The invention discloses an organosilicone
defoamer and a preparation method of the organosilicone deformer. The
defoamer is prepared from the following raw materials in percentage by weight: 10-40% of
simethicone (201), 10-25% of high-boiling
silicone oil, 1-5% of a thickener, 40-60% of water, 5-25% of an emulgator, and 1-5% of
fumed silica, wherein all of the raw materials account for 100%. The preparation process comprises the following steps: (a) weighing the
simethicone (201) and the
fumed silica in different weight ratios and adding into a reaction kettle, raising the temperature to about 150 DEG C, and stirring for 5-8 hours to prepare a
silicon cream; (b) adding the high-boiling
silicone oil and the emulgator into the prepared
silicon cream, heating to about 40 DEG C, stirring for 30 minutes, then adding the thickener and the deionized water, continuing to stir for 2-4 hours, cooling, discharging, and packaging. The organosilicone
defoamer provided by the invention provides a reasonable way to treat byproduct high-boiling residues of the organosilicone, improves the stability and the
dispersity of the
emulsion, guarantees the storage time, and greatly improves the defoaming capability, and the using temperature range of the materials is relatively wide.