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pressure sensitive adhesive composition

A pressure-sensitive adhesive, pressure-sensitive adhesive technology, applied in the direction of adhesives, film/sheet adhesives, non-polymer adhesive additives, etc., can solve the problem of insufficient tight adhesion, pollution, pressure-sensitive adhesive Mixture residues, etc.

Active Publication Date: 2018-12-14
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such leakage can cause contamination of other optical films or display panels, and can also make it difficult to ensure adequate adhesion at the edge regions of the attached optical film
Furthermore, when rework is required, i.e., the attached optical film has to be peeled off again due to insufficient tight adhesion, the pressure sensitive adhesive may remain in the bonded area, causing various problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0164] Preparation Example 1: Preparation of Acrylic Block Copolymer (A1)

[0165] 0.1 g of ethyl 2-bromoisobutyrate (EBiB) and 28.4 g of methyl methacrylate (MMA) were mixed with 12.4 g of ethyl acetate (EAc). The flask holding the resulting mixture was sealed with a rubber stopper, purged with nitrogen at about 25° C. for about 30 minutes, and stirred. Thereafter, dissolved oxygen was removed by bubbling. Then, 0.002 g of CuBr was added to the deoxygenated mixture 2 , 0.005g tris(2-pyridylmethyl)amine (TPMA), and 0.017g 2,2'-azobis(2,4-dimethylvaleronitrile) (V-65), then at about 67°C Soak in the reaction bath to initiate the reaction (polymerization of the first block). When the conversion of methyl methacrylate reached about 75%, a previously sparged mixture of the following was added in the presence of nitrogen: 310 g butyl acrylate (BA), 1.6 g hydroxybutyl acrylate (HBA), and 500 g Ethyl acetate (EAc). Subsequently, 0.006 g of CuBr was added to the reaction flask 2...

preparation example 2 and 3

[0166] Preparation Examples 2 and 3: Preparation of Acrylic Block Copolymers (A2) and (A3)

[0167] As listed in Table 1 below, a block copolymer was prepared in the same manner as in Preparation Example 1 except that the type of source material (monomer, etc.) and polymerization conditions used to polymerize the block copolymer were adjusted .

[0168] Table 1

[0169]

Embodiment 1

[0171] Preparation of pressure sensitive adhesive composition (coating solution)

[0172] Based on 100 parts by weight of the block copolymer (A1) prepared in Preparation Example 1, the following were mixed: 0.1 parts by weight of a crosslinking agent (Coronate LS commercially available from Nippon Polyurethane Industry Co., Ltd.), 0.5 parts by weight Multifunctional epoxy compound (N,N,N',N'-tetraglycidylethylenediamine), 1.0 parts by weight ionic liquid (FC-4400 commercially available from 3M), 0.01 parts by weight 2-methylimidazole (commercially available from Acros Pvt.Ltd.), 0.01 parts by weight of dibutyltin dilaurate (commercially available as DBTDL from AlfaAesar), and 0.4 parts by weight of a silane coupling agent containing a β-cyanoacetyl group (commercially available as AD M-812 from LG Chem. Ltd.), and then blending ethyl acetate as a solvent to achieve a coating solids content of about 10% to 13% by weight, thereby preparing a coating solution (i.e., pressure sen...

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Abstract

Provided are pressure-sensitive adhesive compositions that can have excellent durability under high temperature or humidity conditions and exhibit high tight adhesion to optical films, thereby forming a Pressure sensitive adhesive. In addition, there is provided a pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive capable of effectively suppressing warping when applied to a thin substrate, such as a very thin glass substrate, enabling a stable physical The time required for properties is minimized, and deterioration of assured physical properties is prevented in time; pressure-sensitively bonded optical elements formed using such a pressure-sensitive adhesive composition; optical laminates; and display devices.

Description

technical field [0001] This application claims Korean Patent Application No. 2014-0181434 filed on December 16, 2014, Korean Patent Application No. 2014-0187438 filed on December 23, 2014, and Korean Patent Application No. 2014-0187438 filed on December 15, 2015 at the Korean Intellectual Property Office Korean Patent Application No. 2015-0179554, the contents of which are hereby incorporated by reference in their entirety for all purposes as fully set forth below. [0002] The present application relates to a pressure sensitive adhesive composition, an optical laminate, a polarizing plate and a display device. Background technique [0003] Display devices are typically implemented using pressure sensitive adhesives or adhesives. For example, a liquid crystal display device (LCD) includes a liquid crystal panel and an optical film serving as a display panel. Among them, the optical film may be attached to the liquid crystal panel using a pressure sensitive adhesive or an a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/00C09J201/06C09J11/06G02B5/30G02F1/133C09J7/22C09J7/38
CPCC09J7/38C09J11/06C09J153/00C09J201/06G02B5/30G02F1/133C09J2203/318C09J7/22C08F293/005C09J2401/006C09J2453/00G02F1/133528G02F2202/28C08F293/00C08K5/3412C08K5/3445C09J2467/005
Inventor 金基暎金一进尹正爱尹圣琇金秀静洪详贤
Owner LG CHEM LTD