Method for improving stability of organic silicon emulsion
A technology of silicone emulsion and polyorganosiloxane, which is applied in the preparation of silicone emulsion and the preparation field of improving the stability of silicone emulsion, which can solve the problems of dilution stability, shear resistance, high temperature resistance and low temperature resistance And other issues
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Embodiment 1
[0060] The first step: at room temperature, add 0.05 parts of sodium hydroxide ethanol solution to 45 parts of A-1, and keep the reaction for 4 hours at a temperature of 80 ° C and a rotation speed of 100 rpm;
[0061] The second step: add 5 parts of polyether modified polysiloxane B-1 to the mixture obtained in the first step, and continue the heat preservation reaction for 0.5h under the above reaction conditions; Rotate to disperse for 1 hour to form a composition SC-1 with a cross-linked structure;
[0062] The third step: continue to add 0.1 parts of methyltriethoxysilane to the second step, and keep the reaction at 100°C for 3 hours to form a composition SC-2 with a spatial structure;
[0063] Step 4: Add 1 part of hydrophobic fumed silica to composition SC-2, and use an emulsifier at a speed of 10,000 rpm to fully grind and shear at 50°C, so that the particle size of the silica is less than 1 μm;
[0064] The fifth step: add 2 parts of Span 60, 3 parts of Tween 60 and ...
Embodiment 2
[0067] Step 1: At room temperature, add 0.2 parts of potassium hydroxide ethanol solution to 30 parts of A-2, and keep the reaction for 2 hours at a temperature of 100°C and a rotation speed of 300 rpm;
[0068] Step 2: Add 10 parts of polyether-modified polysiloxane B-3 to it, and continue the heat preservation reaction for 1 hour under the above reaction conditions; then add 20 parts of water, and disperse it for 0.5 hours at a speed of 1500 rpm through the dispersing disk equipment to form Composition SC-1 with a cross-linked structure;
[0069] The third step: continue to add 0.3 parts of isooctyltriethoxysilane to the second step, and keep the reaction at 120°C for 2 hours to form a composition SC-2 with a spatial structure;
[0070] Step 4: Add 2 parts of hydrophobic precipitated silica to Composition SC-2, and use a ball mill at a speed of 2,000 rpm to fully grind and shear at 80°C, so that the particle size of the silica is less than 1 μm;
[0071] The fifth step: add...
Embodiment 3
[0074] Step 1: At room temperature, add 0.1 part of sodium hydroxide ethanol solution to 15 parts of A-3, and keep the reaction for 1 hour at a temperature of 130°C and a rotation speed of 500 rpm;
[0075] The second step: Add 2 parts of polyether modified polysiloxane B-2 to the mixture obtained in the first step, and continue the heat preservation reaction for 1.5h under the above reaction conditions; Rotate to disperse for 1.5 hours to form a composition SC-1 with a cross-linked structure;
[0076] The third step: continue to add 2 parts of butyltriethoxysilane to the composition SC-1, and keep the reaction at 140°C for 2 hours to form a composition SC-2 with a spatial structure;
[0077] Step 4: Add 3 parts of hydrophobic precipitated silica to composition SC-2, and use a grinder at a speed of 5000 rpm to fully grind and shear at 30°C, so that the particle size of the silica is less than 1 μm;
[0078] The fifth step: add 4 parts of isomeric tridecyl alcohol polyoxyethyl...
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