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Adhesive composition

A technology of adhesives and adhesive layers, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of high adhesive strength and damage of the adherend, and achieve an excellent balance effect

Inactive Publication Date: 2011-10-26
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an adhesive tape utilizing such a pressure-sensitive adhesive has problems such as occurrence of insufficient cohesive strength of the pressure-sensitive adhesive when the adhesive tape is separated and removed from the adherend. The resulting transfer of the adhesive to the adherend, or the adherend is damaged due to high adhesive strength

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0120] The present invention will be described below by referring to Examples, however, the present invention is by no means limited to these Examples.

[0121] The abbreviations used to illustrate the starting materials used in the following Preparation Examples are shown below.

[0122] EA: ethyl acrylate

[0123] BA: butyl acrylate

[0124] IOA: Isooctyl acrylate

[0125] DMAEA: Dimethylaminoethyl Acrylate

[0126] Vim: 1-vinylimidazole

[0127] AA: Acrylic

[0128] StyM: Styrene Macromonomer

[0129] A styrene macromonomer having the following properties and structural formula was prepared according to the method described in Japanese Unexamined Patent Application (Kokai) 59-75975, page 14, upper right column, monomer "C-3".

[0130] (nature)

[0131] 50 wt% solution of methacrylate-terminated polystyrene / cyclohexane

[0132] Weight average molecular weight = 13,000 (by GPC)

[0133] (structural formula)

[0134] CH 2 =C(CH 3 )C(=O)-O-CH 2 CH 2 -Polystyrene-C...

preparation Embodiment 1

[0163] Preparation of Acrylic Copolymer

[0164] As shown in Table 1 below, 81 parts of ethyl acrylate, 12 parts of butyl acrylate, 5 parts of 1-vinylimidazole, 2 parts of acrylic acid and 233.3 parts of ethyl acetate were added to a pressure glass bottle. Subsequently, 0.2 parts of 2,2'-azobis(2,4-dimethylvaleronitrile) was added as a polymerization initiator, and nitrogen gas was introduced for 10 minutes from an inert gas inlet tube fixed to the glass bottle, thereby using Nitrogen flushing system. Immediately after nitrogen flushing, the glass bottle was sealed with a cap, and polymerization was performed in a constant temperature water bath at 50° C. for 20 hours. The intrinsic viscosity of the acrylic copolymer was measured from the obtained acrylic copolymer solution and found to be 1.19 dl / g.

preparation Embodiment 2

[0166] Preparation of Acrylic Copolymer:

[0167] The procedure of Preparative Example 1 was repeated, but in this example, the starting materials were changed as indicated in Table 1. The intrinsic viscosity of the acrylic copolymer was measured from the obtained acrylic copolymer solution and found to be 1.42 dl / g.

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Abstract

To provide a pressure-sensitive adhesive composition for a removable pressure-sensitive adhesive tape which can be, after attaching to an adherend, easily removed from the adherend by stretching the pressure-sensitive adhesive tape and does not cause adhesive transfer on the adherend or damage of the adherend. A pressure-sensitive adhesive composition comprises a cohesive component comprising a styrene-based block copolymer, and a basic component.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition and a pressure-sensitive adhesive tape. More specifically, the present invention relates to a tape that can be easily removed from an adherend by stretching said pressure sensitive adhesive tape after being adhered to said adherend and does not cause transfer of the adhesive to the adherend The removable pressure-sensitive adhesive tape of the invention also relates to a pressure-sensitive adhesive composition suitable for the above-mentioned pressure-sensitive adhesive tape. In addition, the present invention relates to an adhesive structure equipped with the pressure-sensitive adhesive tape of the present invention. Background technique [0002] Hitherto, various types of so-called pressure-sensitive adhesive tapes, such as pressure-sensitive adhesive films and pressure-sensitive adhesive labels, have been proposed and put into practice for various purposes. For example, as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/02C09J133/06B32B27/12C09J151/00
CPCC09J151/00C09J151/003C09J153/02C08L2666/02C08L2666/04C08L2666/24Y10T428/2852Y10T428/264Y10T428/28Y10T428/265Y10T428/2883Y10T428/2878Y10T428/2887Y10T428/1452Y10T428/31855C09J7/381C09J7/383
Inventor 樱井爱三水野英二
Owner 3M INNOVATIVE PROPERTIES CO
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