Room-temperature vulcanized one-component dealcoholized silicone rubber sealant and preparation method thereof
A technology of room temperature vulcanization and silicone rubber, which is applied in the direction of chemical instruments and methods, adhesives, adhesive additives, etc., can solve the problems of decreased curing performance, difficult bonding performance, poor storage performance and bonding performance, and achieve improved bonding Good performance, good yellowing resistance, and the effect of solving yellowing
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[0041] Examples:
[0042] Choose α,ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mpa.s and dimethyl silicone oil with a viscosity of 500mpa.s. The component ratios are as follows:
[0043] A. 100 parts of α, ω-dihydroxy polydimethylsiloxane
[0044] B. 20 parts of dimethyl silicone oil
[0045] C. 8 parts of methyltrimethoxysilane
[0046] D. The above silane coupling agent 2 servings
[0047] E. 80 parts of calcium carbonate, 10 parts of fumed white carbon black
[0048] F. Tetra-tert-amyl titanate 2 parts
[0049] G. 1 part of hexamethyldisilazane
[0050] Add the above-mentioned hydroxy-terminated polydimethylsiloxane, dimethyl silicone oil and fillers with the above viscosity and parts into the stirring tank, and stir for 2~4 under the conditions of 110℃~130℃, -0.09~-0.1MPa vacuum After hours, the temperature is lowered to below 40°C, and the above-mentioned parts of methyltrimethoxysilane, silane coupling agent, tetra-tert-amyl titanate, and hexamethyldisilazane are seque
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