Heat-conductive elastomer composition and heat-conductive molded article
An elastomer and heat conduction technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of reduced heat dissipation efficiency, achieve the effects of inhibiting oil leakage and excellent formability
Active Publication Date: 2020-08-07
KITAGAWA INDS
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- Description
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Problems solved by technology
[0004] When there is a gap between the heat-conducting molded body and the heat-generating component, or between the heat-conducting molded body and the radiator, the heat dissipation efficiency is reduced, so for the heat-conducting molded body, It needs to be properly attached to various heat-generating components of different installation heights and sizes
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～8 and comparative example 1～8
[0096] (making of composition)
[0097] With respect to 100 mass parts of styrene-based elastomers, process oil, release agent, heavy metal deactivator, antioxidant, aluminum hydroxide and graphite are blended in the ratio (mass parts) shown in Table 1 and Table 2, using LABO PLASTOMILL (twin-screw extruder, product name "4C150-1", manufactured by Toyo Seiki Seisakusho Co., Ltd.) kneaded their mixture for 7 minutes at 100 rpm and 200° C. to obtain Examples 1 to 8 of each composition. Each composition was taken out from LABOPLASTOMILL after standing to 100 degreeC or less, and used in the following process (production of a molded object) mentioned later.
[0098] In addition, each component (material) used in each Example is as follows.
[0099] "Styrenic elastomer": SEEPS (hydrogenated styrene / isoprene / butadiene / block copolymer), trade name "Septon 4055", manufactured by Kuraray Corporation.
[0100] "Processing oil": Petroleum-based hydrocarbon, trade name "Diana Processin...
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Abstract
Provided are a heat-conductive elastomer composition, which has a high heat conductivity, excellent insulation properties, low hardness, excellent moldability, etc. and hardly causes oil bleeding, etc. The heat-conductive elastomer composition according to the present invention comprises 100 parts by mass of a styrene-based elastomer, 400-540 parts by mass of a process oil comprising a petroleum hydrocarbon, 950-1350 parts by mass of aluminum hydroxide having an average particle diameter of 3-20 [mu]m and 70-80 parts by mass of expanded graphite having an average particle diameter of 3-20 [mu]m, wherein the difference between the average particle diameter of the aluminum hydroxide and the average particle diameter of the expanded graphite is within 5 [mu]m.
Description
technical field [0001] The present invention relates to a thermally conductive elastomer composition and a thermally conductive molded body. Background technique [0002] In substrates for electrical / electronic equipment on which heat-generating electric / electronic components such as power transistors and ICs (Integrated Circuits) are mounted (hereinafter, heat-generating components), for the purpose of weight reduction and miniaturization, etc., High-density mounting of heat-generating components, etc. Therefore, in recent years, the amount of heat generated by such substrates has increased. [0003] Conventionally, heat-proof measures for such heat-generating components and substrates on which the heat-generating components are mounted, for example, as shown in Patent Document 1, utilize heat conduction molding using a styrene-based elastomer as the base polymer and containing heat-conducting fillers. body. Such a thermally conductive molded body is used, for example, t...
Claims
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IPC IPC(8): C08L53/02C08K3/013C08K3/016C08K3/04C08K3/22C08L91/00
CPCC08K3/013C08K3/016C08K3/04C08K3/22C08L53/02C08L91/00C09K5/14C08L2207/322
Inventor 内田达也馆直宏
Owner KITAGAWA INDS