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Adhesive composition and laminated film using same

A technology of adhesives and compositions, applied in the direction of adhesive types, ester copolymer adhesives, polyurea/polyurethane adhesives, etc. It is easy to produce glue residue and other problems, and achieve the effect of good peelability, less glue residue and less change

Active Publication Date: 2021-07-23
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when an acrylic resin is used for the adhesive layer, there is a problem that smears are likely to be generated during peeling. When using it as a surface protection film for protecting the surface of optical components, electronic components, etc. There is a problem
[0008] As a solution to the above-mentioned problems, for example, a method is provided in which a urethane-based resin using a specific polyfunctional polyol is used as an adhesive agent (for example, refer to Patent Document 2), but lacks the balance between the optimization of residual glue and adhesive force

Method used

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  • Adhesive composition and laminated film using same
  • Adhesive composition and laminated film using same
  • Adhesive composition and laminated film using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0283] Hereinafter, several examples related to the present invention will be described, but the present invention is not intended to be limited to the contents shown in the examples. In addition, unless otherwise specified, "part" and "%" in the following description and a table represent a mass basis, a solid content, or an active ingredient.

[0284] In addition, the evaluation in the Example was performed as follows.

[0285]

[0286] The laminated film obtained by reciprocating a 2kgf roller once was crimped and pasted on a glass plate, and after 24 hours after pasting, the adhesion was measured using an adhesion / coating peeling analyzer VPA-3 (manufactured by Kyowa Interface Science Co., Ltd.). force. Measurement conditions are as described below. Adhesive strength was evaluated in two modes, the case where the pulling speed and the peeling speed were set to 150 mm / min, and the case where the pulling speed and the peeling speed were set to 1200 mm / min.

[0287] ·Ten...

Synthetic example 1

[0301] In a glass flask equipped with a stirring device, a thermometer, a cooling pipe, and a dropping device, 30 g of a block copolymer of ethylene oxide and propylene oxide represented by the following formula (1-1-1), and 2.8 g of acrylic acid 64 g of toluene as a solvent, 0.03 g of phenothiazine as a polymerization inhibitor, and 0.6 g of methanesulfonic acid as a catalyst were stirred under air flow, heated to 120° C., and refluxed for dehydration. After confirming dehydration of 0.63 g, it cooled to 65 degreeC and neutralized with triethylamine. After neutralization, the temperature was raised to 85° C., 2.3 g of ion-exchanged water was added, the liquid was separated, and the lower layer was extracted. The pH of the lower layer was measured, and the washing operation was repeated until the pH became 7 or higher. After cooling, it diluted with toluene, and obtained the toluene solution containing 55 mass % of the mixture (1-1) of 3 types represented by following formula...

Synthetic example 2

[0306] 300.00 g of toluene was added to the glass flask, and the temperature was raised to 105°C while stirring in a nitrogen stream. Then, the following dropping solution was installed on the dropping device: 42.90 g of 2-(perfluorohexyl) ethyl acrylate, 194.73 g of mixture (1-1), 129.05 g of toluene, initiator PERBUTYL O (manufactured by NOF Corporation) ) 11.25 g of the dripping solution was mixed, and the dropping solution was dripped over 4 hours while maintaining the inside of the flask at 105°C. After completion of the dropwise addition, the mixture was stirred at 105° C. for 10 hours. After completion of the reaction, the solvent was distilled off to obtain a polyoxyethylene compound (2).

[0307] When the polyoxyethylene compound (2) which is a copolymer was analyzed by GPC, the weight average molecular weight Mw was 12700.

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Abstract

Provided is an adhesive composition with which it is possible to regulate the adhesion of the adhesive, and which has minimal glue residue after peeling. Specifically, an adhesive composition comprising: a polyoxyethylene compound (A) having a polyoxyethylene chain (a2), and one or more selected from a C1-6 fluorinated alkyl group (a1) and a silicone chain (a3); and an adhesive (B).

Description

technical field [0001] The present invention relates to a laminated film which can be suitably used as a surface protection film for protecting the surface of an adherend for a predetermined period, and an adhesive composition for forming an adhesive layer of the laminated film. Background technique [0002] In the field of electronics industry, during the manufacture, transportation, and use of electronic equipment and electronic components, adhesive protective films are attached to the surfaces of electronic equipment and electronic components to protect the surface. [0003] For the same reason, the surface of optical members such as polarizing plates, retardation plates, optical compensation films, transparent conductive films, etc. attach. [0004] The adhesive used for the above-mentioned protective film requires both micro-adhesiveness that can be peeled off with a small force and re-peelability that can be peeled off again beautifully even after one-time attachment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/08C09J133/00C09J175/04C09J201/00C09J7/38
CPCC09J201/00C09J11/08C09J7/38C09J175/04C09J133/00C09J133/04C09J2301/312
Inventor 野口润高野启
Owner DIC CORP
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