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Adhesive composition and surface protection film

A composition and adhesive technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of easy reduction in reworkability, adhesive residue, and difficulty in peeling, etc., to reduce additives Amount, improve the performance of preventing adhesive residue, good effect of antistatic function

Active Publication Date: 2016-08-31
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Generally, if the adhesive layer is soft, adhesive residues tend to occur and reworkability tends to decrease
That is, it is difficult to peel off after a wrong fit, and it is difficult to reattach

Method used

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  • Adhesive composition and surface protection film
  • Adhesive composition and surface protection film
  • Adhesive composition and surface protection film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Nitrogen gas was introduced into a reaction apparatus equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe, thereby replacing the air in the reaction apparatus with nitrogen. Then, added the 2-ethylhexyl acrylate of 100 weight parts, the 8-hydroxyoctyl acrylate of 0.9 weight part, the acrylic acid of 0.5 weight part, the polypropylene glycol monoacrylate of 10 weight parts The average repeating number of alkylene oxide of the alkyl diol chain (n=12), 5 parts by weight of N-vinylpyrrolidone, and 60 parts by weight of solvent (ethyl acetate) were added at the same time. Then, 0.1 parts by weight of azobisisobutyronitrile as a polymerization initiator was dropped over 2 hours, and reacted at 65° C. for 6 hours to obtain acrylic acid used in Example 1 with a weight average molecular weight of 500,000. Copolymer Solution 1. A part of the acrylic copolymer was used as a sample for acid value measurement described later.

Embodiment 2～9 and comparative example 1～4

[0123] Except that the composition of each monomer was adjusted as described in (A) to (E) in Table 1, the above-mentioned acrylic copolymer solution 1 used in Example 1 was operated in the same manner to obtain the 2-9 and the acrylic acid copolymer solutions in Comparative Examples 1-4.

[0124] Table 1

[0125]

[0126]

[0127] [Example 1]

[0128] To the acrylic copolymer solution 1 of Example 1 manufactured as described above, 2.5 parts by weight of acetylacetone was added and stirred, and then 1.0 parts by weight of Coronate HX (Coronate HX, isocyanuric acid of a hexamethylene diisocyanate compound) was added. ester), 0.2 parts by weight of Coronate L (the adduct of Coronet L, toluene diisocyanate compound and trimethylolpropane), 0.02 parts by weight of dioctyltin dilaurate and then stirred and mixed to obtain the binder combination of Example 1 thing. This adhesive composition was coated on a release film composed of a polyethylene terephthalate (PET) film coa...

Embodiment 11

[0166] Nitrogen gas was introduced into a reaction apparatus equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe, thereby replacing the air in the reaction apparatus with nitrogen. Then, added the 2-ethylhexyl acrylate of 100 weight parts, the 8-hydroxyoctyl acrylate of 0.9 weight part, the acrylic acid of 0.5 weight part, the polypropylene glycol monoacrylate of 10 weight parts The average repeating number of the alkylene oxide of the alkyl diol chain is n=12), 5 parts by weight of N-vinylpyrrolidone, and 60 parts by weight of solvent (ethyl acetate) were added at the same time. Then, 0.1 parts by weight of azobisisobutyronitrile as a polymerization initiator was dropped over 2 hours, and reacted at 65° C. for 6 hours to obtain acrylic acid used in Example 1 with a weight average molecular weight of 500,000. Copolymer Solution 1. A part of the acrylic copolymer was taken and used as a sample for acid value measurement described later....

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Abstract

The invention provides an adhesive composition having excellent anti-static performance, excellent balance in adhesive property at both low stripping speed and high stripping speed, and excellent durability and re-processability, and a surface protection film. The adhesive composition includes an acrylic polymer including at least one copolymer from (A) (meth) acrylate monomers having alkyl groups with the carbon atom number being C4 to C18, (B) copolymerizable monomers containing hydroxyl groups, (C) copolymerizable monomers having carboxyl groups, (D) polyalkylene glycol single (meth) acrylate monomers, and (E) hydroxyl group-free and nitrogen-containing vinyl monomers or a (meth) alkyl acrylate monomers containing alkoxy groups. The adhesive composition further includes (F) an isocyanate composition having more than three functional groups, (G) a cross-linking suppressor, (H) a cross-linking catalyst and (I) an anti-static agent. The acid value of the acrylic polymer is 0.01 to 8.0.

Description

technical field [0001] The present invention relates to a surface protection film used in the manufacturing process of a liquid crystal display. More specifically, the present invention relates to an adhesive for a surface protection film for protecting the surface of an optical component such as a polarizing plate or a retardation plate by sticking on the surface of an optical component such as a polarizing plate or a retardation plate constituting a liquid crystal display. An adhesive composition, and a surface protection film using the adhesive composition. Background technique [0002] Conventionally, in the manufacturing process of optical components such as polarizing plates and retardation plates, which are components of liquid crystal displays, a surface protection film is attached to temporarily protect the surface of the optical component. Such a surface protection film is used only in the process of manufacturing an optical component, and when the optical compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/00C09J133/08C09J11/06C09J7/02G02B1/14
CPCC09J4/00C09J7/20
Inventor 长仓毅岛口龙介长谷川良远藤佳子
Owner FUJIMORI KOGYO CO LTD
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