# US 12,759,273 B2 · Hardcoat film and article and image display device having hardcoat film

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,759,273 B2
- Document ID: US12759273B2
- Status: Granted
- Kind: B2
- Application number: 17/038,890
- Filed: 2020-09-30
- Published: 2021-01-28
- Granted: 2026-10-13
- Earliest claimed: 2018-04-26
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Yuta Fukushima; Ayako Matsumoto; Tetsu Kitamura; Akio Tamura; Keigo Ueki
- Web page: https://patentgrep.com/patent/US12759273B2

## CPC

- B32B 27/08: of synthetic resin
- B32B 27/283: {comprising polysiloxanes}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/38: comprising epoxy resins
- G02B 1/14: Protective coatings, e.g. hard coatings
- B32B 2250/02: 2 layers
- B32B 2250/24: All layers being polymeric
- B32B 2307/536: Hardness
- B32B 2307/584: Scratch resistance
- B32B 2551/00: Optical elements
- B32B 2571/00: Protective equipment
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A hardcoat film has a substrate, a hardcoat layer, and a mixed layer in this order. The hardcoat layer contains a cured product of polyorganosilsesquioxane (a1) having an epoxy group. The mixed layer contains a cured product of a compound (b1) having an epoxy group and a cured product of a compound (b2) having two or more (meth)acryloyl groups in one molecule.

## Claims

### Claim 1

A hardcoat film comprising:
a substrate;
a hardcoat layer;
a mixed layer; and
an anti-scratch layer in this order,
wherein:
the hardcoat layer contains a cured product of polyorganosilsesquioxane (a1) having an epoxy group,
the mixed layer contains a cured product of a compound (b1) having an epoxy group and a cured product of a compound (b2) having two or more (meth)acryloyl groups in one molecule,
the anti-scratch layer contains a cured product of a compound (c1) having two or more (meth)acryloyl groups in one molecule,
the polyorganosilsesquioxane (a1) having an epoxy group and the compound (b1) having an epoxy group are the same compound,
the compound (b2) having two or more (meth)acryloyl groups in one molecule and the compound (c1) having two or more (meth)acryloyl groups in one molecule are a same compound prior to fully curing of the hardcoat film, and
the hardcoat layer and the mixed layer are bonded to each other by a covalent bond.

### Claim 2 (depends on 1)

The hardcoat film according to claim 1,
wherein a thickness of the mixed layer is 0.05 μm to 10 μm.

### Claim 3 (depends on 1)

The hardcoat film according to claim 1,
wherein a total thickness of the mixed layer and the anti-scratch layer is 0.1 μm to 10 μm.

### Claim 4 (depends on 1)

The hardcoat film according to claim 1,
wherein in the mixed layer, a content rate of the cured product of the compound (b2) having two or more (meth)acryloyl groups in one molecule is equal to or higher than 10% by mass with respect to a total amount of the cured product of the compound (b1) having an epoxy group and the cured product of the compound (b2) having two or more (meth)acryloyl groups in one molecule.

### Claim 5 (depends on 1)

The hardcoat film according to claim 1,
wherein the hardcoat layer does not contain a cured product of a compound having a (meth)acryloyl group, or a content rate of the cured product of a compound having a (meth)acryloyl group is less than 10% by mass with respect to a total amount of the cured product of the polyorganosilsesquioxane (a1) having an epoxy group and the cured product of the compound having a (meth)acryloyl group.

### Claim 6 (depends on 1)

The hardcoat film according to claim 1,
wherein the substrate contains an imide-based polymer.

### Claim 7 (depends on 1)

An article comprising:
the hardcoat film according to claim 1.

### Claim 8 (depends on 1)

An image display device comprising:
the hardcoat film according to claim 1 as a surface protection film.

### Claim 9 (depends on 1)

The hardcoat film according to claim 1, wherein the epoxy group of the polyorganosilsesquioxane (a1) in the hardcoat layer and the epoxy group of the epoxy compound (b1) in the mixed layer form a covalent bond at an interface between the hardcoat layer and the mixed layer.

### Claim 10 (depends on 1)

The hardcoat film according to claim 1, wherein the mixed layer is bonded to both the hardcoat layer and the anti-scratch layer with covalent bonds.

### Claim 11 (depends on 1)

The hardcoat film according to claim 1, wherein the cured product of (b1) and the cured product of (b2) are interlaced with each other in the hardcoat film.

### Claim 12 (depends on 1)

The hardcoat film according to claim 1, wherein the mixed layer comprises an infiltration of the anti-scratch layer into the hardcoat layer prior to fully curing the hardcoat film, such that the polyorganosilsesquioxane (a1) having an epoxy group and the compound (b1) having an epoxy group are a same compound prior to fully curing of the hardcoat film.