Low-viscosity calcined kaolin, low-viscosity calcined kaolin slurry and preparation method thereof
A technology of calcined kaolin and low viscosity, which is applied in the direction of fibrous filler, dyed polymer organic compound treatment, coating, etc. It can solve the problems that affect the application range of calcined kaolin and the viscosity of the slurry, and achieve good practicability and reaction conditions Mild, easy-to-prepare effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0033] In the preparation method of the above-mentioned low-viscosity calcined kaolin, the polyvinyl alcohol solution is directly added to the slurry of the calcined kaolin, and after drying, the low-viscosity calcined kaolin is obtained. If the polyvinyl alcohol solution is only added when preparing the calcined kaolin slurry, the viscosity of the calcined kaolin slurry cannot be significantly reduced. The invention has simple preparation process, mild reaction conditions, good repeatability and is suitable for large-scale production. The prepared low-viscosity calcined kaolin has been tested, simulated and applied in production, and the effect is remarkable and the practicability is good.
[0034]Preferably, the mass concentration of the calcined kaolin slurry is 20-55%. Usually, calcined kaolin and water are mixed in a weight ratio of 1-3:1. When the mass concentration of calcined kaolin slurry reaches more than 55%, the higher the concentration, the faster the viscosity w...
Embodiment 1
[0047] The low-viscosity calcined kaolin in this embodiment includes calcined kaolin and polyvinyl alcohol adsorbed on the surface of the calcined kaolin, and the polyvinyl alcohol is 0.3% of the mass of the calcined kaolin. Calcined kaolin: average particle size 0.9μm; polyvinyl alcohol specification: 17-99.
[0048] The preparation method of the low-viscosity calcined kaolin of the present embodiment:
[0049] Dissolve polyvinyl alcohol in hot water at 98°C in advance, stir for 20 minutes, and prepare a solution with a mass concentration of 2%. The calcined kaolin is prepared into a slurry with a mass concentration of 40%, sodium hexametaphosphate is added as a dispersant, and the sodium hexametaphosphate is 0.3% by mass of the calcined kaolin. Add the above-prepared polyvinyl alcohol solution into the calcined kaolin slurry in an amount of 0.3% of the mass of the calcined kaolin. The calcined kaolin slurry containing polyvinyl alcohol is dried in a spray dryer, and then d...
Embodiment 2
[0053] The low-viscosity calcined kaolin in this embodiment includes calcined kaolin and polyvinyl alcohol adsorbed on the surface of the calcined kaolin, and the polyvinyl alcohol is 0.05% of the mass of the calcined kaolin. Calcined kaolin: average particle size 0.9μm; polyvinyl alcohol specification: 17-88.
[0054] The method for preparing low-viscosity calcined kaolin in this embodiment.
[0055] Dissolve polyvinyl alcohol in hot water at 98°C in advance, stir for 20 minutes, and prepare a solution with a mass concentration of 2%. The calcined kaolin is formulated into a slurry with a mass concentration of 50%, and sodium polyacrylate is added as a dispersant, and the sodium polyacrylate is 0.3% of the mass of the calcined kaolin. The polyvinyl alcohol solution prepared above is added to the calcined kaolin slurry in an amount of 0.05% of the mass of the calcined kaolin. The calcined kaolin slurry containing polyvinyl alcohol is dried in a spray dryer, and then disperse...
PUM
| Property | Measurement | Unit |
|---|---|---|
| degree of polymerization | aaaaa | aaaaa |
| alcoholysis degree | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More