Unlock instant, AI-driven research and patent intelligence for your innovation.

Adhesive composition for polarizing plate, polarizing plate, and optical display device

A technology of adhesives and compositions, applied in the field of light-curable adhesive compositions, which can solve the problems of reduced polarization efficiency, light leakage, and light leakage of polarizers, and achieve the effects of ensuring cuttability, easy deposition, and preventing breakage

Active Publication Date: 2019-07-30
SAMSUNG SDI CO LTD
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polarizers using radically polymerizable UV-curable adhesives may experience a reduction in polarizing efficiency when exposed to heat and humidity for extended periods of time, and light leakage may occur at cut ends of polarizers dyed with iodine or dyes
In addition, polarizers may experience severe light leakage under harsher conditions than hot and humid conditions (for example, immersed in warm water at a temperature of 60°C)

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
  • Adhesive composition for polarizing plate, polarizing plate, and optical display device
  • Adhesive composition for polarizing plate, polarizing plate, and optical display device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0083] The adhesive composition is obtained by mixing 70 parts by weight of a bifunctional alicyclic epoxy compound, 20 parts by weight of a bifunctional (meth)acrylate compound, 10 parts by weight of a monofunctional (meth)acrylate compound, 2 parts by weight 1 part by weight of a photoacid generator and 1 part by weight of a photoradical initiator.

[0084] Examples 2 to 4

[0085] The adhesive composition was prepared in the same manner as in Example 1, but changed to bifunctional alicyclic epoxy compounds, monofunctional aromatic epoxy compounds, bifunctional (meth)acrylates as listed in Table 1 The amount (unit: parts by weight) of the compound, the monofunctional (meth)acrylate compound, the photoacid generator and the photoradical initiator.

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
modulusaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

Provided are an adhesive composition for a polarizing plate, a polarizing plate, and an optical display device, the adhesive composition comprising an epoxy-based compound, a (meth)acrylate-based compound, a photo-acid generator, and an optical radical initiator, the (meth)acrylate-based compound comprising a mixture of a bifunctional (meth)acrylate-based compound and a monofunctional (meth)acrylate-based compound having a hydrophobic functional group, wherein the adhesive strength measured after the adhesive composition for a polarizing plate is separately applied to a PET film, a TAC film, and a COP film, to which a polarizer is then bound, followed by photo-curing, is about 200 gf / inch or more.

Description

technical field [0001] The present invention relates to an adhesive composition for a polarizing plate, a polarizing plate and an optical display. More specifically, the present invention relates to a photocurable adhesive composition for a polarizing plate, a polarizing plate, and an optical display. Background technique [0002] The liquid crystal display includes a liquid crystal panel and polarizers disposed on two surfaces of the liquid crystal panel. The polarizer includes a polarizer and protective films on both surfaces of the polarizer. Recently, in order to reduce the thickness of the polarizer, the polarizer includes a protective film on one surface of the polarizer and a coating layer on the other surface of the polarizer. [0003] Since the adhesive for the polarizing plate is required to provide adhesion between the polyvinyl alcohol (PVA) film and the cellulose protective film, hydrophilic and water-soluble PVA adhesives are widely used in the art. Polarizi...

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): C09J163/00C09J133/08C09J5/00C08L67/03C08L1/12C08L65/00G02B5/30G09F9/30
CPCC08L1/12C08L65/00C08L67/03C09J5/00C09J163/00C08L2205/05C08G59/24C08G59/68G02B5/3033C09J4/06C08F283/10C09J151/08C08L33/06C08F222/102C09J133/08G09F9/30C09J2301/416C08F220/1812C08F220/18C08F236/02C08G65/2612C08J3/28C09J147/00G02B5/30
Inventor 李昇勋李度宪徐美兰韩仁天
Owner SAMSUNG SDI CO LTD