 weight parts relative to per 100 weight parts of (meth)acrylate resin.

### Claim 9 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the initiator is selected from at least one of the group consisting of hydroxycyclohexyl phenyl ketone, diphenyl(2,4,6-trimethylbenzyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl propanone] and 2-hydroxy-1-[4-[4-(2-hydroxy-2-methylpropanoyl)phenoxy]phenyl]-2-methylpropan-1-one, or combinations thereof.

### Claim 10 (depends on 1)

The anti-reflective film as claimed in claim 1, wherein the cured hard coating layer is formed by curing a curable composition comprising a urethane(meth)acrylate oligomer and an initiator.

### Claim 11 (depends on 10)

The anti-reflective film as claimed in claim 10, wherein the number molecular weight of the urethane(meth)acrylate oligomer is greater than 1,800.

### Claim 12 (depends on 10)

The anti-reflective film as claimed in claim 10, wherein the viscosity of the urethane(meth)acrylate oligomer at 25° C. is greater than 45,000 cps.

### Claim 13

A polarizer comprising a polarizing element, wherein the polarizer comprises an anti-reflective film formed thereon, and the anti-reflective film comprises:
a substrate;
a cured hard coating layer coated on the substrate; and
a low refractive layer on the hard coating layer,
wherein the low refractive layer comprises a (meth)acrylate resin, a plurality of hollow silica nanoparticles, an initiator, and a leveling agent comprising a perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound; and
wherein the reflectivity of the anti-reflective film is ranging between 1.2% and 1.4%.

### Claim 14

A display comprising an anti-reflective film, wherein the anti-reflective film comprises:
a substrate;
a cured hard coating layer coated on the substrate; and
a low refractive layer on the hard coating layer,
wherein the low refractive layer comprises a (meth)acrylate resin, a plurality of hollow silica nanoparticles, an initiator, and a leveling agent comprising a perfluoropolyether group-containing (meth)acrylic-modified organosilicone compound; and
wherein the reflectivity of the anti-reflective film is ranging between 1.2% and 1.4%.