Photocurable resin composition, image display device and method for manufacturing image display device

Patent metadata

Field	Value
Publication number	US-2016237281-A1
Application number	US-201415025621-A
Country	US
Kind code	A1
Filing date	Sep 26, 2014
Priority date	Sep 30, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

The present invention relates to a photocurable resin composition including (A) a compound having (meth)acryloyl group, (B) a photopolymerization initiator, and (C) a plasticizer, a content of the photopolymerization initiator (B) being 4.0 to 10% by mass.

First claim

1 . A photocurable resin composition comprising (A) a compound having a (meth)acryloyl group, (B) a photopolymerization initiator, and (C) a plasticizer, a content of the photopolymerization initiator (B) being 4.0 to 10% by mass.

2 . The photocurable resin composition according to claim 1 , wherein an isoprene polymer having a (meth)acryloyl group is contained as the compound (A) having a (meth)acryloyl group.

3 . The photocurable resin composition according to claim 1 , wherein a content of the compound (A) having a (meth)acryloyl group is 10 to 90% by mass relative to a total amount of the photocurable resin composition.

4 . The photocurable resin composition according to claim 1 , wherein (A1) a polymer having a (meth)acryloyl group in a molecule thereof and (A2) a monomer having one (meth)acryloyl group in a molecule thereof are contained as the compound (A) having a (meth)acryloyl group.

5 . The photocurable resin composition according to claim 4 , wherein the monomer (A2) having one (meth)acryloyl group in a molecule thereof contains at least one (meth)acrylate having a dicyclopentanyl group, a dicyclopentenyl group, or an isobornyl group, and a content of the monomer (A2) having one (meth)acryloyl group in a molecule thereof is 10 to 40% by mass relative to a total amount of the photocurable resin composition.

6 . The photocurable resin composition according to claim 1 , further comprising (D) an antioxidant.

7 . The photocurable resin composition according to claim 6 , wherein the antioxidant (D) contains (D1) a compound having a hindered phenol structure and (D2) a compound having a thioether structure.

8 . The photocurable resin composition according to claim 1 , which has a viscosity at 25° C. of 5.0×10 2 mPa·s to 5.0×10 4 mPa·s.

9 . A method for manufacturing an image display device including an image display member and a light-transmitting cover member having a light-shielding layer formed on the periphery thereof, the image display member and the light-transmitting cover member being laminated via a light-transmitting cured resin layer formed of the photocurable resin composition according to claim 1 such that a light-shielding layer forming surface of the light-transmitting cover member is disposed on the side of the image display member, the method comprising the following steps (I) to (III), and in the step (II), the photocurable resin composition being cured upon irradiation with an active energy ray such that a curing rate of the light-transmitting cured resin layer is 80% or more,
Step (I): a step of subjecting the photocurable resin composition to layer formation on a surface of the light-transmitting cover member on the light-shielding layer forming side thereof, or a surface of the image display member on the light-shielding layer side thereof, to form a photocurable resin composition layer,
Step (II): a step of curing the formed photocurable resin composition layer upon irradiation with an active energy ray to form a light-transmitting cured resin layer, and
Step (III): a step of sticking the image display member and the light-transmitting cover member to each other so as to interpose the light-shielding layer and the light-transmitting cured resin layer between the image display member and the light-transmitting cover member.

10 . The method for manufacturing an image display device according to claim 9 , wherein in the step (I), the photocurable resin composition layer is formed on a surface of the light-transmitting cover member on the light-shielding layer forming side.

11 . The method for manufacturing an image display device according to claim 9 , wherein in the step (I), the photocurable resin composition layer is formed on a surface of the image display member.

12 . The method for manufacturing an image display device according to claim 11 , wherein in the step (III), the image display member having a light-transmitting cured resin layer formed thereon and the light-transmitting cover member having a light-shielding layer formed thereon are embedded in gaps formed between the image display member and the light-shielding layer and between the image display member and the light-transmitting cover member.

13 . The method for manufacturing an image display device according to claim 9 , wherein in the step (I), the photocurable resin composition layer is formed in a thickness of 6 μm to 1.5×10 3 μm on a surface of the image display member or the light-transmitting cover member.

14 . The method for manufacturing an image display device according to claim 9 , wherein the image display member is a liquid crystal display panel, an organic EL display panel, a plasma display panel, a touch panel, or a parallax barrier panel.

15 . An image display device comprising a cured product of the photocurable resin composition according to claim 1 .

Assignees

• Hitachi Chemical Co Ltd

Inventors

• Miyamoto Yuuki
• Kimura Youichi
• Okazaki Tetsuya
• SHINDOU Hiroka
• Wada Masayuki
• Horinouchi Tomohiro

Classifications

• C09D7/125

  Chemistry & Metallurgy · mapped topic

• C09D4/00 Primary

  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

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09D7/1241

  Chemistry & Metallurgy · mapped topic

• C08F2/50

  with sensitising agents · CPC title