Emulsion-type pressure-sensitive adhesive composition and re-peelable pressure-sensitive adhesive sheet

A re-peelable, adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., can solve problems such as residual glue

Active Publication Date: 2016-03-30
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this adhesive sheet also reduces the cohesive force in order to improve the adhesive force of the adhesive layer relative to the rough surface, and has the problem of residual glue

Method used

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  • Emulsion-type pressure-sensitive adhesive composition and re-peelable pressure-sensitive adhesive sheet
  • Emulsion-type pressure-sensitive adhesive composition and re-peelable pressure-sensitive adhesive sheet
  • Emulsion-type pressure-sensitive adhesive composition and re-peelable pressure-sensitive adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0136] The present invention is described in more detail through examples below. However, the present invention is not limited in any way by the following examples.

[0137] Reagents used in Examples and Comparative Examples are as follows.

[0138] 2-Ethylhexyl acrylate: manufactured by Mitsubishi Chemical Corporation (indicated as "2EHA" in Table 1)

[0139] - Butyl acrylate: manufactured by Mitsubishi Chemical Corporation (indicated as "BA" in Table 1)

[0140] Acrylic acid: manufactured by Mitsubishi Chemical Corporation (indicated by "AA" in Table 1)

[0141] · Methyl acrylate: manufactured by Mitsubishi Chemical Corporation (indicated as "MA" in Table 1)

[0142] ・Pentaerythritol triacrylate: manufactured by Daicel-Cytec Co., Ltd., trade name "PETIA"

[0143] ・Anionic surfactant: manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., brand name "NewFrontierA-229E"

[0144] · Tackifying resin (B)-1: manufactured by Harima Chemicals Group, Inc., brand name "Hariester...

preparation example 1~5

[0150] The monomers were mixed according to the parts by mass recorded in Table 1 to prepare a monofunctional monomer mixture.

[0151] [Table 1]

[0152] Table 1

[0153]

[0154] The numerical values ​​in the table represent parts by mass.

Embodiment 1

[0156] To 99.7 parts by mass of the monofunctional monomer mixture obtained in Preparation Example 1, 0.3 parts by mass of pentaerythritol triacrylate and 3 parts by mass of tackifier resin (C) were added and mixed. The obtained mixture was charged into a reaction vessel equipped with a stirrer, a thermometer, a reflux cooler, and a dropping funnel, and stirred for 30 minutes while maintaining the temperature at about 30° C. to dissolve.

[0157] Next, a liquid phase dispersion obtained by dispersing 0.6 parts by mass of anionic surfactant in 57 parts by mass of ion-exchanged water was added at about 30°C, and the entire contents were stirred for 30 minutes to prepare an emulsified mixture containing a monomer mixture and the like. things.

[0158] On the other hand, drop 40 parts by mass of deionized water into a reaction vessel equipped with a stirrer, a reflux cooler, a thermometer, a nitrogen introduction pipe, and a dropping funnel, and while feeding nitrogen, the tempera...

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Abstract

The present invention is an emulsion-type PSA composition containing an acrylic copolymer (A) and a rosin, and a re-peelable PSA sheet using the same. Tackifying resin (B), acrylic copolymer (A) is a mixture of monofunctional monomers and polyfunctional monomers containing 2-ethylhexyl acrylate, methyl acrylate and ethylenically unsaturated carboxylic acid The whole monomer mixture, so that the content of 2-ethylhexyl acrylate is 70~97% by mass, the content of methyl acrylate is 1~15% by mass and the content of ethylenically unsaturated carboxylic acid is 0.1~15% by mass It is obtained by emulsion polymerization of a monofunctional monomer mixture and a multifunctional monomer, wherein, with respect to 100 parts by mass of the entire monomer mixture, the addition amount of the rosin-based tackifying resin (B) is 1 to 9 parts by mass.

Description

technical field [0001] The present invention relates to an emulsion-type PSA composition suitable for use in producing tire identification labels and the like, and a re-peelable PSA sheet using the PSA composition. Background technique [0002] Product identification labels are attached to products, etc. to convey product names or other information. Conventionally, as such product identification labels, PSA sheets having an PSA layer or the like on a base have been widely used. [0003] Such a pressure-sensitive adhesive sheet is required to have a high adhesive force at the time of commercial distribution, but it can be peeled off relatively easily in the end without producing adhesive residue. [0004] Therefore, in the PSA sheet required to have these characteristics, various studies have been conducted on adhesives, adhesives, and the like constituting the PSA sheet. [0005] For example, Patent Document 1 discloses a pressure-sensitive adhesive composition comprising ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C09J133/00C09J7/02C09J11/06
CPCC08F222/103C09J7/385C09J133/08C09J7/22C09J7/30C09J7/35C09J7/401C09J11/06C09J133/00C09J2203/334C09J2301/30
Inventor山岸正宪池田文德
OwnerLINTEC CORP