Adhesive composition for polarizing plate, polarizing plate and optical display
A technology of adhesives and compositions, applied in the direction of adhesive types, non-polymer adhesive additives, non-polymer organic compound adhesives, etc., can solve the problem of deterioration of polarization efficiency of polarizing plates, cut ends of polarizing plates Light leakage, polarizer light leakage and other problems, to achieve the effect of good coatability and good flatness
Active Publication Date: 2020-12-22
SAMSUNG SDI CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Polarizing plates using radically polymerizable UV-curable adhesives may suffer from deterioration in polarization efficiency when exposed to hot and humid conditions for a long period of time, and light leakage may occur at the cut ends of polarizers dyed with iodine or dyes
In addition, under conditions worse than hot and humid conditions (for example, immersed in warm water having a temperature of 60° C.), polarizers may suffer from severe light leakage
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0098] By mixing 70 parts by weight of a bifunctional cycloaliphatic epoxy compound, 5 parts by weight of a monofunctional aromatic epoxy compound, 5 parts by weight of a hydrogenated aromatic epoxy compound, and 20 parts by weight of a bifunctional (meth)acrylate compound, 2 parts by weight of a photoacid generator, and 1 part by weight of a photoradical initiator to prepare an adhesive composition.
Embodiment 2 and 3
[0100] The adhesive composition was prepared in the same manner as in Example 1, except that the difunctional cycloaliphatic epoxy compound, monofunctional aromatic epoxy compound, difunctional (meth)acrylate compound, hydrogenated The amounts of the aromatic epoxy compound, the photoacid generator, and the photoradical initiator are listed in Table 1 (unit: parts by weight).
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Abstract
An adhesive composition for a polarizing plate, a polarizing plate and an optical display are disclosed. The adhesive composition for polarizing plates contains an epoxy compound, a (meth)acrylate compound, and a photoinitiator. Epoxy compounds include alicyclic epoxy compounds and hydrogenated aromatic epoxy compounds, which have a glass transition temperature of 100° C. or lower in the homopolymer phase, and (meth)acrylate compounds include bifunctional (methyl) base) acrylate compound, and the adhesive composition for polarizing plates has a curing shrinkage ratio of 10% or less as calculated by Equation 1, and a glass transition temperature of 110° C. or higher after photocuring .
Description
[0001] Citations to related applications [0002] This application claims the benefit of Korean Patent Application No. 10-2016-0156845 filed with the Korean Intellectual Property Office on November 23, 2016, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to an adhesive composition for a polarizing plate (polarizing plate), a polarizing plate, and an optical display. More specifically, the present invention relates to photocurable adhesive compositions for polarizing plates, polarizing plates, and optical displays. Background technique [0004] A liquid crystal display includes a liquid crystal panel and polarizing plates disposed on both surfaces of the liquid crystal panel. The polarizing plate includes a polarizer and protective films on both surfaces of the polarizer. Recently, a polarizing plate includes a protective film on one surface of the polarizing plate and a coating on the other surface...
Claims
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IPC IPC(8): C09J4/06C09J4/02C09J11/06G02B5/30G02F1/1335
CPCC09J4/06C09J11/06G02B5/305G02F1/133528C09J133/068C09J163/00G02B5/3083G02F1/13363
Inventor 李度宪徐美兰李昇勋韩仁天
Owner SAMSUNG SDI CO LTD