Low-oil-leakage heat conduction silicone pad and preparation method thereof

Abstract

The invention discloses a low-oil-leakage heat conduction silicone pad. The silicone pad is prepared from the following components in parts by weight: 100 parts of vinyl silicone oil, 1 to 10 parts ofhydrogen containing silicone oil, 0.01 to 0.5 part of an inhibitor, 0.1 to 0.5 part of a catalyst, and 700 to 1200 parts of aluminum oxide. The invention further discloses a method for preparing thelow-oil-leakage heat conduction silicone pad. As proved by an aging test, the heat conduction silicone pad has the advantages of low weight loss ratio, no oil leakage phenomenon, and stable heat conduction performance.

Description

Technical field

[0001] The invention relates to the application of thermal interface materials, in particular to a low oil leakage heat conduction silica gel gasket with low oil leakage rate and stable thermal conductivity and a preparation method thereof.

Background technique

[0002] In the heat dissipation design of thermal interface materials, due to insufficient contact between thermal interfaces, thermal contact resistance is generated, which leads to serious hindrance in heat flow conduction. To solve this problem, a layer of thermal interface material needs to be placed between the heating element and the cooling element. Commonly used heat dissipation materials include ceramics, thermally conductive silicone grease, and thermally conductive silicone gaskets. Among them, ceramics have high thermal conductivity, but are brittle and difficult to fill the tiny gaps between thermal interfaces, so they cannot be used as interface materials. Because thermal conductive ...

Examples

Embodiment 1

[0020] Add 100 grams of vinyl silicone oil, 4 grams of hydrogen-containing silicone oil and 0.01 gram of inhibitor into a stirred tank with a rotating speed of 60 rpm and stir for 30 minutes, then add 700 grams of aluminum oxide to the stirred tank, and stir at a rotating speed of 30 rpm Stir at low temperature for 1 hour, then add 0.2 g of catalyst into the stirred tank, stir at a speed of 60 rpm for 20 minutes, and vacuumize at the same time to obtain a heat-conducting silica gel compound.

[0021] The prepared thermally conductive silicone compound was calendered into a sheet with a thickness of 2mm, cured at 120°C for 10 minutes, and then cut into the target size to obtain a low oil permeability thermally conductive silicone gasket, which passed the ASTM D5470 test The thermal conductivity of the thermally conductive silicone gasket was used to test the aging weight loss rate at 150°C for 240 hours. The test results are shown in Table 1.

Embodiment 2

[0023] Add 100 grams of vinyl silicone oil, 8 grams of hydrogen-containing silicone oil and 0.01 gram of inhibitor into a stirred tank with a rotating speed of 120 rpm and stir for 30 minutes, then add 900 grams of alumina to the stirred tank, and turn it at a rotating speed of 60 rpm Stir at low temperature for 1 hour, then add 0.2 g of catalyst into the stirred tank, stir at a speed of 30 rpm for 20 minutes, and vacuumize at the same time to obtain a heat-conducting silica gel compound.

[0024] The prepared thermally conductive silicone compound was calendered into a sheet with a thickness of 2mm, cured at 120°C for 10 minutes, and then cut into the target size to obtain a low oil permeability thermally conductive silicone gasket, which passed the ASTM D5470 test The thermal conductivity of the thermally conductive silicone gasket was used to test the aging weight loss rate at 150°C for 240 hours. The test results are shown in Table 1.

Embodiment 3

[0026] Add 100 grams of vinyl silicone oil, 10 grams of hydrogen-containing silicone oil and 0.01 gram of inhibitor into a stirred tank with a rotating speed of 100 rpm and stir for 10 minutes, then add 1200 grams of alumina to the stirred tank, and turn it at a rotating speed of 45 rpm Stir at low temperature for 0.5 hour, then add 0.1 g of catalyst into the stirring tank, stir at a rotation speed of 45 rpm for 40 minutes, and vacuumize at the same time to obtain a heat-conducting silica gel compound.

[0027] The prepared thermally conductive silicone compound was calendered into a sheet with a thickness of 2 mm, cured at a temperature of 150°C for 5 minutes, and then cut into the target size to obtain a low oil permeability thermally conductive silicone gasket, which passed the ASTM D5470 test The thermal conductivity of the thermally conductive silicone gasket was used to test the aging weight loss rate at 150°C for 240 hours. The test results are shown in Table 1.

Technical field

[0001] The invention relates to the application of thermal interface materials, in particular to a low oil leakage heat conduction silica gel gasket with low oil leakage rate and stable thermal conductivity and a preparation method thereof.

Background technique

[0002] In the heat dissipation design of thermal interface materials, due to insufficient contact between thermal interfaces, thermal contact resistance is generated, which leads to serious hindrance in heat flow conduction. To solve this problem, a layer of thermal interface material needs to be placed between the heating element and the cooling element. Commonly used heat dissipation materials include ceramics, thermally conductive silicone grease, and thermally conductive silicone gaskets. Among them, ceramics have high thermal conductivity, but are brittle and difficult to fill the tiny gaps between thermal interfaces, so they cannot be used as interface materials. Because thermal conductive ...

Examples

Embodiment 1

[0020] Add 100 grams of vinyl silicone oil, 4 grams of hydrogen-containing silicone oil and 0.01 gram of inhibitor into a stirred tank with a rotating speed of 60 rpm and stir for 30 minutes, then add 700 grams of aluminum oxide to the stirred tank, and stir at a rotating speed of 30 rpm Stir at low temperature for 1 hour, then add 0.2 g of catalyst into the stirred tank, stir at a speed of 60 rpm for 20 minutes, and vacuumize at the same time to obtain a heat-conducting silica gel compound.

[0021] The prepared thermally conductive silicone compound was calendered into a sheet with a thickness of 2mm, cured at 120°C for 10 minutes, and then cut into the target size to obtain a low oil permeability thermally conductive silicone gasket, which passed the ASTM D5470 test The thermal conductivity of the thermally conductive silicone gasket was used to test the aging weight loss rate at 150°C for 240 hours. The test results are shown in Table 1.

Embodiment 2

[0023] Add 100 grams of vinyl silicone oil, 8 grams of hydrogen-containing silicone oil and 0.01 gram of inhibitor into a stirred tank with a rotating speed of 120 rpm and stir for 30 minutes, then add 900 grams of alumina to the stirred tank, and turn it at a rotating speed of 60 rpm Stir at low temperature for 1 hour, then add 0.2 g of catalyst into the stirred tank, stir at a speed of 30 rpm for 20 minutes, and vacuumize at the same time to obtain a heat-conducting silica gel compound.

[0024] The prepared thermally conductive silicone compound was calendered into a sheet with a thickness of 2mm, cured at 120°C for 10 minutes, and then cut into the target size to obtain a low oil permeability thermally conductive silicone gasket, which passed the ASTM D5470 test The thermal conductivity of the thermally conductive silicone gasket was used to test the aging weight loss rate at 150°C for 240 hours. The test results are shown in Table 1.

Embodiment 3

[0026] Add 100 grams of vinyl silicone oil, 10 grams of hydrogen-containing silicone oil and 0.01 gram of inhibitor into a stirred tank with a rotating speed of 100 rpm and stir for 10 minutes, then add 1200 grams of alumina to the stirred tank, and turn it at a rotating speed of 45 rpm Stir at low temperature for 0.5 hour, then add 0.1 g of catalyst into the stirring tank, stir at a rotation speed of 45 rpm for 40 minutes, and vacuumize at the same time to obtain a heat-conducting silica gel compound.

[0027] The prepared thermally conductive silicone compound was calendered into a sheet with a thickness of 2 mm, cured at a temperature of 150°C for 5 minutes, and then cut into the target size to obtain a low oil permeability thermally conductive silicone gasket, which passed the ASTM D5470 test The thermal conductivity of the thermally conductive silicone gasket was used to test the aging weight loss rate at 150°C for 240 hours. The test results are shown in Table 1.

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