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Insulating tape

A technology of insulating tape and cross-linking agent, applied in polyurea/polyurethane adhesives, epoxy resin adhesives, film/sheet adhesives, etc., can solve problems such as machine performance degradation, and achieve excellent appearance retention Effect

Inactive Publication Date: 2011-04-20
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a case, discoloration of the insulating tape may cause users to think that the performance of the device itself has deteriorated, so discoloration is not preferable from the viewpoint of maintaining the appearance quality of the device.

Method used

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  • Insulating tape

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] When preparing the above-mentioned acrylic polymer, a polymerization initiator such as a thermal polymerization initiator or a photopolymerization initiator (photoinitiator) can be used depending on the type of polymerization reaction. The polymerization initiators may be used alone or in combination of two or more. Generally, a thermal polymerization initiator is often used as a polymerization initiator in a solution polymerization method, and a photopolymerization initiator is often used as a polymerization initiator in an active energy ray polymerization method, but they are not particularly limited.

[0046] As said thermal polymerization initiator, an azo type polymerization initiator, a peroxide type polymerization initiator, a redox type polymerization initiator etc. are mentioned, for example. Examples of the aforementioned azo-based initiator include: 2,2'-azobisisobutyronitrile (hereinafter sometimes referred to as AIBN), 2,2'-azobis-2-methylbutyronitrile (her...

Embodiment

[0079] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. In addition, in the following description and Table 1, the compounding amount (addition amount) of Coronet L is expressed in terms of solid content (parts by weight).

manufacture example

[0081] 100 parts by weight of n-butyl acrylate, 3 parts by weight of acrylic acid and 5 parts by weight of vinyl acetate as monomer components, 0.2 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 250 parts by weight of toluene were put into the separable flask, and stirred for 1 hour while introducing nitrogen gas. In this way, after the oxygen in the polymerization system was removed, the temperature was raised to 80° C. for 7 hours, and then toluene was added to adjust the concentration to obtain an acrylic polymer solution with a solid content concentration of 20% by weight (sometimes referred to as “acrylic polymer solution A”). ). The weight average molecular weight of the acrylic polymer in this acrylic polymer solution A (it may be called "acrylic polymer A") was 500,000.

[0082] Production example of acrylic polymer B

[0083] 100 parts by weight of n-butyl acrylate and 5 parts by weight of acrylic acid as a monomer component, 0.5 p...

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Abstract

An object of the present invention is to provide an insulating tape superior in durability in appearance that is resistant to yellowing even when used under severe environment (for example, under high-temperature and high-humidity condition) or for an extended period of time and also to deterioration in appearance of the device employing the insulating tape. The insulating tape includes a plastic film base and a pressure-sensitive adhesive layer formed on at least one side of the plastic film base, the insulating tape has a b* value after storage in an environment of 85 DEG C and 85%RH for 500 hours of 3.0 or less.

Description

technical field [0001] This invention relates to insulating tape. More specifically, it relates to an adhesive tape for electrical insulation for use in electrical insulation. Background technique [0002] Conventionally, adhesive tapes for electrical insulation (hereinafter simply referred to as "insulation tapes") have been used as simple electrical insulation means in various electric equipment, electronic equipment, and the like. These insulating tapes use a plastic film such as a polyvinyl chloride film or a polyethylene terephthalate film as a base material, and a rubber-based or acrylic adhesive layer is formed on one side of the base material. In recent years, with the diversification of devices using insulating tapes and the increase in the life of devices, the characteristics required for insulating tapes have also become diverse. Specifically, as one of such required characteristics, it is assumed that the equipment using the insulating tape is used under severe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/00C09J11/06C09J7/22C09J7/38
CPCC09J2205/102C08G18/76C09J7/0217C08G18/6254C08G18/6225C09J7/0246C09J163/00C08L33/08C09J175/04C09J7/0285C08F220/18C08L2666/04C09J7/38C09J7/385C09J7/22C09J7/255Y10T428/287Y10T428/2891Y10T428/28C09J2301/408C08F220/1804C08F218/08C08F220/06
Inventor 玉井弘宣渡边博之
Owner NITTO DENKO CORP
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