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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 reduced reoperability, difficulty in re-attaching, easy to produce residual glue, etc., and reach the pot life Effects of long life, excellent durability and reworkability, and excellent antistatic performance

Active Publication Date: 2020-10-16
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In general, if the adhesive layer is made soft, adhesive residue is likely to occur, and reworkability tends to decrease
That is, it is difficult to peel off in the case of wrong bonding, and it is difficult to re-bond

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

preparation example Construction

[0108] In order to avoid an increase in the viscosity of the pressure-sensitive adhesive composition, each monomer used for the preparation of the copolymer of the main component, it is preferable to reduce the amount of the polyfunctionality (difunctionality or more) monomer which can function as a crosslinking agent as much as possible. In particular, (D) polyalkylene glycol mono(meth)acrylate monomer is preferably used because the corresponding diester component is a di(meth)acrylate of a difunctional monomer.

[0109] The copolymer is preferably an acrylic polymer, and preferably contains (meth)acrylate monomer or (meth)acrylic acid, (meth)acrylic acid, (meth)acrylic acid, base) acrylic monomers such as acrylamides.

[0110] In addition, the acid value of the acrylic polymer is preferably from 0.01 to 8.0. Thereby, the contamination property can be improved, and the performance of preventing the generation of adhesive residue can be improved.

[0111] Here, the "acid val...

Embodiment 1

[0123] Nitrogen gas was introduced into a reaction device equipped with a stirrer, a thermometer, a reflux cooler, and a nitrogen introduction pipe, and the air in the reaction device was replaced with nitrogen gas. Then, add 100 parts by weight of 2-ethylhexyl acrylate, 3.0 parts by weight of 8-hydroxyoctyl acrylate, 0.2 parts by weight of acrylic acid, polypropylene glycol monoacrylate (the alkylene that constitutes the polyalkylene glycol chain) in the reaction device. The average number of repeating units of oxy groups n=12, the absorbance in the state of 25% aqueous solution is 0.03) 10 parts by weight, 5 parts by weight of N-vinylpyrrolidone and 60 parts by weight of solvent (ethyl acetate). Then, 0.1 weight part of azobisisobutyronitrile was dripped as a polymerization initiator over 2 hours, and it was made to react at 65 degreeC for 6 hours, and the acrylic acid copolymer solution used in Example 1 with a weight average molecular weight of 500,000 was obtained. A part...

Embodiment 2～6 and comparative example 1～4

[0125] Except that the composition of the monomer is as described in (A) to (D), (G) and (F2) of Table 1, in the same manner as the above-mentioned acrylic acid copolymer solution used in Example 1, obtained in Acrylic copolymer solution used in Examples 2-6 and Comparative Examples 1-4.

[0126]

[0127] [Example 1]

[0128] For the acrylic acid copolymer solution of Example 1 prepared above, add 1.0 parts by weight of 1-octylpyridinium hexafluorophosphate, 8.5 parts by weight of acetylacetone and stir, then add the isocyanurate of pentamethylene diisocyanate compound 0.5 parts by weight of titanium triacetylacetonate and 0.1 parts by weight of titanium triacetylacetonate were stirred and mixed to obtain the adhesive composition of Example 1. After coating this adhesive composition on a release film made of a silicone resin-coated polyethylene terephthalate (PET) film, the solvent was removed by drying at 90°C to obtain an adhesive layer Adhesive sheets with a thickness o...

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Abstract

The present invention provides a film for forming a surface protective film for a polarizing plate having excellent antistatic properties, excellent balance of adhesion at low-speed peeling speeds and high-speed peeling speeds, long pot life, durability, and reworkability Adhesive composition and surface protection film for an adhesive layer. The adhesive composition contains: (A) at least one (meth)acrylate monomer with an alkyl group having carbon atoms of C4 to C18; (B) a hydroxyl group-containing copolymerizable monomer; Acrylic polymers of copolymers formed by copolymerization of at least one or more of (C) carboxyl-containing copolymerizable monomers and (D) polyalkylene glycol mono(meth)acrylate monomers; (E ) crosslinking agent; (F) antistatic agent. Among them, the (E) crosslinking agent is a bifunctional or higher pentamethylene diisocyanate compound, and the (F) antistatic agent is an ionic compound having a melting point of 25 to 50°C and being solid at a temperature of 25°C.

Description

technical field [0001] The present invention relates to an adhesive composition and a surface protection film. More specifically, it relates to a polarizing plate forming film having excellent antistatic performance, excellent balance of adhesive force at low-speed peeling speed and high-speed peeling speed, long pot life, durability and reworkability. The adhesive composition of the adhesive layer of a surface protection film, and a surface protection film. Background technique [0002] Conventionally, in the production process of optical components such as polarizers and retardation plates constituting components of liquid crystal displays, a surface protection film is attached to temporarily protect the surface of the optical components. This surface protection film is only used in the process of producing an optical component, and when the optical component is assembled into a liquid crystal display, it is peeled and removed from the optical component. The surface prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/08C09J11/06C09J7/30C08F283/06C08F220/18C08F220/06C08F220/28
CPCC09J7/255C09J11/06C09J151/08C08F283/065C09J7/30C08F220/1802C08F220/06C08F220/20C08F226/10C08K5/29C08F220/281C08F220/1808G02B1/10C09J133/08C09J133/10C09J2203/318C09J2301/124C09J2301/122
Inventor 长仓毅长谷川良吉田弘幸菱沼昌世铃木史惠大津贺健太郎
Owner FUJIMORI KOGYO CO LTD
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