UV-curable optical resin adhesive composition

A technology of optical resins and adhesives, applied in the directions of optics, non-polymer organic compound adhesives, adhesives, etc., to achieve the effects of improved coating, improved chemical resistance, and reduced viscosity

Inactive Publication Date: 2012-05-23
NITTO DENKO CORP
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refractive index of the liquid crystal display panel (LCD module) with various polarizers and the protective cover sheet (front cover) is about 1.5 relative to the refractive index of the air in the above-mentioned air gap structure. Therefore, from the LCD module The image light emitted by the device is diffused and scattered in the panel, or due to the reflection of external light such as sunlight, etc. In general, the decrease in brightness and the deterioration of contrast cannot be avoided, and the quality of the image product may not be said to be high. Looking for a higher quality image display

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
  • UV-curable optical resin adhesive composition
  • UV-curable optical resin adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 40g (0.0784mol in terms of OH groups) as a vinyl polymer containing hydroxyl groups, a liquid acrylic polymer with a viscosity of 6000mPa·s, a weight average molecular weight of 2000, and a hydroxyl equivalent (OHV) of 110mgKOH / g, 14.6g (0.0941mol ) 2-isocyanatoethyl methacrylate was put into the reaction vessel respectively, and kept at 50° C. in a water bath under nitrogen flow. Then, 0.028 g (0.19 weight% with respect to 2-isocyanatoethyl methacrylate) of dibutyltin dilaurate (catalyst) was added, and it was kept for 8 hours, and it reacted. Then, using infrared absorption spectroscopy (FT-IR: manufactured by Thermo Electron Co., Ltd., FT-IR200 type), it was confirmed that the 2260 cm in the reaction product -1 (the characteristic absorption band originating from the isocyanate group) disappears. From this, it was found that an acrylic polymer (weight average molecular weight: 2100) having a methacryloyl group in the side chain was generated.

[0058] Next, 8 g of ...

Embodiment 2

[0060] 40g (0.0143mol in terms of OH groups) as a vinyl polymer containing hydroxyl groups, a liquid acrylic polymer with a viscosity of 14000mPa·s, a weight average molecular weight of 11000, and a hydroxyl equivalent (OHV) of 20mgKOH / g, 2.65g (0.0171mol ) 2-isocyanatoethyl methacrylate was put into the reaction vessel respectively, and kept at 50° C. in a water bath under nitrogen flow. Then, 0.006 g (0.23 weight% with respect to 2-isocyanatoethyl methacrylate) of dibutyltin dilaurate (catalyst) was added, and it was kept for 8 hours, and it reacted. Then, using infrared absorption spectroscopy (FT-IR: manufactured by Thermo Electron Co., Ltd., FT-IR200 type), it was confirmed that the 2260 cm in the reaction product -1 (the characteristic absorption band originating from the isocyanate group) disappears. From this, it was found that an acrylic polymer (weight average molecular weight: 12,000) having a methacryloyl group in the side chain was produced.

[0061] Next, excep...

Embodiment 3

[0063] Prepare 9.5 g of the acrylic polymer having a methacryloyl group in the side chain prepared in Example 2 above, 0.5 g of tetrahydrofurfuryl acrylate as a diluent, and 0.21 g of 1-hydroxy- Cyclohexyl-phenyl-ketone, 0.9 g bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide. Except for this, it carried out similarly to Example 1, and prepared the target ultraviolet curable optical resin adhesive composition.

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
viscosityaaaaaaaaaa
Login to view more

Abstract

A UV-curable optical resin adhesive composition is provided, which is excellent in transparency, adhesive reliability and durability and suitable for rework (repair) without an adverse influence on the brightness, the contrast and the Quality of a display image. The UV-curable optical resin adhesive composition is used for filling a gap between an image display panel and a protective cover plate, and comprises: (A) an acryl polymer having a (meth)acryloyl group at its side chain; and (B) a photopolymerization initiator.

Description

technical field [0001] The present invention relates to an ultraviolet curable optical resin adhesive composition for filling the gap between the two in a display structure in which a protective cover plate and an image display panel are laminated and bonded. For use, it is excellent in image display quality, transparency, adhesion reliability, and durability in terms of brightness maintenance and high contrast maintenance, and is suitable for reprocessing (repair). Background technique [0002] In recent years, with the development of advanced information society, various display electronic devices such as image display panels such as organic EL display devices and liquid crystal display devices and electrophoretic display devices, and optical devices such as organic EL lighting devices, optical elements, and optical waveguides have been proposed. Devices, thin-film silicon solar cells, organic thin-film solar cells and dye-sensitized solar cells and other solar cells and m...

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): C09J4/02
CPCC09J4/06C09J133/04C09J11/00G02B1/00
Inventor 五十岚一雅长谷川由纪
Owner NITTO DENKO CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap