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Adhesive and pressure-sensitive adhesive band using the adhesive

A technology of adhesives and adhesive tapes, applied in the direction of film/sheet adhesives, adhesives, adhesive additives, etc., can solve the problems of penetration at the attached place, and achieve effective bonding

Inactive Publication Date: 2005-06-08
TOMBOW PENCIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the paper is pasted, the colored adhesive can be confirmed, but there will be a problem that the color of the pasted part will show through.

Method used

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  • Adhesive and pressure-sensitive adhesive band using the adhesive
  • Adhesive and pressure-sensitive adhesive band using the adhesive
  • Adhesive and pressure-sensitive adhesive band using the adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] By heating 10 parts by weight of crystal violet lactone (manufactured by Tokyo Chemical Industry Co., Ltd.) as a leuco dye, and 4 parts by weight of TG-SA (manufactured by Nippon Kayaku Co., Ltd.) as a developer Dissolve and stir, the color turns blue, and after cooling, it is pulverized to obtain colorant A.

[0045] Disperse the microcapsules coated with the decolorizing material dimethylaminopyridine, which can decolorize the color material A, and the isopropylnaphthalene obtained by the coacervation method, in an appropriate amount on the acrylic adhesive agent, and applied to the release-treated substrate to obtain a pressure-sensitive transfer adhesive tape.

[0046] A pressure of 1500 kPa was applied to the tape portion to transfer it to paper, and since it had a recognizable blue color at this point in time, it was possible to distinguish where it was transferred.

[0047] After one day of reposting, the blue color of the reposting position will disappear, maki...

Embodiment 2

[0049] Dissolve by heating 10 parts by weight of Blue-63 (manufactured by Yamamoto Chemical Industry Co., Ltd.) as a leuco dye, and 3.5 parts by weight of TG-SA (manufactured by Nippon Kayaku Co., Ltd.) as a color developer. After stirring, the color turns blue, and after cooling, it is pulverized to obtain colorant B.

[0050] In an acrylic-based adhesive with toluene and ethyl acetate as the main solvent, an appropriate amount of the colorant B and dimethylaminopyridine is contained, and it is coated on a substrate that has been peeled off, and the solvent is dried to obtain Blue adhesive layer X. Next, using the coacervation method, microcapsules coated with isopropylnaphthalene can be obtained, and the microcapsules can be dispersed in an appropriate amount of acrylic adhesive and stacked on the adhesive layer X to obtain pressure-sensitive Transfer adhesive tape.

[0051] A pressure of 1500 kPa was applied to the tape portion to transfer it to paper. At this point in ti...

Embodiment 3

[0054] By dissolving 10 parts by weight of crystal violet lactone (manufactured by Tokyo Chemical Industry Co., Ltd.) as a leuco dye, and 3.5 parts by weight of TG-SA (manufactured by Nippon Kayaku Co., Ltd.) as a developer Colorant liquid C was obtained in a mixed solvent of 10 parts by weight of Solmix AP-1 (manufactured by Nippon Alcohol Sales Co., Ltd.) and 15 parts by weight of toluene.

[0055] And by the interfacial polymerization method, the microcapsules coated with the decolorizing material castor oil can be obtained.

[0056] Then, 5 parts by weight of the microcapsules coated with castor oil were added to 50 parts by weight of the colorant liquid C, heated to 50° C. and stirred. After five minutes, the microcapsules are separated from the colorant solution C to obtain microcapsules whose walls are colored with the colorant composed of the leuco dye crystal violet lactone and the color developer TG-SA.

[0057] A suitable amount of colored microcapsules is disperse...

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PUM

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Abstract

The present invention provides an adhesive and a pressure-sensitive transfer adhesive tape coated with the adhesive, which is colored when applied to an adherend, and the color disappears after a period of time. The adhesive of the present invention, and the pressure-sensitive transfer adhesive tape produced by coating the adhesive on a base material, the adhesive contains: a colorant that reacts a color developer with a leuco dye to produce a color, an action A substance having a decolorizing effect (decolorizing material) on it, and a microcapsule coated with a substance acting on at least one of them to make the two react.

Description

technical field [0001] The present invention relates to an adhesive and a pressure-sensitive transfer adhesive tape for applying the adhesive to a substrate, in particular to such an adhesive and a pressure-sensitive transfer adhesive tape, when the adhesive is transferred to an adhered The body is colored, and when pressure is applied as an external stimulus, the color will disappear with the passage of time. Background technique [0002] Among the double-sided adhesive tapes, there is a supportless (core material) double-sided adhesive tape that does not have a support (core material) but only transfers the adhesive layer to the adhered material. Transfer adhesive tapes are used in various fields and applications. As such a structure, an adhesive layer is often provided on one side of a release liner or a release base material, and it is rolled into a roll. Recently, it is rolled into a small tube and installed in a transfer device mainly for business purposes. The repos...

Claims

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Application Information

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IPC IPC(8): B05D7/24C09J7/02C09J11/06C09J11/08C09J201/00
CPCC09J7/20C09J11/06C09J11/08C09J2301/208
Inventor 酒井直人
Owner TOMBOW PENCIL CO LTD
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