Preparation method for organosilicone high temperature resisting black iron oxide
A technology of iron oxide black and high temperature resistance, applied in the field of chemical pigments, can solve the problems of discoloration, limiting the use range of iron oxide black, fading and other problems, and achieves the effects of high tinting strength, good acid and alkali resistance, and improved high temperature stability.
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[0008] A method for preparing organosilicon high-temperature-resistant iron oxide black, using the iron oxide black prepared by the sodium hydroxide oxidation method, directly using the undried oxidized filter cake, adding ethanol solution equivalent to 2% by weight of the iron oxide black filter cake and 1.5% quartz sand, 2000rpm high-speed grinding for 15 minutes, take out and dry, add appropriate amount of water and beat for 20 minutes to make a slurry with a concentration of 55%, and add 5% of the slurry weight of methyltriethoxysilane, 2% Dimethyldiethoxysilane, 7% phenyltriethoxysilane and 0.3% hollow floating beads, heated to 65°C in a water bath, stirred for 3 hours, then refined by colloid mill to a particle size of less than 40μm, filtered , drying and powdering is the finished product.
[0009] The present invention forms a layer of organosilicon-hollow beads on the iron oxide black surface through the reaction between oxymethyltriethoxysilane, dimethyldiethoxysilan...
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