Sheet-shaped photocurable composition, photocurable composition solution, method for producing sheet-shaped photocurable composition, and laminated body

Patent metadata

Field	Value
Publication number	US-12344689-B2
Application number	US-202117539783-A
Country	US
Kind code	B2
Filing date	Dec 1, 2021
Priority date	Dec 11, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

The sheet-shaped photocurable composition of the present invention includes components (A) to (D) as follows, and is in a sheet shape at 25° C. in a state before curing:
Component (A): (meth)acrylic triblock copolymer, Component (B): (meth)acrylate oligomer (excluding the component (A)), Component (C): a monomer having a (meth)acryloyl group and having a specific structure, and Component (D): photoinitiator.

First claim

What is claimed is:

1. A sheet-shaped photocurable composition comprising components (A) to (D) as follows and being in a sheet shape at 25° C. in a state before curing:
Component (A): (meth)acrylic triblock copolymer,
Component (B): (meth)acrylate oligomer (excluding the component (A)),
Component (C): at least one compound selected from the group consisting of hydroxyethyl (meth) acrylamide and N-n-butoxymethyl (meth) acrylamide, and
Component (D): photoinitiator,
wherein a content of the component (B) is 42.9 to 66.7 parts by mass relative to 100 parts by mass of the component (A),
a content of the component (C) is 4.3 to 7.1 parts by mass relative to 100 parts by mass of the component (A),
the component (A) is an elastomer including no reactive functional group and is a triblock copolymer of (meth)acrylate of an X—Y—X type composed of a segment X and a segment Y, in which the segment X is a polymethyl methacrylate block and the segment Y is a poly-n-butyl acrylate block, and
the component (B) is an aliphatic urethane-modified diacrylate oligomer which has a weight average molecular weight of 4,000 to 30,000.

2. The sheet-shaped photocurable composition according to claim 1 , further comprising a coupling agent as a component (E).

3. The sheet-shaped photocurable composition according to claim 1 , wherein a cured product of the sheet-shaped photocurable composition has a peel adhesion strength at 25° C. of 1.0 kN/m or more and a peel adhesion strength at 85° C. of 0.3 kN/m or more.

4. The sheet-shaped photocurable composition according to claim 1 , wherein a content of the component (A) is 40 to 90 parts by mass relative to 100 parts by mass of a total of the components (A) to (D).

5. A laminated body, comprising a configuration in which a first adherend, a sheet-shaped photocurable composition, and a second adherend are bonded in this order, wherein
the sheet-shaped photocurable composition is formed by volatilizing a solvent included in a photocurable composition solution on the first adherend and/or the second adherend,
the photocurable composition solution comprises components (A) to (D) as follows and the solvent:
Component (A): (meth) acrylic triblock copolymer,
Component (B): (meth)acrylate oligomer (excluding the component (A)),
Component (C): at least one compound selected from the group consisting of hydroxyethyl (meth) acrylamide and N-n-butoxymethyl (meth) acrylamide, and
Component (D): photoinitiator,

a content of the component (B) is 42.9 to 66.7 parts by mass relative to 100 parts by mass of the component (A),
a content of the component (C) is 4.3 to 7.1 parts by mass relative to 100 parts by mass of the component (A),
the component (A) is an elastomer including no reactive functional group, and is a triblock copolymer of (meth)acrylate of an X—Y—X type composed of a segment X and a segment Y, in which the segment X is a polymethyl methacrylate block and the segment Y is a poly-n-butyl acrylate block, and
the component (B) is an aliphatic urethane-modified diacrylate oligomer which has a weight average molecular weight of 4,000 to 30,000.

Assignees

• Three Bond Co Ltd

Inventors

• Ueno Kazuyuki
• Nemoto Takashi

Classifications

• C09J7/40

  characterised by release liners · CPC title

• C08J2351/00

  Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers · CPC title

• C08J2353/00

  Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers · CPC title

• C09J7/10 Primary

  without carriers · CPC title

• C09J2451/00

  Presence of graft polymer · CPC title