Fire-resistant silicone rubber and preparation method thereof
A silicone rubber and refractory technology, applied in the field of silicone rubber, can solve problems such as poor strength, achieve the effects of improving combustion efficiency, enhancing flame retardancy, and increasing the strength of porcelain
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[0076] The preparation method of the carbon nanotubes loaded with platinum catalyst includes one or more of impregnation method, microwave method and pickling method;
[0077] Further preferably, the preparation method of the carbon nanotubes loaded with platinum catalyst comprises:
[0078] adding chloroplatinic acid, absolute ethanol and vinyltriethoxysilane to the carboxylated carbon nanotubes in sequence, mixing them, then adding sodium bicarbonate to stir and reflux, filtering and drying to obtain the carbon nanotubes loaded with platinum catalyst .
[0079] Specifically, the preparation method of the carbon nanotubes loaded with platinum catalyst can be obtained by impregnation method, microwave method, pickling method, etc., preferably according to the structural characteristics of Karstedt catalyst, carbon nanotubes modified with vinyltriethoxysilane The carbon nanotubes loaded with platinum catalyst were prepared by anchoring platinum with vinyl groups modified on th...
Embodiment 1
[0082] 70 parts of methyl vinyl raw rubber (molecular weight 70w g / mol, side chain is vinyl, vinyl content is 0.03%), 3 parts of carbon nanotubes loaded with platinum catalyst (the aspect ratio of carbon nanotubes is 50 : 1, the mass ratio of platinum catalyst and carbon nanotube is 1:100) successively fully disperses on the three-roll machine, forms glue base A;
[0083] Put the base glue A into the kneader, and continuously add 20 parts of silane-modified glass fiber (the aspect ratio is 30), 25 parts of white carbon black (the particle size is 300 mesh, the specific surface area is 400m 2 / g), 5 parts of hydroxy silicone oil and 2 parts of aminosilane, fully mixed to obtain base gum B;
[0084] Add 30 parts of methyl vinyl raw rubber (molecular weight 70w g / mol, side chain is vinyl, vinyl content is 0.03%) to 100 parts of natural wollastonite (particle size 600 mesh, aspect ratio 10:1), 0.5 parts of zinc stearate are mixed to obtain base gum C;
[0085] Put base rubber B ...
Embodiment 2
[0090] 70 parts of methyl vinyl raw rubber (molecular weight 60w g / mol, vinyl content 0.05%, side chain is methyl), 1 part of carbon nanotubes loaded with platinum catalyst (carbon nanotube aspect ratio 100:1, The mass ratio of platinum catalyst to carbon nanotubes is 1:1000) to be fully dispersed on a three-roll machine successively to form base glue A;
[0091] Put the base glue A into a kneader, and continuously add 10 parts of silane-modified glass fibers (with an aspect ratio of 40), 25 parts of fumed silica (with a specific surface area of 200m 2 / g), 5 parts of hydroxy silicone oil and 2 parts of methyltrimethoxysilane, fully mixed to obtain base gum B;
[0092]Add 30 parts of methyl vinyl raw rubber (molecular weight 60w g / mol, vinyl content 0.05%, side chain is methyl group) to 150 parts of natural wollastonite (particle size 1000 mesh, aspect ratio 8:1), 1 Parts of stearic acid are mixed to obtain base gum C;
[0093] Put base rubber B and base rubber C into a kn...
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