Photocurable Adhesive Composition

Abstract

The present invention relates to a photocurable adhesive composition capable of providing a laminate having an adhesive strength equivalent to that in the absence of oxygen even when light is irradiated in the presence of oxygen. The photocurable adhesive composition contains (A) (meth)acrylate oligomer, (B) monofunctional (meth)acrylate monomer, (C) di- to tetrafunctional (meth)acrylate A monomer, (D) a photoreaction initiator, (E) a tackifier with a softening point of 70°C to 150°C, and (F) a liquid plasticizer.

Description

technical field

[0001] The present invention relates to a photocurable adhesive composition, a laminate using the photocurable adhesive composition, an optical display using the photocurable adhesive composition, and a method for producing the laminate. Background technique

[0002] In recent years, in image display devices used in smartphones, etc., from the viewpoint of preventing visibility degradation due to surface reflection, the following operations have been performed: Displays such as liquid crystal display panels or organic EL panels The panel is directly bonded; or the display body is bonded to a front panel such as a protective panel, or a touch panel is bonded to a front panel for reinforcement. In the manufacturing method of the image display device, the following method is known: after applying the photocurable resin composition to one base material to be bonded, irradiating ultraviolet rays to form a temporarily cured resin layer of the photocurable resin com...

Examples

preparation example Construction

[0071]

[0072] A photocurable adhesive composition can be prepared by mixing each component. The mixing method is not particularly limited, and various metal and plastic containers, stirring blades, and stirrers can be used.

[0073]

[0074] The photocurable adhesive composition can be used for bonding arbitrary base materials 1 and arbitrary base materials 2 . In addition, the photocurable adhesive composition can be used for lamination of any base material 1 and any base material 2 including irradiating the photocurable adhesive composition with energy rays in the presence of oxygen. Substrate 1 and substrate 2 may be the same substrate or different substrates. At least one of the base material 1 and the base material 2 may be a translucent member. Thereby, a cured resin layer can be formed by irradiating an energy ray (for example, an ultraviolet-ray) to a photocurable adhesive composition from the translucent member side. Examples of the translucent member include...

Embodiment

[0101] Next, the present invention will be described in more detail by way of examples and comparative examples. The present invention is not limited by these Examples. The indications are parts by mass and % by mass unless otherwise specified.

[0102] Each component of the compounding ratio shown in Table 1 was mixed uniformly, and the photocurable adhesive composition of the Example / Comparative Example was prepared.

[0103] Using the photocurable adhesive composition of the obtained Example / Comparative Example, the characteristic was measured as follows.

[0104]

technical field

[0001] The present invention relates to a photocurable adhesive composition, a laminate using the photocurable adhesive composition, an optical display using the photocurable adhesive composition, and a method for producing the laminate. Background technique

[0002] In recent years, in image display devices used in smartphones, etc., from the viewpoint of preventing visibility degradation due to surface reflection, the following operations have been performed: Displays such as liquid crystal display panels or organic EL panels The panel is directly bonded; or the display body is bonded to a front panel such as a protective panel, or a touch panel is bonded to a front panel for reinforcement. In the manufacturing method of the image display device, the following method is known: after applying the photocurable resin composition to one base material to be bonded, irradiating ultraviolet rays to form a temporarily cured resin layer of the photocurable resin com...

Examples

preparation example Construction

[0071]

[0072] A photocurable adhesive composition can be prepared by mixing each component. The mixing method is not particularly limited, and various metal and plastic containers, stirring blades, and stirrers can be used.

[0073]

[0074] The photocurable adhesive composition can be used for bonding arbitrary base materials 1 and arbitrary base materials 2 . In addition, the photocurable adhesive composition can be used for lamination of any base material 1 and any base material 2 including irradiating the photocurable adhesive composition with energy rays in the presence of oxygen. Substrate 1 and substrate 2 may be the same substrate or different substrates. At least one of the base material 1 and the base material 2 may be a translucent member. Thereby, a cured resin layer can be formed by irradiating an energy ray (for example, an ultraviolet-ray) to a photocurable adhesive composition from the translucent member side. Examples of the translucent member include...

Embodiment

[0101] Next, the present invention will be described in more detail by way of examples and comparative examples. The present invention is not limited by these Examples. The indications are parts by mass and % by mass unless otherwise specified.

[0102] Each component of the compounding ratio shown in Table 1 was mixed uniformly, and the photocurable adhesive composition of the Example / Comparative Example was prepared.

[0103] Using the photocurable adhesive composition of the obtained Example / Comparative Example, the characteristic was measured as follows.

[0104]

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