Low volatility low oil permeability thermally conductive silicone grease filler and preparing method thereof

Abstract

The invention provides low volatility low oil permeability thermally conductive silicone grease filler and a preparing method thereof. The low volatility low oil permeability thermally conductive silicone grease filler is prepared from, by weight, 100 parts of dimethicone, 100-300 parts of spherical aluminum oxide with the diameter of 10-30 micrometers, 100-300 parts of spherical aluminum oxide with the diameter of 1-3 micrometers, 10-30 parts of nano zinc oxide particles, 2-10 parts of vinyl tri(beta-methoxyethoxy)silane, 2-10 parts of triethoxyvinylsilane and 500-1,000 parts of xylylene. Thepermeating amount of silicone oil in thermally conductive silicone grease is small, silicone grease cannot become dry, the thermal conductivity of silicone grease cannot be influenced, the volatilityof silicone grease is also small, and the use of a lamp cannot be influenced. A test shows that the content of volatile matter in thermally conductive silicone grease is 0.092%, the freeness is 0.19%, and the thermal conductivity coefficient is 2.6 W / m.K.

Description

technical field [0001] The invention discloses a heat-conducting silicone grease filler and a preparation method thereof, in particular to a low-volatility and low-permeation oil heat-conducting silicone grease filler and a preparation method thereof. Background technique [0002] With the continuous development of LED lighting technology, the demand for LEDs is also increasing, and LED lighting lamps are likely to replace traditional lamps. However, the current LED lighting has inherent defects, that is, the LED chip generates a lot of heat, and it needs to be dissipated in time, otherwise it will affect the service life of the LED lighting fixtures. The heat-conducting silicone grease has excellent thermal conductivity and high temperature resistance. Ideal thermally conductive material to heat sinks. In the heat-conducting silicone grease of the prior art, at high temperatures, the silicone oil in the heat-conducting silicone grease will gradually seep out, which will po...

AI Technical Summary

Problems solved by technology

However, the current LED lighting has inherent defects, that is, the LED chip generates a lot of heat, and it needs to be dissipated in time, otherwise it will affect the service life of the LED lighting fixtures. The heat-conducting silicone grease has excellent thermal conductivity and high temperature resistance. Ideal thermally conductive material to heat sinks

In the heat-conducting silicone grease of the prior art, at high temperatures, the silicone oil in the heat-conducting silicone grease will gradually seep out, which will pollute the LED lamp. The volatilization of low and medium molecular substances will affect the light transmittance of LED lights