Heat-conducting silica gel with light specific gravity

Abstract

The invention relates to heat-conducting silica gel with light specific gravity. The heat-conducting silica gel comprises, by weight, 10-18% of organic silicone oil, 5-15% of organic silicon rubber, 65-85% of light-specific gravity heat-conducting filling, 0.3-2% of a silane coupling agent, 0.05-0.1% of a Pt complex compound and 0.01-0.03% of an alkynol type inhibitor. A preparation method of theheat-conducting silica gel includes the following steps that by weight, the organic silicone oil, organic silicon rubber, the light-specific gravity heat-conducting filling and a surface treatment agent are blended according to a proportion; the blended material in the first step is kneaded and stirred; the kneaded and stirred material is cooled to have room temperature, a crosslinking agent and the pt complex compound are added, and through uniform stirring, a mixture is formed; the mixture is vacuumized and defoamed; the heat-conducting silica gel raw materials are subjected to thermocuringto fomr the heat-conducting silica gel. The light-specific gravity heat-conducting silica gel is low in density, excellent in heat-conducting coefficient and capable of reducing the weight of batteries greatly, and is applied to new-energy automobile power batteries and electronic material products, the preparation process is simple and convenient to use, and meanwhile volume production can be performed.

Description

technical field [0001] The invention relates to the fields of electronic material products and new energy thermal interface materials, in particular to a heat-conducting silica gel with a light specific gravity and a preparation method thereof. Background technique [0002] With the advancement of science and technology, people pay more and more attention to energy conservation and emission reduction, and new energy vehicles have become an inseparable part of our daily life of energy conservation and emission reduction. As the most important part of new energy vehicles, batteries often need to be made with large capacity and light weight, so as to reduce the weight of new energy vehicles and make them lightweight. New energy batteries are usually equipped with heat sinks. Since the heat sinks are mostly made of metal, the electronic components and the heat sink cannot be completely in close contact, resulting in unsatisfactory heat dissipation. In order to improve the heat ...

AI Technical Summary

Problems solved by technology

New energy batteries are usually equipped with a heat sink. Since the heat sink is mostly made of metal, the electronic components and the heat sink cannot be completely in close contact, resulting in an unsatisfactory heat dissipation effect.

In order to improve the heat dissipation effect, increase the contact area between the electronic components and the heat sink, and reduce the air thermal resistance, ordinary heat-conducting silica gel and other methods are generally adopted. It has been unable to obtain a good weight reduction and heat dissipation effect. At the same time, ordinary thermal pads are relatively heavy and cannot meet the lightweight requirements of new energy vehicles.

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