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Tacky-Adhesive Composition

A pressure-sensitive adhesive, pressure-sensitive adhesive layer technology, applied in the direction of adhesive type, ester copolymer adhesive, adhesive, etc., can solve the problem that the polarizing plate is not easy

Active Publication Date: 2015-06-24
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to provide a polarizing plate that satisfies the desired performance without a protective film

Method used

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  • Tacky-Adhesive Composition
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  • Tacky-Adhesive Composition

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0111] Preparation Example 1. Preparation of Block Copolymer (A1)

[0112] Mix an appropriate amount of ethyl 2-bromoisobutyrate (EBiB) and methyl methacrylate (MMA) with ethyl acetate (EAc), seal the flask containing the mixture with a rubber membrane, purged with nitrogen and store at 25 °C. Stir for about 30 minutes to remove dissolved oxygen. After that, an appropriate amount of CuBr 2 , tris(2-pyridylmethyl)amine (TPMA) and tin(II) 2-ethylhexanoate (Sn(EH) 2 ) was added to the oxygen-removed mixture and maintained at about 67° C. in the reaction vessel to initiate the reaction (polymerization of the first block). At a conversion of methyl methacrylate of about 70% to 95%, a mixture of butyl acrylate (BA) and hydroxyethyl acrylate (HEA), previously sparged with nitrogen, was added to have the Ratio of final block copolymer. After that, the CuBr 2 , TPMA and Sn(EH) 2 Added to reaction flask for chain extension reaction (polymerization of second block). When the con...

preparation Embodiment 2 and 3

[0113] Preparation Examples 2 and 3. Preparation of Block Copolymers (B1 and C1).

[0114] A block copolymer was prepared by the same method as described in Preparation Example 1 except controlling the monomer weight ratio of the first block to the second block as shown in Table 1.

[0115] [Table 1]

[0116]

preparation Embodiment 4

[0117] Preparation Example 4. Preparation of Random Copolymer (D1)

[0118] Random copolymers were prepared by adding a monomer mixture comprising butyl acrylate (BA) and 2-hydroxyethyl acrylate (HEA) in a ratio of 80:20 (BA:HEA) to a cooling unit equipped with In a 1-liter reactor with nitrogen reflux and temperature control, add an appropriate amount of n-dodecylmercaptan under molecular weight control, then add ethyl acetate as a solvent, purify with nitrogen for about 60 minutes to remove oxygen, add Azobisisobutyronitrile (AIBN) was used as an initiator while maintaining the temperature at 60° C., and the reaction was performed for about 8 hours. The prepared random copolymer (B4) had a number average molecular weight (Mn) of about 220,000 and a polydispersity index (PDI) of about 5.0.

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Abstract

Provided is a pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition may form a pressure-sensitive adhesive having a fine phase separation structure by a block copolymer including a hard segment and a soft segment, and also has a high elastic modulus and an excellent pressure-sensitive adhesive property. For example, although applied to a thin polarizing plate on at least one surface of which a polarizer protective film is not used, the pressure-sensitive adhesive may allow the polarizing plate to exhibit excellent durability, moisture resistance, workability, a pressure-sensitive adhesive property and a light leakage inhibiting ability.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition, a polarizing plate, and a display device. Background technique [0002] A liquid crystal display (LCD) may include a liquid crystal panel including liquid crystals present between transparent substrates and polarizing plates attached to both sides of the liquid crystal panel. [0003] The polarizer has such figure 1 structure shown. That is, the polarizing plate 100 may include a polarizer 101 having a polarizing function; and polarizer protective films 1021 and 1022 adhered on both surfaces of the polarizer 101, respectively. The polarizing plate 100 may include a pressure sensitive adhesive layer 103 formed under the protective film 1022 for adhesion to the liquid crystal panel, and a release film 104 formed under the pressure sensitive adhesive layer 103 . Additionally, not shown in figure 1 Among them, the polarizing plate may include additional functional films, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/04C09J7/02G02B5/30G02F1/13C09J7/22C09J7/38
CPCG02B5/3025G02F2202/28C09J2203/318C09J2433/00C09J7/38C09J7/387C09J7/22Y10T428/2852C09J2453/00G02F1/133528C08F220/18C09J133/06G02B5/30G02B5/305G02F1/13C09J153/00C09J133/10C09J133/08C09J7/30G02B1/14C09J153/005G02B5/3033
Inventor 尹正爱金鲁马黄仁浩朴寅圭金旼俊金秀静
Owner LG CHEM LTD
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