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Pressure-sensitive adhesive composition

A technology of pressure-sensitive adhesives and compositions, applied in the direction of adhesive types, conductive adhesives, ester copolymer adhesives, etc., can solve problems such as difficulty in suppressing static electricity, strength reduction, pollution, etc.

Active Publication Date: 2015-05-20
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the above method, contamination due to the transfer of the pressure-sensitive adhesive components to the product to be protected occurs, it is difficult to suppress static electricity generated early, and the low-speed peel strength, which is important for obtaining the protective function, decreases too much

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0154] Preparation Example 1: Preparation of Acrylic (Ester) Polymer (A)

[0155] 85 parts by weight of 2-ethylhexyl acrylate (2-EHA), 2 parts by weight of 4-hydroxybutyl acrylate (4-HBA), 5 parts by weight of 2-hydroxyethyl acrylate (2-HEA), 3 parts by weight of dimethylacrylamide and 5 parts by weight of polyethylene glycol monomethyl ether methacrylate (the number of moles added to the ethylene oxide unit: 9 mol) were added to a machine equipped with nitrogen reflux and easy to control temperature. The 1 L reactor of the apparatus was cooled, and then 100 parts by weight of ethyl acetate was added as a solvent. Subsequently, nitrogen was purged for 1 hour to remove oxygen, a reaction initiator (AIBN: azobisisobutyronitrile) was added to react for about 8 hours, and the reaction product was diluted with ethyl acetate. Acrylic (ester) polymer A was thus prepared.

preparation example 2 to 9

[0156] Preparation examples 2 to 9: the preparation of acrylic acid (ester) polymers B to I

[0157] An acrylic (ester) polymer was prepared in the same manner as described in Preparation Example 1, except that the ratio of the monomers used to prepare the polymer was changed as shown in Table 1.

[0158] [Table 1]

[0159]

Embodiment 1

[0161] Preparation of pressure sensitive adhesive composition

[0162] A pressure-sensitive adhesive composition is prepared by uniformly mixing 5.0 parts by weight of isophorone diisocyanate-based A mixture of crosslinking agent and hexamethylene diisocyanate-based crosslinking agent (MHG-80B, Asahi Chemical Company (AKCC)) and 0.5 parts by weight of lithium bis(trifluoromethanesulfonyl)imide (LiTFSi ), and dilute the resulting mixture to an appropriate concentration in consideration of the coating properties.

[0163] Preparation of pressure sensitive adhesive sheets

[0164] By coating the prepared pressure-sensitive adhesive composition on one surface of a poly(ethylene terephthalate) (PET) film (thickness: 38 μm) and drying, a uniform coating was formed to have a thickness of about 20 μm. . Subsequently, the coating was kept at about 90° C. for 3 minutes to initiate a crosslinking reaction, thereby preparing a pressure-sensitive adhesive sheet.

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Abstract

A pressure-sensitive adhesive composition, a protective film, an optical element and a display device are provided. The pressure-sensitive adhesive composition has excellent storage stability, exhibits proper low-speed and high-speed peel strengths after formation of a cross-linked structure, and also has an excellent balance between the low-speed and high-speed peel strengths. Therefore, when the pressure-sensitive adhesive composition is applied to a protective film, the pressure-sensitive adhesive composition can have an excellent protective effect, and can also be advantageous to perform a high-speed process since the pressure-sensitive adhesive composition is easily peeled during a high-speed peeling process. In the high-speed peeling process, the pressure-sensitive adhesive composition can exhibit excellent antistatic characteristics.

Description

technical field [0001] The present invention relates to a pressure sensitive adhesive composition, a film for protecting an optical device, an optical device and a display device. Background technique [0002] Protective films can be used to prevent adhesion and scratches of pollutants such as dust on optical devices such as polarizers, various plastic products, electronic products, or automobiles. Protective films may require adequate peel strength and antistatic properties. [0003] For example, when a protective film is peeled at high speed for use of a product or other products assembled, a relatively low peel strength (hereinafter referred to as "high-speed peel strength") is required. However, when the protective film is peeled at a low speed, the protective film can exhibit a suitable protective function with a relatively high peel strength (hereinafter referred to as "low-speed peel strength"). [0004] In addition, the static electricity generated by the peeling o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06C09J11/02C09J7/02
CPCC09J133/066C09J133/14C09J2203/318G02F2202/28Y10T428/1462Y10T428/2848Y10T428/2887Y10T428/2891C08K5/3435Y10T428/31935Y10T428/31938C09J7/385G02B1/18C09J2301/122C09J2301/124C09J2301/302C09J11/06C09J133/08H04B1/3888C09J2433/00G02B1/14G02B1/16C09J9/02
Inventor 金基映金鲁马黄仁浩朴寅圭
Owner LG CHEM LTD