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Optical member, adhesive composition and liquid crystal display device

A pressure-sensitive adhesive layer, optical element technology, applied in the direction of optical elements, adhesive types, ester copolymer adhesives, etc., can solve problems such as thinning

Inactive Publication Date: 2015-01-28
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, pressure-sensitive adhesives used in TV polarizers are also showing a trend of thinning

Method used

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  • Optical member, adhesive composition and liquid crystal display device
  • Optical member, adhesive composition and liquid crystal display device
  • Optical member, adhesive composition and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0061] Preparation Example 1: Preparation of Acrylic Polymer (A1)

[0062] A monomer mixture consisting of 89 g n-butyl acrylate (BA), 10 g methyl acrylate (MA), and 1 g hydroxybutyl acrylate (HBA) was charged into a 1000 cc reaction vessel equipped with cooling for temperature control and refluxing nitrogen, then 100 g of ethyl acetate (EAc) was added as solvent. Afterwards, in order to remove oxygen, the mixture was flushed with nitrogen for 20 minutes and kept at 60°C. After the mixture was uniformly mixed, 0.03 g of azobisisobutyronitrile (AIBN) diluted in ethyl acetate at a concentration of 50% was added as an initiator to initiate the reaction. The mixture was reacted for 8 hours, thereby preparing an acrylic polymer having a weight average molecular weight of 1,790,000.

preparation Embodiment 2

[0063] Preparation Example 2: Preparation of Acrylic Polymer (A2)

[0064] Except for using a monomer mixture in which 79 g of n-butyl acrylate (n-BA), 20 g of methyl acrylate (MA), and 1 g of hydroxybutyl acrylate (HBA) were mixed instead of the monomer mixture prepared in Preparation Example 1, An acrylic polymer having a weight average molecular weight of 1,670,000 was prepared in the same manner as described in Preparation Example 1.

preparation Embodiment 3

[0065] Preparation Example 3: Preparation of Acrylic Polymer (A3)

[0066] Except for using a monomer mixture in which 59 g of n-butyl acrylate (n-BA), 40 g of methyl acrylate (MA), and 1 g of hydroxybutyl acrylate (HBA) were mixed in place of the monomer mixture prepared in Preparation Example 1, An acrylic polymer having a weight average molecular weight of 1,890,000 was prepared in the same manner as described in Preparation Example 1.

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Abstract

Provided are an optical member, a pressure-sensitive adhesive composition, and an LCD. The optical member may have excellent endurance reliability even when a pressure-sensitive adhesive layer is formed to have a thickness of 20 μ m or less.

Description

technical field [0001] The present application relates to optical elements, pressure-sensitive adhesive compositions, and liquid crystal display devices. Background technique [0002] Various optical elements, including polarizing plates, retardation plates, optical compensation films, reflective sheets, protective films, and brightness enhancement films, can be attached to liquid crystal display devices (LCDs) with pressure-sensitive adhesives. Research into providing durability to pressure-sensitive adhesives is actively underway to maintain long-term pressure-sensitive adhesive strength even when LCDs are exposed to the external environment. [0003] In particular, when the pressure-sensitive adhesive is used in a pressure-sensitive adhesive film for mobile phones such as smart phones, since mobile devices have become thinner recently, the thickness of the pressure-sensitive adhesive film is also been reduced. For this reason, the allowable range of the thickness of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J133/04G02B5/00C09J4/02G02F1/13
CPCC08L33/08C08L2312/00C09J133/066C09J7/385C09K2323/055C09K2323/057Y10T428/265Y10T428/2891Y10T428/31938C09J133/08C09J2203/318C09J7/20G02B5/30G02F1/1335C09J133/10C09J133/12C09J2433/00C09J2301/302G02F2202/28
Inventor 梁世雨张基硕朴容秀朴敏洙张锡基全锺绿
Owner LG CHEM LTD
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