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Acrylic pressure sensitive adhesive compositions having plasticizer

An acrylic pressure-sensitive adhesive and composition technology, applied in the direction of adhesive types, ester copolymer adhesives, adhesives, etc., can solve the problem of not effectively suppressing the migration of antistatic agents, not pointing out, affecting water content And other issues

Active Publication Date: 2013-01-02
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above disclosure, it is not possible to effectively suppress the migration of the antistatic agent
In particular, there is a problem that mura may be caused under conditions of resistance to heat and humidity due to hydrophilicity (a property possessed by polyether polyols)
However, it does not point out: Additives adhered to the protective film of the polarizer affect the water content

Method used

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  • Acrylic pressure sensitive adhesive compositions having plasticizer
  • Acrylic pressure sensitive adhesive compositions having plasticizer
  • Acrylic pressure sensitive adhesive compositions having plasticizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] (Preparation of Acrylic Copolymer)

[0095] A monomer mixture consisting 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 2-hydroxyethyl acrylate (2-HEA) It was charged into a 1 L reactor equipped with a cooling system for nitrogen reflux and easy to adjust the temperature, and then 100 parts by weight of ethyl acetate (EAc) was added as a solvent. To remove oxygen, nitrogen was purged for 1 hour and the temperature was maintained at 55°C. 0.05 parts by weight of azobisisobutyronitrile (AIBN) diluted to a concentration of 50% in ethyl acetate as a reaction initiator was added to the above mixture, and reacted for 8 hours to prepare an acrylic copolymer.

[0096] (combining and coating process)

[0097] With 100 parts by weight of the acrylic copolymer prepared above, 3.0 parts by weight of 1, the prepolymer of 6-hexamethylene diisocyanate (HDI), 2.0 parts by weight of PEL-20A (with the p...

Embodiment 2～5 and comparative Embodiment 1～5

[0102] The same method as in Example 1 above was carried out except that the components and ratios in Example 1 were used as shown in Table 1 below. The units in Table 1 are parts by weight.

[0103] Table 1

[0104]

[0105]

[0106] Using the protective films prepared in the above Examples 1 to 5 and Comparative Examples 1 to 5, haze, wettability, release strength and durability reliability were measured by the following methods, and the results are shown in Table 2 below.

[0107] 1) Turbidity

[0108] After removing the release film attached to the pressure-sensitive adhesive layer from the protective films prepared in the above Examples 1 to 5 and Comparative Examples 1 to 5, the protective films were soaked in deionized water at room temperature and Leave for 1 hour. Moisture covering the periphery of the protective film was then removed to measure a haze value with a reflection-transmittance meter (HR-100, manufactured by Murakami Color Res. Lab.). When the prot...

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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 comprising a) acrylic copolymers; b) a hydrophilic plasticizer; and c) a hydrophobic plasticizer. The acrylic pressure-sensitive adhesive composition according to the present invention has no mura under moisture and heat resistant condition, and thus has an excellent stain resistance of adherends, and an excellent wettability, endurance reliability, transparency and adhesion reliability, regardless of whether surface property of the adherend is hydrophillic or hydrophobic.

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 free of mura (unevenness or spots) under the condition of resistance to heat and humidity, and thus irrespective of whether the surface property of an object is hydrophilic or hydrophobic , which still has excellent stain resistance of the adherend, as well as excellent wettability, durability reliability, transparency and adhesion reliability. Background technique [0002] In general, surface protection films are used when they are attached to an object to be protected (ie, an adherend, which has been treated or restored) using a pressure-sensitive adhesive layer applied to their sides. The purpose of preventing damage or contamination from occurring. [0003] For example, in a polarizing plate used in a panel of a liquid crystal display, an adhesive face of a surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/10
CPCC09J133/08C09J2201/606C09J133/06C09J2301/302C09K2323/031Y10T428/2848C09J133/10
Inventor 高东汉遭显珠张锡基金章洵白允贞
Owner LG CHEM LTD
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