A kind of flame-retardant liquid silica gel for bonding electrical components and preparation method thereof
A technology of liquid silica gel and electrical components, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc. The effect of knot strength, small particle size, and improvement of flame retardant performance
Active Publication Date: 2022-08-02
上海珏晟新材料科技有限公司
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Problems solved by technology
[0003] However, in order to increase the flame retardancy of the existing liquid silica gel, it mainly relies on adding a large amount of flame retardant to improve the flame retardancy of the liquid silica gel. However, due to the excessive addition of powder, the fluidity of the rubber material is poor and the viscosity is high. It even loses fluidity and turns into a paste, which brings great problems in construction, and due to the addition of a large amount of flame retardants, the strength of the cured colloid is very poor, and the service life is also greatly reduced
Method used
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Examples
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Embodiment 1-7
[0025] The parts by weight of the raw materials of the flame-retardant liquid silica gel in Examples 1-7 are shown in Table 1.
[0026] Table 1 The parts by weight of each raw material of flame retardant liquid silica gel in Examples 1-7
[0027]
[0028] As used in Examples 1-7, the vinyl content in the vinyl-terminated silicone oil is 0.1-0.65%; the specific surface area of fumed silica is 150-250 m 2 / g; the hydrogen content in the hydrogen-containing silicone oil is 0.05-0.75%; the mesh number of the modified aluminum hydroxide is 1000-1000 mesh; the mesh number of the modified diatomite is 1000-5000 mesh; the silane coupling agent is methyl trimethoxysilane.
[0029] In Examples 1-7, the modified aluminum hydroxide was prepared by the following preparation steps: after grinding the aluminum hydroxide through a 1000-mesh sieve, adding it to glacial acetic acid, heating and stirring for 30 min, filtering out the aluminum hydroxide powder and drying; After the aluminu...
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Abstract
The present application relates to the technical field of adhesive silica gel, and specifically discloses a flame-retardant liquid silica gel for bonding electrical components and a preparation method thereof. The flame-retardant liquid silica gel is prepared from the following raw materials in parts by weight: 40-60 parts of vinyl-terminated silicone oil; 10-15 parts of fumed silica; 2-6 parts of hydrogen-containing silicone oil; 0.1-1 part of platinum catalyst; flame retardant 48-80 parts; 1-3 parts of silane coupling agent; 0.0002-0.001 part of acetylene cyclohexanol; its preparation method includes the following steps: after stirring and mixing vinyl terminated silicone oil and silane coupling agent, adding fumed silica and Flame retardant, stirring and heating in a vacuum environment, grinding the mixture, stirring and cooling, dividing the mixture into A material and B material, adding platinum catalyst to A material, sieving and packing after stirring and mixing, in B material Add hydrogen-containing silicone oil and acetylene cyclohexanol, stir and mix, sieve and pack. The flame-retardant liquid silica gel of the present application can be used for the gluing operation of the high-speed rail industry, the solar energy industry, and the electronic and electrical industry, and has the advantage of high flame retardancy.
Description
technical field [0001] The present application relates to the technical field of adhesive silica gel, and more particularly, to a flame-retardant liquid silica gel for bonding electrical components and a preparation method thereof. Background technique [0002] Flame retardant liquid silicone is commonly used in mechanical bonding and sealing of electronic equipment such as power supply, photovoltaic modules and communication equipment, as well as bonding and fixing of electronic components. [0003] However, in order to increase the flame retardant performance of the existing liquid silica gel, it mainly relies on adding a large amount of flame retardant to improve the flame retardant performance of the liquid silica gel. It even loses its fluidity and turns into a paste, which brings great problems in construction, and due to the large amount of flame retardants added, the colloid strength after curing is very poor, and the service life is also greatly reduced. SUMMARY O...
Claims
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IPC IPC(8): C09J183/07C09J183/05C09J11/04
CPCC09J183/04C09J11/04C08L2201/02C08L2203/20C08K2003/2227C08L83/04C08K13/06C08K9/04C08K3/22C08K7/26C08K3/34C08K5/5419
Inventor 陈辉
Owner 上海珏晟新材料科技有限公司