Preparation method for high-dispersion deposition white carbon black
A technology of precipitated silica and high dispersion, which is applied in the treatment of fibrous fillers and dyed organosilicon compounds. It can solve the problems of unfavorable industrialization and rising production costs, so as to reduce surface energy, improve processing performance, and reduce time and cost. Effect
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Embodiment 1
[0024] 1) Preparation of umbrella-shaped siloxane dispersant
[0025] The trisiloxane surfactant of 271 grams is joined in the n-butyl acrylate of 172 grams, then adding concentration is 1.2 grams of chloroplatinic acid of 5wt%, the reaction temperature is raised to 85 ℃, and the reaction time is 1 hour, obtained Umbrella silicone coupling agent.
[0026] 2) Preparation of highly dispersed precipitated silica
[0027] Add 100 grams of precipitated white carbon black into 900 grams of absolute ethanol and stir to obtain a uniformly dispersed suspension of white carbon black. Add 10 grams of the umbrella-shaped silicone dispersant prepared in the above step 1) and 10 grams of mercaptotrimethoxysilane coupling agent to the suspension, and then add 4 grams of p-toluenesulfonic acid to adjust the pH of the solution to 4. Then the prepared solution was placed in a water bath and heated to 50°C. React for 4 hours and cool to room temperature. The ethanol solvent is removed by rot...
Embodiment 2
[0029] The difference from Example 1 is:
[0030] Add 100 grams of precipitated white carbon black into 900 grams of absolute ethanol and stir to obtain a uniformly dispersed suspension of white carbon black. 15 grams of the umbrella-shaped silicone dispersant prepared in the above step 1) and 5 grams of vinyltrimethoxysilane coupling agent were added to the suspension, and then 4 grams of sulfuric acid was added to adjust the pH value of the solution to 5. The prepared solution was then placed in a water bath and heated to 79°C. React for 1 hour, cool to room temperature, and then remove the ethanol solvent by rotary evaporation, then dry, pulverize, and finally obtain the final high-dispersion precipitated white carbon black.
Embodiment 3
[0032] 1) Preparation of umbrella-shaped siloxane dispersant
[0033] The trisiloxane surfactant of 271 grams is joined to the α olefin of 286 grams C14-C18, then adding concentration is 1.2 grams of chloroplatinic acid of 5wt%, the temperature of reaction is raised to 75 ℃, and the reaction time is 2 hours, preparation Obtain umbrella-shaped siloxane coupling agent.
[0034] 2) Preparation of highly dispersed precipitated silica
[0035] Add 100 grams of precipitated white carbon black into 900 grams of absolute ethanol and stir to obtain a uniformly dispersed suspension of white carbon black. Add 5 grams of the umbrella-shaped silicone dispersant prepared in the above step 1) and 15 grams of mercaptotrimethoxysilane coupling agent to the suspension, and then add 4 grams of p-toluenesulfonic acid to adjust the pH value of the solution to 6. Then the prepared solution was placed in a water bath and heated to 30°C. React for 6 hours, cool to room temperature, then remove the...
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