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Filler-containing pressure-sensitive adhesive tape and method of producing filler-containing pressure-sensitive adhesive tape

A pressure-sensitive adhesive and pressure-sensitive adhesive layer technology, which is used in the manufacture of filler-containing pressure-sensitive adhesive tapes and filler-containing pressure-sensitive adhesive tapes, can solve uneven heat spread, reduce pressure-sensitive adhesive Mixture layer, difficulties and other problems, to achieve excellent pressure-sensitive adhesive force, the effect of inhibiting the generation of volatile components

Active Publication Date: 2018-04-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when a polymer forming a pressure-sensitive adhesive layer is polymerized by using a photopolymerization initiator or a thermal polymerization initiator, a problem occurs that applied light is blocked by a filler, so that the light hardly reaches the pressure-sensitive adhesive the interior of the agent layer; or in the case of insufficient dispersion of the filler, heat spreads unevenly in this layer
[0006] Furthermore, it is difficult to secure the pressure-sensitive adhesive force required for the pressure-sensitive adhesive layer while reducing the amount of such volatile components in the pressure-sensitive adhesive layer, and this difficulty is considered to be a problem

Method used

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  • Filler-containing pressure-sensitive adhesive tape and method of producing filler-containing pressure-sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0181] (Manufacture of slurry composition A)

[0182]Liquid monomer mixture (monomer composition) obtained by mixing 84 parts by mass of 2-ethylhexyl acrylate (2EHA) and 16 parts by mass of N-vinyl-2-pyrrolidone (NVP) as monomer components With 0.05 parts by mass of a photopolymerization initiator available under the trade name "IRGACURE 651 (2,2-dimethoxy-1,2-diphenylethan-1-one)" (manufactured by BASF Japan Ltd.) It was blended with 0.05 parts by mass of a photopolymerization initiator available under the trade name "IRGACURE 184 (1-hydroxycyclohexyl phenyl ketone)" (manufactured by BASF Japan Ltd.). After that, the resultant was irradiated with ultraviolet light until its viscosity (Viscometer: manufactured by TOKIMEC, VISCOMETER (model: BH)) became about 6.4 Pa·s. Thus, a syrupy composition A (2EHA / NVP=84 / 16) containing a partial polymer (prepolymer) obtained by polymerizing a part of the monomer components by irradiation was obtained.

[0183] (Manufacture of pressure s...

Embodiment 2

[0191] The pressure-sensitive adhesive tape of Example 2 (thickness of the pressure-sensitive adhesive layer: 50 μm) was produced in the same manner as in Example 1 except that the blending amount of acrylic acid (AA) was changed to 5 parts by mass.

Embodiment 3

[0193] The pressure-sensitive adhesive tape of Example 3 (thickness of the pressure-sensitive adhesive layer: 50 μm) was produced in the same manner as in Example 1 except that the blending amount of acrylic acid (AA) was changed to 10 parts by mass.

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Abstract

Provided is a filler-containing pressure-sensitive adhesive tape having an excellent pressure-sensitive adhesive strength while suppressing the occurrence of a volatile component, and a method of producing the filler-containing pressure-sensitive adhesive tape. The filler-containing pressure-sensitive adhesive tape includes a pressure-sensitive adhesive layer containing a pressure-sensitive adhesive resin containing an acrylic polymer and a filler dispersed in the pressure-sensitive adhesive resin, in which the acrylic polymer contains at least a constituent unit derived from a (meth)acrylic acid alkyl ester having a linear or branched alkyl group having 1 to 20 carbon atoms, a constituent unit derived from a nitrogen-containing monomer, and a constituent unit derived from a carboxyl group-containing monomer, and has a ratio (mass ratio) of the constituent unit derived from the carboxyl group-containing monomer to the constituent unit derived from the nitrogen-containing monomer of from 0.01 to 40.

Description

technical field [0001] The present invention relates to a filler-containing pressure-sensitive adhesive tape and a method for producing the filler-containing pressure-sensitive adhesive tape. Background technique [0002] There is known a filler-containing pressure-sensitive adhesive tape including a pressure-sensitive adhesive layer to which fillers for expressing various functions are added. Filled pressure-sensitive adhesive tapes have been widely used in various technical fields for the following reasons. The adhesive tape is easily processed into a predetermined shape by punching or the like, and is easy to handle. Such a pressure-sensitive adhesive tape is, for example, a conductive pressure-sensitive adhesive tape including a pressure-sensitive adhesive layer added with conductive particles (see, for example, Japanese Patent Application Laid-Open No. 2015-127392). [0003] The pressure-sensitive adhesive layer of the filler-containing pressure-sensitive adhesive tap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/38C09J133/08C09J9/02C08F220/18C08F226/10C08F220/06C08F222/14C08F2/48
CPCC08F2/48C08F220/18C09J7/00C09J9/02C09J139/04C09J139/06C08K9/02C08K3/40C08F220/1808C09J2301/314C09J2301/302C09J2301/408C08F226/10C08F220/06C08F222/102C08F226/06C08K2201/001C09J2203/318C09J2203/322C09J2203/326C08K3/013C09J7/385C09J133/08C09J2301/312C09J2301/416C09J11/04
Inventor 森冈谅平尾昭金田充宏
Owner NITTO DENKO CORP
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