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Silicone composition and lubricating grease

A technology of silicone composition and polysiloxane, applied in lubricating compositions, heat exchange materials, petroleum industry, etc., can solve problems such as resistance to scratches that are not mentioned

Active Publication Date: 2014-05-07
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermally conductive silicone compositions described in Patent Document 1 to Patent Document 5 all focus on improving heat dissipation performance, oil separation measures, pump out resistance, etc., and do not mention scratch resistance.

Method used

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  • Silicone composition and lubricating grease
  • Silicone composition and lubricating grease
  • Silicone composition and lubricating grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] Examples and comparative examples are shown below to describe the present invention in more detail, but the present invention is not limited to the following examples. In the following, the average particle diameter of the powder is a volume-based cumulative average particle diameter measured using a particle size analyzer Microtrac MT3300EX manufactured by Nikkiso Co., Ltd.

[0071] Each component used in an Example and a comparative example is described below.

[0072] (A) Ingredients

[0073] (A-1)

[0074] [Chem 3]

[0075] Dynamic viscosity 5,000mm 2 / s

[0076] (A-2)

[0077] [chemical 4]

[0078] Dynamic viscosity 390mm 2 / s

[0079] (B) Component: thermally conductive filler

[0080] (a) Calcium carbonate powder

[0081] (a-1) Average particle size 1.0 μm

[0082] (a-2) Average particle size 20.5μm

Embodiment 1～ Embodiment 6 and comparative example 1～ comparative example 7

[0102] Preparation of silicone composition

[0103] According to the formulation amounts shown in Table 1 and Table 2, the ingredients were put into a 5-liter planetary mixer (registered trademark of a mixer manufactured by Inoue Seisakusho Co., Ltd.), and stirred at 150°C for 1 hours to manufacture silicone compositions.

[0104] For each composition obtained by the method described above, the viscosity, thermal conductivity, scratch test, and volume resistance value were measured according to the following methods. The results are shown in Table 1 and Table 2.

[0105] [viscosity]

[0106] The absolute viscosity of each composition was measured at 25 degreeC using the model PC-1TL (10 rpm) manufactured by Macon Co., Ltd.

[0107] [Thermal conductivity]

[0108] The thermal conductivity of each composition was measured at 25° C. using TPA-501 manufactured by Kyoto Denshi Kogyo Co., Ltd.

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Abstract

The invention aims to provide a silicone composition and lubricating grease and provide heat-radiating lubricating grease excellent in insulation property and anti-scratch property. The invention provides a silicone composition and lubricating grease containing the silicon composition. The silicon composition comprises (A) 100 parts by mass of organic polysiloxane with a dynamic viscosity of from 10mm<2> / s to 500,000mm<2> / s below 25 DEG C, and (B) from 100 parts to 1300 parts by mass of thermal conductive filler. The silicon composition is characterized in that the thermal conductive filler comprises (a) from 100 parts to 1000 parts by mass of calcium carbonate powder with an average particle size of from 0.1[mu]m to 100[mu]m, and (b) from 0 part to 1000 parts by mass of aluminium hydroxide powder with an average particle size of from 0.1[mu]m to 100[mu]m.

Description

technical field [0001] The present invention relates to a thermally conductive silicone grease composition excellent in scratch resistance. Background technique [0002] Generally, electric and electronic parts generate heat during use. Therefore, heat removal is required for proper functioning of electrical components, and various thermally conductive materials for heat removal have been proposed. The thermally conductive material is roughly divided into two forms, and a sheet-like material (sheet for heat dissipation) which is easy to handle and a paste-like material (grease for heat dissipation) are known. [0003] The heat dissipation sheet has the advantages of being easy to handle and excellent in thermal stability, but the contact heat resistance becomes large in nature. Therefore, the heat dissipation performance of the grease for heat dissipation is generally high. In addition, the grease for heat dissipation has an advantage that it can also be adapted to mass p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/26C08K3/22C09K5/14C10M169/06C10N40/16
Inventor 山田邦弘
Owner SHIN ETSU CHEM IND CO LTD
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