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Adhesive composition

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

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

[0158] Preparation Example 1: Preparation of Acrylic (Ester) Polymer (A)

[0159] 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. Thereby, an acrylic (ester) type polymer (A) was prepared.

preparation example 2 to 12

[0160] Preparation Examples 2 to 12: Preparation of Acrylic (Ester) Polymers B to L

[0161] An acrylic (ester) polymer was prepared in the same manner as described in Preparation Example 1, except that the proportion of monomers used to prepare the polymer was changed as shown in Table 1 and Table 2.

[0162] [Table 1]

[0163]

[0164] [Table 2]

[0165]

Embodiment 1

[0167] Preparation of pressure sensitive adhesive composition

[0168] 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.

[0169] Preparation of pressure sensitive adhesive sheets

[0170] 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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PUM

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Abstract

The present application relates to an adhesive composition, a protection film, an optical device, and a display device. The adhesive composition of the present application has excellent storage stability, exhibits appropriate low-rate and high-rate peeling forces after the formation of a cross-linking structure, and is excellent in terms of quantum balance. Thus, when being applied to, for example, a protection film, the adhesive composition has an excellent protective effect, can be easily peeled at the time of high-rate peeling and thus favorable in terms of a high-rate process, and can exhibit an excellent anti-static property during the process.

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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IPC IPC(8): C09J133/06C09J11/02C09J7/02
CPCC09J2203/318C09D133/066C09J7/385C09J4/06C08F220/1808C08F290/062C09J151/08C08F265/06C08F220/20C08F220/54C08F220/1804C08F220/286C09J11/06C09J133/06C09J133/14C08K3/10C08K5/17C08K5/0075C09J2301/302C09J2301/408G02B1/14B32B7/12B32B2307/40B32B2307/50C09J133/066C09J2433/00G02B5/30
Inventor 裴正植尹圣琇金基暎
Owner LG CHEM LTD
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