High-performance thermal conductive silicone rubber and preparation method thereof

Abstract

The invention relates to high-performance thermal conductive silicone rubber which comprises the following raw materials in mass percent: 4-22 percent of raw silicone rubber, 4-22 percent of silicone oil, 60-80 percent of thermal conductive filler powder, 0.1-4 percent of a coupling agent and 0.1-3 percent of a release agent. The high-performance thermal conductive silicone rubber is high and stable in heat conductivity coefficient and good in processing performance; when the thermal conductive silicone rubber is used for forming products, roll banding and mold sticking are avoided, the defective rate of the products is reduced, and the production cost is reduced. A preparation method for the high-performance thermal conductive silicone rubber comprises the following processing steps: weighing all materials according to the formula; adding the thermal conductive filler powder in a first reaction still, and adding the coupling agent for performing surface treatment on the thermal conductive filler powder; adding the silicone oil and the raw silicone rubber in a kneading machine; starting the kneading machine and mixing for 15-30 minutes; adding the mixture of the thermal conductive filler powder and the coupling agent into the kneading machine; adding the release agent into the kneading machine and continuously mixing for 30-50 minutes; pouring out materials in the kneading machine to obtain a finished product. The preparation method has the advantages of simple process, good easiness for operation and high production efficiency.

Description

technical field [0001] The invention relates to the technical field of heat-conducting materials, in particular to a high-performance heat-conducting silicone rubber and a preparation method thereof. Background technique [0002] Thermally conductive silicone rubber is a kind of thermally conductive medium material synthesized by a special process based on raw silicon rubber, adding various auxiliary materials, and is specially produced for the design of using gaps to transfer heat. It can fill the gaps and complete the heating parts and heat dissipation. The heat transfer between parts also plays the role of insulation, shock absorption, sealing, etc., which can meet the design requirements of miniaturization and ultra-thin equipment. Good thermal conductivity filler material. [0003] The existing heat-conducting silicone rubber has low and unstable thermal conductivity and poor processing performance. When using this heat-conducting silicone rubber to form products, it i...

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Problems solved by technology

[0003] The existing heat-conducting silicone rubber has low and unstable thermal conductivity and poor processing performance. When using this heat-conducting silicone rubber to form products, it is easy to stick to the roller and mold, which increases the defective rate of the product, increases the production cost, and reduces the economic benefit. , there is a need to improve

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