Heat-conducting sticking silica gel

Abstract

The invention relates to heat-conducting sticking silica gel. The heat-conducting sticking silica gel is prepared from the following raw materials in parts by weight: 98 to 99 parts of a matrix, 0.7 to 1.2 parts of a cross-linking agent, 0.27 to 0.6 part of an adhesive, 0.01 to 0.1 part of an inhibitor and 0.02 to 0.1 part of a catalyst, wherein the matrix is prepared by sequentially adding methyl vinyl silicone oil, a diluting agent and heat-conducting filling into a kneading machine at the weight ratio of (19 to 21) to (4 to 6) to (73 to 75), wherein the heat-conducting filling needs to be added for a plurality of times; the heat-conducting filling is stirred for a period of time at a low speed; after the powder is completely mixed into the silicone oil, the rotary speed of the kneading machine is improved; meanwhile, a heating function is started and the temperature is set to be 150 DEG C; after the temperature is reached, the materials are mixed for 2h; finally, a mixture is stirred for 10min under the vacuum degree of 0.8MPa; the matrix is poured into a sealing bucket when the matrix is hot, and then the sealing bucket is sealed and a product is preserved for later use.

Description

technical field [0001] The invention relates to a thermally conductive silica gel, in particular to a concentrating solar aluminum sheet bonding silica gel with medium thermal conductivity, medium strength, high adhesiveness, anti-poisoning and good thixotropy, belonging to the field of organic silica gel adhesives. Background technique [0002] At present, the concentrating solar heat conduction silica gel on the market is divided into solvent type and solvent-free type. The solvent type is mainly added with toluene, and the addition of solvent is mainly to increase the fluidity. The disadvantage is that toluene is harmful to the human body and is not environmentally friendly. Due to the volatilization of toluene (the boiling point of toluene is 110°C), the cured sample may have some cavities, and there will be gaps between the heat transfer powders, causing heat transfer interruptions, resulting in The heat of the device is concentrated too much, causing local overheating ...

AI Technical Summary

Problems solved by technology

The disadvantage is that toluene is harmful to the human body and is not environmentally friendly. Due to the volatilization of toluene (the boiling point of toluene is 110°C), the cured sample may have some cavities, and there will be gaps between the heat transfer powders, causing heat transfer interruptions, resulting in The heat of the device is highly concentrated, causing local overheating of the device, and even burning the device

The fluidity of the solvent-free type is not good enough, which leads to inconvenient operation and affects the use

At the same time, both of these two kinds of silica gel are slightly poisoned, which makes the glue not fully cured, resulting in a decline in the overall performance of the product; there is also insufficient adhesive force provided by the silica gel, and there is a phenomenon of falling off during later use.

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