Heat-conductive lubricating grease, adhesive, elastic composition, and cooling device

A thermally conductive, lubricating grease technology, used in the field of cooling devices, adhesives or elastomeric compositions, can solve problems such as machine misoperation, component temperature rise, etc.

Inactive Publication Date: 2007-03-14
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the heat of the parts inserted into the machine is large or the cooling performance deteriorates, the temperature of the parts rises, which becomes the cause of malfunction, stoppage of work, or failure of the machine

Method used

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  • Heat-conductive lubricating grease, adhesive, elastic composition, and cooling device
  • Heat-conductive lubricating grease, adhesive, elastic composition, and cooling device
  • Heat-conductive lubricating grease, adhesive, elastic composition, and cooling device

Examples

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preparation example Construction

[0031] In the production method of this thermally conductive grease, etc., a base oil (resin), a surfactant, and a predetermined amount of mixed powder obtained by combining coarse and fine particles of thermally conductive inorganic powder are added, and the mixture is mixed with a mixer (such as a mixing mixer, A three-roll mill, a planetary mixer, a mixer (trimix, a double mixer) was used for kneading. Regarding the kneading conditions, it is necessary to examine the optimum conditions after confirming the hardness of the grease and the like and the pulverization of the particles.

[0032] The thermally conductive grease and the like of the present embodiment produced by the method described above can be used in the same applications as the conventional thermally conductive grease and the like.

[0033] The thermally conductive grease and the like according to the present embodiment are suitable for use on contact surfaces between heating elements and cooling elements of el...

Embodiment 1～15

[0044] Table 1 and FIG. 1 show Examples 1-15. Using 3 kinds (ZnO, Al 2 o 3 , AlN) inorganic powder, four kinds of coarse powder monomers from different types of shapes (polyhedral shape, crushed shape, spherical shape), by changing the average particle size of the inorganic powder from 0.5 to 14 μm, the filling rate of the inorganic powder is 40vol%, Nonionic surfactant (decaglycerol pentaisostearate) 2.0wt%, base oil 60vol%, thereby preparing grease, and evaluating thermal conductivity.

[0045] The measurement results are shown in Table 1 and Fig. 1 . Also, the upward arrows in the table have the same meaning as above. As shown by the measurement results, increasing the average particle size of any powder can increase the thermal conductivity of grease, and further increasing the particle shape into a polyhedral shape (polygon) can greatly increase the thermal conductivity of grease.

[0046]

Embodiment 16～22

[0048] Table 2 and Fig. 2 show Examples 16-22. As the inorganic powder, zinc oxide with a multifaceted shape is used. With respect to 70% by volume of the mixed powder (the mixed powder is composed of 40% to 100% of coarse particles with an average particle diameter of 12.7 μm and 0 to 60% of fine particles with an average particle diameter of 0.6 μm Combination), mixed 2.0wt% nonionic surfactant (decaglycerol pentaisostearate), and 30 volume% base oil to prepare grease, and evaluated thermal conductivity and consistency.

[0049] The measurement results are shown in Table 2 and Fig. 2, and the content of the coarse powder greatly controls the thermal conductivity of the grease. A high thermal conductivity can be obtained if the coarse particle content is made to be about 70 wt%.

[0050]

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Abstract

In the thermally conductive grease of the present invention, etc., the particles of the inorganic powder have a polyhedral shape, and 0.2 to 2.0 wt% of a nonionic surfactant is added with respect to 40 to 90 volume % of the mixed powder, and 10 to 90 wt % of the nonionic surfactant is mixed. 60% by volume of base oil (resin), the mixed powder is composed of 40-90% coarse particles with an average particle diameter of 5-17 μm and 10-60% with an average particle diameter of 1/3-1/3 of the coarse particles Composed of 40 particles.

Description

technical field [0001] The present invention relates to the technology of a thermally conductive material or a contact material used between a heat generating part and a cooling part. In particular, it relates to a heat-conductive grease mainly composed of a base oil and a heat-conductive inorganic powder, an adhesive or an elastomer composition mainly composed of a resin and a heat-conductive inorganic powder, suitable for improving the heat dissipation of parts of electric and electronic equipment, etc. , and technologies such as cooling devices made of them. Background technique [0002] When the heat of the components inserted into the machine is large or the cooling performance deteriorates, the temperature of the components rises, which causes malfunctions, stoppages of operations, or malfunctions of the machines. And, in recent years, this tendency has become stronger. [0003] Conventionally, in order to dissipate heat from such machines and components, thermally c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/10C10M101/00C10M107/02C10M145/00C10M155/02C10N30/00
Inventor 安田明弘出居昭男
Owner HITACHI LTD
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