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Photocurable acrylic thermo-conducting composition, acrylic thermoconductive sheet, and method for manufacturing same

A photocurable, thermally conductive technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of poor thermal conductivity, poor heat resistance, loss of flexibility of thermally conductive sheets, etc. Degradation, the effect of preventing oxidative degradation

Active Publication Date: 2015-12-30
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] On the other hand, in the case of an acrylic thermally conductive sheet using an acrylic compound, which is more advantageous in material cost than silicone compounds, as the main curing component of the photocurable adhesive composition, because of course no Low-molecular-weight siloxane gas is released, so the occurrence of contact failures is suppressed. However, compared with silicone-based thermally conductive sheets, there are the following problems: heat resistance is poor, and acrylic resin after photocuring is damaged by active oxygen. The generated peroxy radicals and hydroperoxides are oxidatively degraded, and then lose the flexibility of the thermally conductive sheet, and its thermal conductivity properties will deteriorate.

Method used

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  • Photocurable acrylic thermo-conducting composition, acrylic thermoconductive sheet, and method for manufacturing same
  • Photocurable acrylic thermo-conducting composition, acrylic thermoconductive sheet, and method for manufacturing same

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preparation example Construction

[0053] (Preparation of Photocurable Acrylic Heat Conductive Composition)

[0054] The photocurable acrylic heat-conductive composition can be prepared by the following method: use a common method, such as a satellite-type stirring device (Thinky Company), to mix (meth)acrylate monomer, heat-conductive filler, optical A radical polymerization initiator, a primary antioxidant, a secondary antioxidant, an anti-thermal degradation agent, and other additives blended as necessary are uniformly mixed.

[0055]

[0056] The photocurable acrylic heat-conductive composition of the present invention can be used as an acrylic heat-conductive sheet by forming a sheet-shaped photocured product. That is, an acrylic thermally conductive sheet can be produced by molding a photocurable acrylic thermally conductive composition containing a thermally conductive filler into a sheet and irradiating it with ultraviolet rays to perform photopolymerization. Specifically, first, the above-described ...

Embodiment 1~2

[0060] Embodiment 1~2, comparative example 1~5

[0061] A photocurable acrylic heat-conductive composition was prepared by uniformly mixing the ingredients listed in Table 1 with a satellite stirrer (Thinky Corporation). Next, this photocurable acrylic heat-conductive composition was molded into a sheet having a thickness of 1000 μm using a bar coater. For the sheet, the ultraviolet light with the maximum intensity at the wavelength of 300~400nm was used to 2 The irradiation intensity was irradiated simultaneously on both sides of the sheet for 5 minutes, respectively, and photopolymerized and cured, thereby producing an acrylic thermally conductive sheet.

[0062]

[0063] The degree of loss of flexibility of the obtained acrylic thermally conductive sheet due to thermal degradation caused by heat and oxygen was evaluated by measuring the compression retention rate after aging treatment at 125°C or 150°C for 100 hours . Furthermore, the degree of coloring after the aging...

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Abstract

A photocurable acrylic thermo-conducting composition suitable for an acrylic thermoconductive sheet contains: a (meth)acrylic acid ester monomer; 300 to 2000 parts by mass of a thermoconductive filler with respect to 100 parts by mass of the (meth)acrylic acid ester monomer; 0.5 to 7.0 parts by mass of a photo-radical polymerization initiator; 0.5 to 4.0 parts by mass of a primary oxidation inhibitor; 0.5 to 8.0 parts by mass of a secondary oxidation inhibitor; and 0.1 to 4.0 parts by mass of a heat degradation inhibitor.

Description

technical field [0001] The present invention relates to a photocurable acrylic heat-conductive composition, an acrylic heat-conductive sheet obtained therefrom, and a method for producing the same. Background technique [0002] Thermally conductive sheets are widely used in order to closely adhere electronic components such as IC chips that generate heat during driving to heat radiating members such as heat sinks. As such a thermally conductive sheet, a photocurable sheet containing a photocurable compound such as a photocurable silicone compound or an acrylic compound and a photopolymerization initiator dispersed in a thermally conductive filler such as alumina fine particles is used. Among the pressure-sensitive adhesive compositions, the obtained photocurable thermally conductive composition is sheeted and photocured (Patent Documents 1 and 2). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2004-090516 ...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08F2/50
CPCC08F2/44C08F2/48C08K3/22C08F220/20C08K5/134C08K5/13C08K5/49C08K2003/2227C09K5/14C08F222/102C08F220/1808C08L33/04C08F220/1812C08K5/005C08K9/02
Inventor 松岛昌幸
Owner DEXERIALS CORP