Acrylic pressure sensitive adhesive compositions

An acrylic pressure-sensitive adhesive, acrylic copolymer technology, applied in the direction of adhesive types, ester copolymer adhesives, adhesives, etc., can solve the problem of changing the adhesion, affecting the wettability of the anti-glare layer, and low-speed peeling Problems such as reduction in strength

Active Publication Date: 2009-11-18
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the glass transition temperature of the binder resin in the above method will adversely affect the wettability of the anti-glare layer
[0006] Meanwhile, in Japanese Unexamined Patent Publication No. 2005-023143, high-speed releasability is imparted by adding phosphate ester of polyoxyalkylene alkyl ether to acrylate copolymer, but the additive changes Adhesion is reduced, resulting in a decrease in low-speed peel strength (releasestrength)

Method used

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  • Acrylic pressure sensitive adhesive compositions
  • Acrylic pressure sensitive adhesive compositions
  • Acrylic pressure sensitive adhesive compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] [Preparation of Acrylic Copolymer]

[0069] A monomer mixture of 89.0 parts by weight of 2-ethylhexyl acrylate (2-EHA), 9.0 parts by weight of n-butyl acrylate (BA) and 2.0 parts by weight of hydroxyethyl acrylate (2-HEA) was added to Into a 1 L reactor equipped with nitrogen reflux and a temperature-adjusting cooling system, 100 parts by weight of ethyl acetate (EAc) was added thereto as a solvent. In order to remove the oxygen therein, nitrogen gas was passed for 1 hour under the condition of maintaining the temperature at 55°C, and then 0.05 parts by weight of azobisisobutyronitrile (AIBN) diluted in ethyl acetate at a concentration of 50% was added thereto as a reaction initiator. The mixture was reacted for 8 hours to obtain an acrylic copolymer.

[0070] [Mixing and coating procedure]

[0071] Add 3.0 parts by weight of hexamethylene diisocyanate (HDI) prepolymer as a crosslinking agent and 2.0 parts by weight of dibutyl phthalate to 100 parts by weight of the ...

Embodiment 2～4 and comparative Embodiment 1～5

[0076] An acrylic copolymer was prepared by the same method as in Example 1 except using the components and ratios shown in Table 1. The units in Table 1 are parts by weight.

[0077] [Table 1]

[0078]

[0079]The peel strength, wettability and durability reliability of the protective films prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were tested by the following methods, and the results are shown in Table 2.

[0080] A.180°peel strength

[0081] According to JIS Z 0237, the protective films prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were adhered to the surface of triacetyl cellulose (TAC, Japan Fuji Film Co., Ltd.) A glare layer (AG, DNP Co., Ltd., Japan) was on the surface. These samples were kept at a temperature of 23°C and a relative humidity of 65% for 24 hours and at a temperature of 70°C for 100 hours. Peel strength was then measured using a tensile tester under the conditions of an angle of 180 degrees and separation speeds of 0...

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Abstract

The present invention relates to an acrylic pressure sensitive adhesive composition. More specifically, the present invention relates to an acrylic pressure sensitive adhesive composition which comprises a) acrylic copolymers; and b) a compound having an ester value of 200 or more. The acrylic pressure sensitive adhesive composition of the present invention has an excellent wettability to the surface of an adhered article with surface unevenness, an excellent endurance reliability, transparency, and stain resistance of adhered article, and a high-rate release property without any considerable change of adhesive properties.

Description

technical field [0001] The present invention relates to an acrylic pressure sensitive adhesive composition. More specifically, the present invention relates to an acrylic pressure-sensitive adhesive composition comprising: a) an acrylic copolymer; and b) a compound having an esterification value of 200 or more. The composition of the present invention has excellent wettability to the surface of an adhered article with an uneven surface, has excellent durability reliability, transparency and stain resistance of the adhered article, and has high-speed peeling property. Background technique [0002] Recently, due to the increase in demand for liquid crystal display devices, the demand for films having optical properties such as polarizers is also rapidly increasing. Therefore, there is a need for a method capable of implementing high-speed production of liquid crystal display devices. In addition, mainstream LCD manufacturers focus on producing small panels below 20 inches. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06
CPCC09J133/08C09J2201/606C09J133/06C08L2666/02C09J2301/302C09K2323/05C09K2323/057Y10T428/24975F24F6/14F24F13/24F24F2006/008B32B2457/202G02B5/30
Inventor 高东汉遭显珠张锡基金章洵白允贞
Owner LG CHEM LTD
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