Flame-retardant thermally-conductive adhesive sheet

A heat-conductive and flame-retardant technology, applied in the field of flame-retardant heat-conductive adhesive sheets, can solve the problems of the adhesive layer becoming hard and adhesive properties, decline, loss of fluidity of the adhesive composition, etc. Excellent strength, high flame retardancy, and excellent thermal conductivity

Active Publication Date: 2013-10-09
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Document 3 describes an example in which aluminum hydroxide is used as a flame retardant and aluminum oxide is used as a thermally conductive filler, and it is described that sufficient thermal conductivity can be obtained even with a small filling amount by specifying the particle size. and flame retardancy, but it does not satisfy thermal conductivity and flame retardancy at the same time
[0006] As disclosed in the above-mentioned Patent Documents 1 to 3, in order to satisfy thermal conductivity and flame retardancy, it is conceivable to mix a large amount of thermally conductive particles and a flame retardant, but there is still a problem due to the loss of the flow of the adhesive composition (viscous liquid). The adjustment of the pressure-sensitive adhesive sheet is difficult due to the lack of stability, and the adhesive layer becomes hard and the adhesive performance decreases.

Method used

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  • Flame-retardant thermally-conductive adhesive sheet
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  • Flame-retardant thermally-conductive adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] 82 parts by weight of 2-ethylhexyl acrylate and 12 parts by weight of 2-methoxyethyl acrylate as monomer components, N-vinyl-2-pyrrolidone (NVP) as a polar group-containing monomer 5 parts by weight and 1 part by weight of hydroxyethylacrylamide (HEAA) were mixed with 0.05 parts by weight of the product name "IRGACURE651" (manufactured by Ciba Japan Co., Ltd.) as a photopolymerization initiator and the product name "IRGACURE184" (manufactured by Ciba Japan Co., Ltd.) 0.05 parts by weight, and then irradiated with ultraviolet light until the viscosity (BH viscometer No. 5 rotor, 10 rpm, measurement temperature 30°C) reached about 20 Pa·s, and prepared a partially polymerized combination matter (slurry).

[0150] 0.05 parts by weight of dipentaerythritol hexaacrylate as a polyfunctional monomer, trade name "KAYARAD DPHA-40H" (manufactured by Nippon Kayaku Co., Ltd.), and trade name "Plysurf A212E" ( Daiichi Kogyo Pharmaceutical Co., Ltd.) 1 part by weight. Furthermore, ...

Embodiment 2

[0153] In Example 1, 82 parts by weight of 2-ethylhexyl acrylate and 12 parts by weight of 2-methoxyethyl acrylate as monomer components, N-vinyl-2 - Change 5 parts by weight of pyrrolidone (NVP) and 1 part by weight of hydroxyethylacrylamide (HEAA) to 80 parts by weight of 2-ethylhexyl acrylate and 12 parts by weight of 2-methoxyethyl acrylate, as polar group-containing In addition to 7 parts by weight of N-vinyl-2-pyrrolidone (NVP) and 1 part by weight of hydroxyethylacrylamide (HEAA), the same recipe as in Example 1 was used to produce flame-retardant thermal conductivity adhesive sheet. The glass transition temperature of the acrylic polymer is -61.1°C.

Embodiment 3

[0155] In Example 1, 82 parts by weight of 2-ethylhexyl acrylate and 12 parts by weight of 2-methoxyethyl acrylate as monomer components, N-vinyl-2 - Change 5 parts by weight of pyrrolidone (NVP) and 1 part by weight of hydroxyethylacrylamide (HEAA) to 77 parts by weight of 2-ethylhexyl acrylate and 11 parts by weight of 2-methoxyethyl acrylate, as polar group-containing In addition to 11 parts by weight of N-vinyl-2-pyrrolidone (NVP) and 1 part by weight of hydroxyethylacrylamide (HEAA), a flame-retardant heat-conducting Adhesive tablets. The glass transition temperature of the acrylic polymer was -58.0°C.

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Abstract

A flame-retardant thermally-conductive pressure-sensitive adhesive sheet includes a flame-retardant thermally-conductive pressure-sensitive adhesive layer containing at least: (a) an acrylic polymer prepared by copolymerizing a monomer component containing an alkyl (meth)acrylate as a main component, containing a polar group-containing monomer, and not substantially containing a carboxyl group-containing monomer and (b) a hydrated metal compound.

Description

technical field [0001] The present invention relates to a flame-retardant thermally conductive pressure-sensitive adhesive sheet having both flame retardancy and thermal conductivity. Background technique [0002] Conventionally, by containing a thermally conductive filler in an acrylic pressure-sensitive adhesive composition, the heat conductivity has been further improved compared with the base pressure-sensitive adhesive. For example, Patent Document 1 discloses that high adhesive force (adhesive force) can be imparted to a thermally conductive pressure-sensitive adhesive sheet by using boron nitride particles having a specific particle diameter and an acrylic polymer component. [0003] In addition, thermally conductive adhesive sheets are widely used in electronic component applications such as sealing of chip components, formation of an insulating layer between a circuit on which a heat generating component is mounted, and a heat sink, and the like. For the thermally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J7/02C09J11/04C09J133/04C09J7/10
CPCC08K3/22C08K3/0058C09J7/0217C09J133/04C09J2205/102C08K3/016C09J7/385Y10T428/2891C09J7/10C09J2433/00C09J2301/408C09J7/22C09J7/30C08L33/04C09J11/04C09J2301/314
Inventor 东城翠仲山雄介寺田好夫古田宪司
Owner NITTO DENKO CORP
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