Photocurable resin composition and method of manufacturing image display device using the same
AssigneeDexerials Corporation
InventorsNaoki Hayashi, Tsukasa Nakamura
Life of this patent
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Abstract
A photocurable resin composition contains an acrylate-based oligomer component as component (a), an acrylic-based monomer component as component (b), a plasticizer component as component (c), and a photopolymerization initiator component as component (d). The total amount of the component (a) and the component (b) contained in the photocurable resin composition is 25 to 80% by mass, and the amount of the plasticizer component as the component (c) contained in the photocurable resin composition is 65 to 10% by mass. The component (c) contains a solid tackifier and a liquid plasticizing component, and the mass ratio of the tackifier to the liquid plasticizing component is in the range of 60 to 30 : 30 to 10.
Claims8
A method of manufacturing an image display device including an image display member and a light-transmitting cover member that are stacked through a light-transmitting cured resin layer formed from a photocurable resin composition in a liquid form, the method comprising the following steps (A) to (C):
- <Step (A)>
- a step of applying the photocurable resin composition in a liquid form to a surface of the light-transmitting cover member or a surface of the image display member;
- <Step (B)>
- a step of irradiating the applied photocurable resin composition with ultraviolet rays to form a cured resin layer having a degree of curing 90% or higher;
- and
- <Step (C)>
- a step of laminating the light-transmitting cover member to the image display member such that the cured resin layer is disposed inward to thereby obtain the image display device, wherein
- the photocurable resin composition contains the following components (a) to (d):
- <component (a)>an acrylate-based oligomer component selected from the group consisting of a polyisoprene-based (meth)acrylate oligomer, a polybutadiene-based (meth)acrylate oligomer, and a polyurethane-based (meth)acrylate oligomer;
- <component (b)>an acrylic-based monomer component;
- <component (c)>a plasticizer component;
- and
- <component (d)>a photoradical polymerization initiator component;
- wherein
- a total amount of the component (a) and the component (b) contained in the photocurable resin composition is 25 to 80% by mass, an amount of the component (c) contained in the photocurable resin composition is 30 to 60% by mass, the component (c) contains a solid tackifier having a softening point of 60 to 150° C. and a liquid plasticizing component as well as contains a tackifier and a liquid plasticizing component, and a mass ratio of the tackifier to the liquid plasticizing component is in a range of 60 to 30:30 to 10.
A method of manufacturing an image display device including an image display member and a light-transmitting cover member that are stacked through a light-transmitting cured resin layer formed from a photocurable resin composition in a liquid form, the method comprising the following steps (A) to (D):
- <Step (A)>
- a step of applying the photocurable resin composition in a liquid form to a surface of the light-transmitting cover member or a surface of the image display member;
- <Step (B)>
- a step of irradiating the applied photocurable resin composition with ultraviolet rays to pre-cure the applied photocurable resin composition, whereby a pre-cured resin layer is formed;
- <Step (C)>
- a step of laminating the light-transmitting cover member to the image display member such that the pre-cured resin layer is disposed inward;
- and
- <Step (D)>
- a step of irradiating the pre-cured resin layer held between the image display member and the light-transmitting cover member with ultraviolet rays to completely cure the pre-cured resin layer, whereby the image display device is obtained in which the image display member and the light-transmitting cover member are stacked through the light-transmitting cured resin layer;
- wherein
- the photocurable resin composition contains the following components (a) to (d):
- <component (a)>an acrylate-based oligomer component selected from the group consisting of a polyisoprene-based (meth)acrylate oligomer, a polybutadiene-based (meth)acrylate oligomer, and a polyurethane-based (meth)acrylate oligomer;
- <component (b)>an acrylic-based monomer component;
- <component (c)>a plasticizer component;
- and
- <component (d)>a photoradieal polymerization initiator component;
- wherein
- a total amount of the component (a) and the component (b) contained in the photocurable resin composition is 25 to 80% by mass, an amount of the component (c) contained in the photocurable resin composition is 30 to 60% by mass, the component (c) contains a solid tackifier having a softening point of 60 to 150° C. and a liquid plasticizing component, and a mass ratio of the tackifier to the liquid plasticizing component is in a range of 60 to 30:30 to 10.
Dependencies are inferred from the claim text.