Photocurable resin composition and production method of image display device

Patent metadata

Field	Value
Publication number	US-10025184-B2
Application number	US-201414892115-A
Country	US
Kind code	B2
Filing date	May 21, 2014
Priority date	Jun 6, 2013
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A liquid photocurable resin composition contains a (meth)acrylate oligomer component, an alkyl (meth)acrylate monomer component, and a photopolymerization initiator component. The (meth)acrylate oligomer component contains at least one oligomer selected from the group consisting of a polyurethane (meth)acrylate oligomer, a polyisoprene (meth)acrylate oligomer, a polybutadiene (meth)acrylate oligomer, and a polyether (meth)acrylate oligomer that have a weight average molecular weight of 1,000 to 200,000. The photopolymerization initiator contains a molecule cleavage-type photoradical polymerization initiator and a hydrogen-abstracting photoradical polymerization initiator at a ratio by mass of 10:1 to 10:35. The cured resin that is obtained by photoradical polymerization of the photocurable resin composition has a glass transition temperature of −40 to 20° C. when the composition is cured at a curing ratio of the outermost surface of more than 90%.

First claim

The invention claimed is:

1. A liquid photocurable resin composition comprising the following components (A) to (C):
Component (A) a (meth)acrylate oligomer component;
Component (B) an alkyl (meth)acrylate monomer component; and
Component (C) a photopolymerization initiator component, wherein
the (meth)acrylate oligomer component as the component (A) contains at least one oligomer selected from the group consisting of a polyurethane (meth)acrylate oligomer, a polyisoprene (meth)acrylate oligomer, a polybutadiene (meth)acrylate oligomer, and a polyether (meth)acrylate oligomer that have a weight average molecular weight of 1,000 to 200,000,
the photopolymerization initiator as the component (C) contains a molecule cleavage-type photoradical polymerization initiator and a hydrogen-abstracting photoradical polymerization initiator at a ratio by mass of 10:1 to 10:35, and
a cured resin that is obtained by photoradical polymerization by irradiation of the photocurable resin composition with ultraviolet rays in the air has a glass transition temperature of −40 to 20° C. when it is cured at a curing ratio of the outermost surface of more than 90%.

2. The photocurable resin composition according to claim 1 , further comprising the following component (D):
Component (D) a plasticizer component.

3. The photocurable resin composition according to claim 2 , being a liquid photocurable resin composition used to form a cured resin layer of an image display device in which an image display member and a light-transmitting cover member having a light-shielding layer formed in a peripheral portion thereof are layered through a light-transmitting cured resin layer formed from the liquid photocurable resin composition so that a light-shielding layer-forming face of the light-transmitting cover member is disposed on the image display member side.

4. The photocurable resin composition according to claim 1 , being a liquid photocurable resin composition used to form a cured resin layer of an image display device in which an image display member and a light-transmitting cover member having a light-shielding layer formed in a peripheral portion thereof are layered through a light-transmitting cured resin layer formed from the liquid photocurable resin composition so that a light-shielding layer-forming face of the light-transmitting cover member is disposed on the image display member side.

5. A method of producing an image display device in which an image display member and a light-transmitting cover member having a light-shielding layer formed in a peripheral portion thereof are layered through a light-transmitting cured resin layer formed from a liquid photocurable resin composition so that a light-shielding layer-forming face of the light-transmitting cover member is disposed on the image display member side, the method comprising the following steps (a) to (c):
<Step (a)>
applying the liquid photocurable resin composition according to claim 1 to a surface of the light-transmitting cover member on the light-shielding layer-forming side or a surface of the image display member at a thickness that is more than a thickness of the light-shielding layer so as to cancel a step formed between the light-shielding layer and the surface of the light-transmitting cover member on the light-shielding layer-forming side;

<Step (b)>
irradiating the applied photocurable resin composition with ultraviolet rays to form a cured resin layer; and

<Step (c)>
bonding the light-transmitting cover member and the image display member so that the light-shielding layer and the cured resin layer are inside, to obtain an image display device.

Assignees

• Dexerials Corp

Inventors

• Iwata Mizuki
• Uematsu Takeshi
• Kawabata Kazuhito
• Hayashi Naoki

Classifications

• G03F7/0005

  Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor · CPC title

• C08F290/062

  Polyethers · CPC title

• G03F7/2002

  with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image · CPC title

• C08F290/067

  Polyurethanes; Polyureas · CPC title

• G03F7/028 Primary

  with photosensitivity-increasing substances, e.g. photoinitiators · CPC title