Defoaming agent and preparation method thereof
A defoamer and antistatic agent technology, applied in the field of defoamer and its preparation, can solve the problems of prolonged cycle, waste of raw materials and products, production capacity limitation, etc., and achieves strong foam suppression ability, fast defoaming speed, excellent The effect of defoaming
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[0016]The invention provides a technical solution: a defoamer and its preparation method, including water-soluble silicone oil: polysiloxane is firstly hydrolyzed by chlorosilane, and then condensed with polyether, yellow or brown oily viscous Viscous transparent liquid, relative density (25℃ / 25℃) 1.04~1.08, acid value<0.2mgKOH / g, viscosity (50℃)(1.5~5)×10-4m2 / s; silicone grease: refined synthetic oil As a base oil thickening inorganic thickener, refined with structural stabilizers and anti-corrosion additives; Span S-80: yellow oily liquid, dispersible in warm water and ethanol, soluble in propylene glycol, liquid paraffin, ethanol , methanol or ethyl acetate and other organic solvents, HLB=4.3; Tween T-80: easily soluble in water, soluble in ethanol, vegetable oil, ethyl acetate, methanol, toluene, insoluble in mineral oil, gelatinous at low temperature , recovered after heating, with special odor and slightly bitter taste; myristyl alcohol ether MOA-4: easily soluble in oil...
Embodiment 1
[0031] 1) First add 13kg of water into the heating kettle, then add 2.2kg of stearic acid, heat, stir, and then ready to use;
[0032] 2) Water-soluble silicone oil: It is firstly hydrolyzed by chlorosilane to form polysiloxane, and then condensed with polyether, yellow or brown oily viscous transparent liquid, relative density (25°C / 25°C) 1.04~1.08 , acid value <0.2mgKOH / g, viscosity (50°C) (1.5~5)×10-4m2 / s, 201-500CS silicone oil and 201-1000CS silicone oil, composed of 200kg silicone mixture and silicone grease 4kg, Span S- 80 8.4kg, Tween T-804kg, myristyl ether MOA-4 2.6kg and antistatic agent SE-103kg form an emulsifier mixture, add it to the emulsifier and stir evenly;
[0033] 3) Then add the solution in the above step 1), stir and emulsify;
[0034] 4) Then add 240ml of propylene glycol;
[0035] 5) Pour cooling water into the interlayer of the emulsifying machine and cool it down to normal temperature to produce finished products.
Embodiment 2
[0037] 1) First add 3.25kg of water into the heating kettle, then add 0.55kg of stearic acid, heat, stir, and then use it;
[0038] 2) Water-soluble silicone oil: It is firstly hydrolyzed by chlorosilane to form polysiloxane, and then condensed with polyether, yellow or brown oily viscous transparent liquid, relative density (25°C / 25°C) 1.04~1.08 , acid value <0.2mgKOH / g, viscosity (50°C) (1.5~5)×10-4m2 / s, 201-500CS silicone oil and 201-1000CS silicone oil, composed of 50kg of silicone mixture and 1kg of silicone grease, Span S- 80 2.1kg, Tween T-80 1kg, tetradecyl alcohol ether MOA-4 0.65kg and antistatic agent SE-100.75kg to form an emulsifier mixture, add it to the emulsifier and stir evenly;
[0039] 3) Then add the solution in the above step 1), stir and emulsify;
[0040] 4) Then add propylene glycol 60ml;
[0041] 5) Pour cooling water into the interlayer of the emulsifying machine and cool it down to normal temperature to produce finished products.
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