Preparation method of ink-specific titanium dioxide
A special type, titanium dioxide technology, applied in the direction of ink, chemical instruments and methods, applications, etc., can solve the problems of single application system of titanium dioxide and narrow pH range of dispersant, so as to achieve the effect of improving whiteness and dispersibility
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[0029] The invention provides a method for preparing ink-specific titanium dioxide, which includes the steps of beating and dispersing, screening, inorganic coating, and organic treatment. In the process of organic treatment, polysiloxane containing benzene ring and long carbon chain amphiphilic group is used as organic treatment agent.
[0030] During the beating and dispersing process, the temperature of the slurry will increase correspondingly with the increase of time. When the temperature rises to a certain level, the viscosity of the slurry will increase to a certain extent, and the particles will reunite, which is not conducive to the uniform and stable dispersion of titanium dioxide particles. Therefore, in the process of beating and dispersing, the introduction of circulating cooling water has a continuous cooling process for the slurry to prevent the particles from becoming coarse again and better ensure the stability of the viscosity of the slurry.
[0031] Specific...
Embodiment 1
[0052] 1. Take a 2000ml beaker and add 650ml of pure water, start the stirring device, weigh 0.75g of low modulus sodium salt copolymer dispersant and 0.75g of sodium hexametaphosphate dispersant into the beaker, place the beaker in a basin filled with normal temperature tap water , disperse and stir for 8 minutes, then weigh 500 g of the pulverized primary rutile titanium dioxide product, beat and disperse for 90 minutes, filter out the zirconium beads in the slurry with a 100-mesh sieve, and then use a 600-mesh sieve to remove coarse particles. Put the filtered slurry into the wall breaker, adjust the speed to 9 gears, and the temperature at 0°C, break the wall and disperse for 5 minutes, and the slurry is ready for use;
[0053] 2. Take the above-mentioned filtered slurry in a four-necked round bottom flask, dilute it with pure water to a concentration of 300g / L, and measure the pH value of the slurry;
[0054] 3. Heat the above slurry to 60-65°C within 30 minutes, and meas...
Embodiment 2
[0062] 1. Take a 2000ml beaker and add 650ml of pure water, start the stirring device, weigh 0.75g of low modulus sodium salt copolymer dispersant and 0.75g of sodium hexametaphosphate dispersant into the beaker, place the beaker in a basin filled with normal temperature tap water , disperse and stir for 8 minutes, then weigh 500 g of the pulverized primary rutile titanium dioxide product, beat and disperse for 90 minutes, filter out the zirconium beads in the slurry with a 100-mesh sieve, and then filter with a 600-mesh sieve to remove coarse particles, and then Sand the filtered slurry with zirconium beads and disperse it for 90 minutes, filter out the zirconium beads in the slurry with a 100-mesh sieve, then filter through a 600-mesh sieve to remove coarse particles, and put the filtered slurry into a wall breaker In the middle, adjust the speed to 9 gears, the temperature at 0°C, break the wall and disperse for 5 minutes, and prepare the slurry for later use;
[0063] 2. T...
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Abstract
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