Transparent adhesive sheet photocurable composition, and transparent adhesive sheet

A technology of curable composition and adhesive sheet, which is applied in the direction of adhesive type, polyurea/polyurethane adhesive, film/sheet adhesive, etc., which can solve the problem of hindering the effective use of light, refractive index difference, Problems such as poor refractive index, to achieve the effect of excellent transparency, high cohesion, and high refractive index

Active Publication Date: 2016-02-10
RESONAC CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in an acrylic adhesive sheet, the refractive index of an acrylic copolymer is generally as low as about 1.47, whereas the refractive index of an optical component such as glass is 1.51 or higher, and polycarbonate is about 1.54. There is a large difference in the refractive index between the acrylic adhesive sheet and the optical part
Therefore, when an acrylic pressure-sensitive adhesive sheet is used as the pressure-sensitive adhesive sheet for optical components, there is a problem that a difference in refractive index occurs at the interface between the optical component and the acrylic pressure-sensitive adhesive, which hinders effective use of light.

Method used

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  • Transparent adhesive sheet photocurable composition, and transparent adhesive sheet

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Embodiment 1～13 and comparative example 1～3

[0142] In addition to the polyurethane (A), (meth)acrylate (B) having a hydroxyl group, (meth)acrylate (C), and components (A) to (C) shown in Table 1, the composition described in Table 1 is blended The polymerizable monomer (D) and the photopolymerization initiator (E) were mixed at room temperature using a disperser to prepare a uniform photocurable composition for a transparent adhesive sheet. Table 1 shows the acid value of the obtained composition. In addition, the numerical values ​​of (A) to (D) components in Table 1 are mass % in (A) to (D) components, and the numerical values ​​of (E) component are relative to 100 mass parts of (A) to (D) components. Content (parts by mass).

[0143] Next, the prepared photocurable composition for a transparent adhesive sheet was coated on a peeled PET film (100 mm×100 mm×75 μm) using an applicator so that the cured film thickness became 100 μm, and the upper surface was covered with a 50 μm film. After covering with a thick peeled...

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Abstract

The Transparent adhesive sheet photocurable composition comprises polyurethane (A), (methyl)acrylate (B) having a hydroxyl, (methyl)acrylate (C) having an aromatic group, polymeric monomer (D) except the components (A) to (C), and a photopolymerization initiator (E), acid value of the composition being 0-5 mgKOH / g, and refractive index of cured compound thereof being 1.50-1.60.

Description

technical field [0001] The present invention relates to a photocurable composition for a transparent adhesive sheet, a transparent adhesive sheet formed by curing the photocurable composition, and the transparent adhesive sheet used for bonding a transparent conductive film transparent conductive film laminate. This laminated body can be used for a touch panel and is useful when used for an image display device. [0002] This application claims the priority of Japanese Patent Application No. 2014-125549 for which it applied in Japan on June 18, 2014, and uses the content here. Background technique [0003] In recent years, touch panels that have been widely seen in the fields of mobile phones and game machines are transparent substrates such as glass with transparent conductive films such as ITO (indium tin oxide) and silver nanowires on the surface layer using transparent adhesive sheets for optics. It is a laminated body in which optical components such as a display devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/06C09J7/00
Inventor 中西健一伊藤大悟佐佐木一博竹内雄太
Owner RESONAC CORP
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