Thermally conductive silicone composition and method for producing same
A manufacturing method and thermal conductivity technology, which is applied in the field of thermal conductive silicone composition, can solve problems such as insufficient effects, and achieve the effects of low slurry viscosity, improved ejection performance and formability
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Examples
Embodiment 1
[0123]
[0124] Use micropowder α-alumina (BET specific surface area (A BET )6.7m 2 / g, average particle size (d 50 ) 0.27μm, X = 24.815 (B-1) 150.0g, decyltrimethoxysilane (molecular weight = 262.5) (C-1) 1.0g as the first surface treatment agent, passed through Wonder Crusher WC-3 (OSAKA CHEMICAL Co., Ltd.) was subjected to dry surface treatment.
[0125]
[0126] Add two-terminal vinyl dimethylsilyl polydimethylsiloxane as a second surface treatment agent to the thermally conductive inorganic filler after the first surface treatment: Viscosity 350mm 2 / s (D-1) 1.5 g, surface-treated with Wonder Crusher WC-3 (manufactured by OSAKA CHEMICAL Co., Ltd.). The double-stage treated inorganic filler was heat-treated at 120° C. for 12 hours to obtain a double-stage surface-treated thermally conductive filler.
[0127]
[0128] Using the thermally conductive filler adjusted as described above, the composition shown in Table 1 was mixed using a rotary revolution mixer (MAZERU...
Embodiment 2～5、 comparative example 1～5
[0130] Except having set to the composition shown in Table 1, it implemented similarly to Example 1. The conditions and results are summarized in Table 1. The mass of each filler was set as the mass (g) in terms of charging when the matrix resin was set to 100 g.
[0131] Table 1
[0132]
[0133] Can confirm by above result, if embodiment 1 and comparative example 1, embodiment 2 and comparative example 2, embodiment 3 and comparative example 3, embodiment 4 and comparative example 4, embodiment 5 and comparative example 5 carry out respectively In comparison, the shear viscosity of the thermally conductive compound of the composition of each Example was low, and it was possible to improve ejection property and molding processability by this. This is considered to be an advantage based on the combination of the first surface treatment and the second surface treatment.
[0134]
Embodiment 6
[0136] As the matrix resin component (A), a two-component heat-curable silicone polymer was used. A component (A-3a) to which a base polymer component and a platinum-based metal catalyst were previously added, and a component (A-3b) to which a base polymer component and a crosslinking component were previously added were used. The thermally conductive inorganic filler was subjected to the first surface treatment and the second surface treatment in the same manner as in Example 1. The components and addition amounts are described in Table 2. The shear viscosities at 23° C. of the compound after mixing were 1780 Pa·s and 1700 Pa·s. This composite was sandwiched between polyester (PET) films, and a sample rolled to a thickness of 2.0 mm was held at 100° C. for 15 minutes to heat-cure it. Table 2 shows the hardness (Asker-C) and thermal conductivity of the obtained thermally conductive silicone sheet.
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Abstract
Description
Claims
Application Information
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