Method for modifying nano calcium carbonate by titanate and preparation method of PVC (polyvinyl chloride) plastic
A technology of nano-calcium carbonate and titanate, which is applied in the treatment of fibrous fillers and dyed low-molecular organic compounds, can solve the problems of poor compatibility of nano-calcium carbonate and not greatly improved rheological properties, and achieve improved The effects of mechanical properties and rheological properties, strong binding force, and good compatibility
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[0023] Example 1
[0024] Add nano-calcium carbonate with an average particle size of 30nm into a large flask containing deionized water, place the flask in a constant temperature water bath, install a high-speed stirrer for the flask, and insert the stirring rod to a suitable position below the liquid surface. Control the temperature of the water bath to 50°C. Start the mixer and control the speed to 2500rpm. After stirring for 5 minutes, bis(dioctyloxypyrophosphate) ethylene titanate accounting for 0.4% of the mass of nanometer calcium carbonate is added, and stirring is continued for 60 minutes to prepare a calcium carbonate dispersion. The average particle size of the nanoparticles in the calcium carbonate dispersion liquid was measured with the Master2000 laser particle size analyzer of Malvern, UK, to be 440nm. Then, the calcium carbonate dispersion is filtered, dried, ground and passed through a 200-mesh sieve to obtain modified nano-calcium carbonate.
[0025] Based on t...
Example Embodiment
[0026] Example 2
[0027] Add nano-calcium carbonate with an average particle size of 35nm into a large flask containing deionized water, place the flask in a constant temperature water bath, install a high-speed stirrer for the flask, and insert the stirring rod to a suitable position below the liquid surface. Control the temperature of the water bath at 55°C. Start the mixer and control the speed to 3000rpm. After stirring for 7 minutes, 0.6% bis(dioctyloxypyrophosphate) ethylene titanate accounting for the mass of nanometer calcium carbonate is added, and stirring is continued for 80 minutes to obtain a calcium carbonate dispersion. The average particle size of the nanoparticles in the calcium carbonate dispersion liquid was measured by the Master2000 laser particle size analyzer of Malvern, UK, to be 405nm. Then, the calcium carbonate dispersion is filtered, dried, ground and passed through a 200-mesh sieve to obtain modified nano-calcium carbonate.
[0028] Based on the qua...
Example Embodiment
[0029] Example 3.
[0030] Add nano-calcium carbonate with an average particle size of 40nm into a large flask containing deionized water, place the flask in a constant temperature water bath, install a high-speed stirrer for the flask, and insert the stirring rod to a suitable position below the liquid surface. Control the temperature of the water bath to 60°C. Start the mixer and control the speed to 3500rpm. After stirring for 8 minutes, bis(dioctyloxypyrophosphate) ethylene titanate accounting for 0.9% of the mass of nanometer calcium carbonate is added, and stirring is continued for 90 minutes to obtain a calcium carbonate dispersion. The average particle size of the nanoparticles in the calcium carbonate dispersion liquid was 340nm measured with the Master2000 laser particle size analyzer of Malvern, UK. Then, the calcium carbonate dispersion is filtered, dried, ground and passed through a 200-mesh sieve to obtain modified nano-calcium carbonate.
[0031] Based on the qual...
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