A kind of insulating elastic silicone gasket with special bonding performance and preparation method thereof

Abstract

The invention discloses an insulation elastic silicone pad with special adhesive property and a preparation method of the insulation elastic silicone pad. The insulation elastic silicone pad is prepared from vinyl end-capping phenyl silicone oil, liquid silicon resin, hydrogen-containing silicone oil, modified filler, a flame retardant and a catalyst. The preparation method comprises the following steps: (1) preparation of a base material: adding the vinyl end-capping phenyl silicone oil, the liquid silicon resin, the modified filler and the flame retardant into a kneading machine for kneading, and then adding the hydrogen-containing silicone oil and the catalyst for kneading to obtain the base material; (2) defoaming: performing kneading and vacuumizing deforming at the same time; (3) vulcanization: adding the base material subjected to defoaming into a roller press, pressing into a pad with a certain thickness, and performing baking and vulcanization. The initial adhesive strength of the insulation elastic silicone pad is relatively low, so that construction operation is facilitated; as time goes on, the adhesive strength of the pad is obviously enhanced; after 48 hours, extremely high adhesive strength can be achieved; the preparation method disclosed by the invention is easy to operate and low in production cost.

Description

technical field

[0001] The invention relates to a thermal interface material, in particular to an insulating elastic silicone gasket with special bonding performance and a preparation method thereof. Background technique

[0002] The development of electronic products towards miniaturization and portability is an inevitable trend of technological development. To meet this development trend, not only the size of electronic components is required to be smaller and smaller, but also the packaging density of electronic components is required to be higher and higher. The increase in packaging density will also bring about a sharp accumulation of heat, resulting in an increase in the internal temperature of electronic products, which will affect the stability, reliability and life of electronic components. High temperatures can endanger the junctions of semiconductors, damage the connection interface of the circuit, increase the resistance of the conductor and cause mechanical str...

Examples

preparation example Construction

[0060] The preparation method of the above-mentioned insulating elastic silicone gasket with special adhesive properties comprises the following steps:

[0061] 1) Base material preparation: Add vinyl-terminated phenyl silicone oil, liquid silicone resin, modified filler and flame retardant into the kneader, knead evenly, add hydrogen-containing silicone oil and catalyst, and knead for 2 to 4 hours to obtain the base material;

[0062] 2) Degassing: vacuumize while kneading for 0.5~1h;

[0063] 3) Vulcanization: Put the defoamed material into a roller press, press it into a gasket with a certain thickness, and bake it in an oven at 100-150°C for 10-20 minutes to obtain an insulating elastic silicone pad with special adhesive properties piece.

Embodiment 1

[0066] An insulating elastic silicone gasket with special adhesive properties is prepared according to the following steps:

[0067] 1) Mix 60 parts by mass of vinyl-terminated methylphenyl silicone oil with a viscosity of 300mPa.s, 15 parts by mass of liquid silicone resin, 200 parts by mass of modified spherical alumina with a particle size of 10 μm, and 200 parts by mass of a particle size of 40 μm Modified spherical alumina, 150 parts by mass of modified spherical alumina with a particle size of 90 μm, 100 parts by mass of modified spherical boron nitride, 150 parts by mass of modified nano-zinc oxide and 50 parts by mass of zinc borate are added to the kneader, kneaded Uniformly, then add 4 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 10 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.06%, and 0.4 parts by mass of a platinum catalyst with a concentration of 2000ppm, and knead for 3 hours to obtain a base ...

Embodiment 2

[0072] An insulating elastic silicone gasket with special adhesive properties is prepared according to the following steps:

[0073] 1) Mix 30 parts by mass of vinyl-terminated methylphenyl silicone oil with a viscosity of 300mPa.s, 10 parts by mass of liquid silicone resin, 100 parts by mass of modified spherical alumina with a particle size of 10 μm, and 100 parts by mass of modified spherical alumina with a particle size of 40 μm Modified spherical alumina, 150 parts by mass of modified spherical alumina with a particle size of 90 μm, 100 parts by mass of modified spherical boron nitride, 50 parts by mass of modified nano-zinc oxide and 10 parts by mass of aluminum hydroxide are added to the kneader, Knead evenly, then add 4 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 20 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.06%, and 0.1 parts by mass of a platinum catalyst with a concentration of 2000 ppm, and k...

technical field

[0001] The invention relates to a thermal interface material, in particular to an insulating elastic silicone gasket with special bonding performance and a preparation method thereof. Background technique

[0002] The development of electronic products towards miniaturization and portability is an inevitable trend of technological development. To meet this development trend, not only the size of electronic components is required to be smaller and smaller, but also the packaging density of electronic components is required to be higher and higher. The increase in packaging density will also bring about a sharp accumulation of heat, resulting in an increase in the internal temperature of electronic products, which will affect the stability, reliability and life of electronic components. High temperatures can endanger the junctions of semiconductors, damage the connection interface of the circuit, increase the resistance of the conductor and cause mechanical str...

Examples

preparation example Construction

[0060] The preparation method of the above-mentioned insulating elastic silicone gasket with special adhesive properties comprises the following steps:

[0061] 1) Base material preparation: Add vinyl-terminated phenyl silicone oil, liquid silicone resin, modified filler and flame retardant into the kneader, knead evenly, add hydrogen-containing silicone oil and catalyst, and knead for 2 to 4 hours to obtain the base material;

[0062] 2) Degassing: vacuumize while kneading for 0.5~1h;

[0063] 3) Vulcanization: Put the defoamed material into a roller press, press it into a gasket with a certain thickness, and bake it in an oven at 100-150°C for 10-20 minutes to obtain an insulating elastic silicone pad with special adhesive properties piece.

Embodiment 1

[0066] An insulating elastic silicone gasket with special adhesive properties is prepared according to the following steps:

[0067] 1) Mix 60 parts by mass of vinyl-terminated methylphenyl silicone oil with a viscosity of 300mPa.s, 15 parts by mass of liquid silicone resin, 200 parts by mass of modified spherical alumina with a particle size of 10 μm, and 200 parts by mass of a particle size of 40 μm Modified spherical alumina, 150 parts by mass of modified spherical alumina with a particle size of 90 μm, 100 parts by mass of modified spherical boron nitride, 150 parts by mass of modified nano-zinc oxide and 50 parts by mass of zinc borate are added to the kneader, kneaded Uniformly, then add 4 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 10 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.06%, and 0.4 parts by mass of a platinum catalyst with a concentration of 2000ppm, and knead for 3 hours to obtain a base ...

Embodiment 2

[0072] An insulating elastic silicone gasket with special adhesive properties is prepared according to the following steps:

[0073] 1) Mix 30 parts by mass of vinyl-terminated methylphenyl silicone oil with a viscosity of 300mPa.s, 10 parts by mass of liquid silicone resin, 100 parts by mass of modified spherical alumina with a particle size of 10 μm, and 100 parts by mass of modified spherical alumina with a particle size of 40 μm Modified spherical alumina, 150 parts by mass of modified spherical alumina with a particle size of 90 μm, 100 parts by mass of modified spherical boron nitride, 50 parts by mass of modified nano-zinc oxide and 10 parts by mass of aluminum hydroxide are added to the kneader, Knead evenly, then add 4 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 20 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.06%, and 0.1 parts by mass of a platinum catalyst with a concentration of 2000 ppm, and k...