Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transparent adhesive sheet photocurable composition, and transparent adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
acid valueaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com