Prepn of transparent nanometer calcium carbonate for high-grade lithographic ink
A technology of offset printing ink and calcium carbonate, applied in the direction of ink, chemical instruments and methods, applications, etc., can solve problems such as not being able to adapt to printing requirements
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Embodiment 1
[0019] Add 0.8 cubic meters of calcium hydroxide slurry with a concentration of 4.0% (weight concentration) in a reaction kettle of 1 cubic meter, and control the initial temperature of the reaction at 8 ° C. 2 The kiln gas with an amount of 17-25% (volume concentration) is carbonized, and the flow rate of the kiln gas is 7.5m 3 After carbonization for 0.5 hour, add a mixture of 0.1 kg of tartaric acid and 0.2 kg of lactose, continue carbonization until the pH value of the calcium carbonate slurry reaches 7, then add 0.3 kg of aluminum sulfate and 0.2 kg of magnesium sulfate to obtain uniformly dispersed nano-carbonate The calcium slurry is ready for use.
[0020] Dissolve 0.3 kg of rosin and 0.3 kg of hydrogenated rosin soap in warm water at 85°C to make a coating solution, then add the coating agent to the nano-calcium carbonate slurry that has been heated to 90°C, and perform constant temperature coating treatment for 1 hour. Filter the slurry while it is hot, and dry it a...
Embodiment 2
[0023] Add 0.75 cubic meters of calcium hydroxide slurry with a concentration of 13.0% (weight concentration) in a reaction kettle of 1 cubic meter. The initial temperature of the reaction is controlled at 30 ° C. 2 Kiln gas with an amount of 17-25% (volume concentration) is carbonized. When the carbonization rate reaches 35%, add 0.8 kg of maltose and continue carbonization until the pH of the calcium carbonate slurry reaches 7, then add 0.5 kg of sodium hexametaphosphate and 2 Kilogram of magnesium chloride, get the evenly dispersed nano-calcium carbonate slurry for use.
[0024] Dissolve 1.5kg of dimerized rosin in warm water at 95°C to make a coating solution, then add the coating agent to the nano-calcium carbonate slurry that has been heated to 90°C, perform constant temperature coating treatment for 0.5 hours, and filter the slurry , Dry at 110°C to obtain nanometer transparent ink calcium. The average particle size of the product is 35 nanometers, the particle size di...
Embodiment 3
[0026] Add 0.8 cubic meters of calcium hydroxide slurry with a concentration of 8.0% (weight concentration) in a reaction kettle of 1 cubic meter, and control the initial temperature of the reaction at 20 ° C. 2 The kiln gas with an amount of 17-25% (volume concentration) is carbonized, and the flow rate of the kiln gas is 6.0m 3 / h, add 1 kg of sodium hexametaphosphate and 0.2 kg of lactose after carbonization for 2 hours. Continue carbonization until the pH of the calcium carbonate slurry reaches 7, then add 0.25 kilograms of sodium dodecylbenzene sulfonate and 3 kilograms of aluminum sulfate to obtain an evenly dispersed nanometer calcium carbonate slurry for use.
[0027] Dissolve 1.2 kg of disproportionated rosin and 0.3 kg of stearic acid in warm water at 85°C to make a coating solution, then add the coating agent to the nano-calcium carbonate slurry that has been heated to 90°C, and perform constant temperature coating treatment for 1.5 hours , filter the slurry while ...
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