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 difficult to suppress static electricity, strength reduction, pollution, etc.

Active Publication Date: 2015-05-27
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: the preparation of acrylic acid (ester) polymer A

[0159] 80 parts by weight of 2-ethylhexyl acrylate (2-EHA), 2 parts by weight of 4-hydroxybutyl acrylate (4-HBA), 8 parts by weight of 2-hydroxyethyl acrylate (2-HEA) and 10 parts by weight of polyethylene glycol monomethyl ether methacrylate (the molar number of oxyethylene units added: 9 mol) were added to a 1L reactor equipped with a cooling device that was easy to carry out nitrogen reflux and easy to adjust the temperature, 100 parts by weight of ethyl acetate was added as a solvent. Subsequently, the reactor was purged with nitrogen for 1 hour to remove oxygen, a reaction initiator (AIBN: azobisisobutyronitrile) was added, reacted for about 8 hours, and the reaction product was diluted with ethyl acetate to obtain acrylic acid (ester) class copolymer A. Copolymer A had a viscosity of about 2500 cP and a solids content of about 45%.

preparation example 2-10

[0160] Preparation example 2-10. Preparation of acrylic acid (ester) copolymer B-J

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

[0162] Table 1

[0163]

[0164] Table 2

[0165]

Embodiment 1-10 and comparative example 1-5

[0167] Tinuvin-144, Tinuvin-765, Irganox 1010 or Irganox 2450 are mixed with each kind of acrylic (ester) copolymer prepared in the preparation example according to the proportion listed in Table 3 and 4 respectively (relative to 100 parts by weight described Acrylic (ester) copolymer). Each mixture was placed in an oven set at 45° C. for 28 days, after which the transparency, viscosity retention and solids content of the copolymers were observed. After storing the copolymers as described above, the clarity of the polymers was determined by visual inspection of the polymers. In this case, when the copolymer is transparent, it is marked as "A", and when fogging is observed due to the presence of crystalline foreign matter, it is marked as "B". The results of the determination of the respective acrylic copolymers are summarized in Tables 5 and 6.

[0168] table 3

[0169]

[0170] Table 4

[0171]

[0172] table 5

[0173]

[0174] Table 6

[0175]

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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): C09J133/06C09J11/06C09J7/02
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 金基暎尹圣琇裴正植
Owner LG CHEM LTD
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