Preparation method of single-component high-fluidity high-thermal-conductivity gel

Abstract

The invention relates to a preparation method of a single-component high-fluidity high-thermal-conductivity gel, the preparation method of the single-component high-fluidity high-thermal-conductivity gel comprises the following production steps: firstly adsorbing a platinum catalyst by using nano fumed silica, then wrapping the platinum catalyst with polymer resin, mixing 0.1-1 part of pretreated platinum catalyst and 80-95 parts of heat-conducting powder, wherein the heat-conducting powder is a mixture of spherical aluminum oxide, silicon nitride and boron nitride, and then mixing with 4-20 parts of silicone oil uniformly, wherein the silicone oil is a mixture of vinyl silicone oil and hydrogen-containing silicone oil, and the ratio of the vinyl silicone oil to the hydrogen-containing silicone oil is (10-20): 1. The gel is stable at normal temperature, and can be quickly cured after being heated to 100-150 DEG C to form an elastic film. The gel can be stored at room temperature for a long time and is stable, good in fluidity, high in automatic dispensing extrusion rate, easy to peel after being heated and cured, free of polluting components and convenient for later repair.

Description

technical field [0001] The invention relates to the technical field of thermal interface materials, in particular to a preparation method of a single-component high-fluidity high-thermal-conduction gel. Background technique [0002] Thermal interface material is a general term for a class of materials that are coated between heat dissipation devices and heat generating devices to reduce the contact thermal resistance between the two. When two surfaces are in contact, due to the structure or surface roughness, there will be some gaps, and the thermal conductivity of air is very small, which will cause a large contact thermal resistance, hinder heat transfer and cause overheating of electronic components . The thermal interface can fill this gap, effectively reducing the contact thermal resistance between the interfaces and improving the heat dissipation performance. Among them, the thermally conductive gel is a flowable paste before curing, which can effectively fill the in...

AI Technical Summary

Problems solved by technology

[0003] Thermally conductive gels are divided into two categories: two-component thermally conductive gels and single-component thermally conductive gels. The single-component gels are not divided into A and B components. The production and tube equipment are simple, easy to use, and do not need to be When mixing the glue, there is no problem of uneven mixing, but it is not stable when stored at room temperature, and it is easy to solidify and agglomerate

In order to solve this contradiction, some products on the market use the method of adding a polymerization inhibitor to delay the crosslinking speed, but they must be stored at low temperature, transportation and use are inconvenient, and it is difficult to truly ensure product stability; the so-called thorough pre-cured products on the market are actually Mixed with a large proportion of methyl silicone oil, it is not 100% real gel, generally has poor fluidity, slow extrusion speed, and high thermal resistance