Method for preparing high-solid-content and low-viscosity suspended nano calcium carbonate slurry and re-suspended nano calcium carbonate power

A technology of nano-calcium carbonate and high solid content, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of inconvenient transportation and storage, no dispersion of nano-calcium carbonate cations, etc., and achieve convenient transportation, reduced dosage, and uniform distribution Effect

Inactive Publication Date: 2011-02-09
山东海泽纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, nano-calcium carbonate is generally dispersed in water by anionic dispersants such as polycarboxylate sodium salt or polyphosphate, and there is no report on the successful cationic dispersion of nano-calcium carbonate.
For customers, the aqueous slurry is easy to use and does not need to be dispersed, but it is inconvenient for transportation and storage

Method used

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  • Method for preparing high-solid-content and low-viscosity suspended nano calcium carbonate slurry and re-suspended nano calcium carbonate power
  • Method for preparing high-solid-content and low-viscosity suspended nano calcium carbonate slurry and re-suspended nano calcium carbonate power
  • Method for preparing high-solid-content and low-viscosity suspended nano calcium carbonate slurry and re-suspended nano calcium carbonate power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Put 240mL of water in a beaker, preheat it in a constant temperature water bath at 70°C and electric stirring, add 3.0g of cetyltrimethylammonium bromide and polydiallyldimethylammonium chloride to the water (5:1 mass ratio) mixed dispersant, 0.5g polyethylene glycol 20000 and sodium hydroxymethyl cellulose (1:1) mixed dispersant stirred for 5min, took by weighing 60g active nano-calcium carbonate, under the situation of stirring Slowly add water, if there are bubbles, add a few drops of tributyl phosphate defoamer, and continue stirring for 10 minutes to obtain a cation-dispersed nano-calcium carbonate suspension slurry with a solid content of 20%.

Embodiment 2

[0038] Put 210mL of water in a beaker, preheat it in a constant temperature water bath at 70°C and electric stirring, add 3.6g of dodecyltrimethylammonium bromide and polyethyleneimine (5:1) to the water to mix and disperse dispersant, 0.8g polyethylene glycol 20000 and polyvinyl alcohol 500 (3:1) mixed dispersant and stirred for 5 minutes, weighed 90g active nano-calcium carbonate, slowly added to water while stirring again, if there are bubbles, add a few drops of phosphoric acid Tributyl ester defoamer, continue to stir for 10 minutes to obtain a cation-dispersed nano-calcium carbonate suspension slurry with a solid content of 30%.

Embodiment 3

[0040] Put 150mL of water in a beaker, preheat it in a constant temperature water bath at 70°C and electric stirring, add 6g of tributylmethylammonium chloride and dodecyltrimethylammonium chloride (1:5) into the water to mix and disperse After stirring 1.5g of polyethylene glycol 20000 for 5 minutes, weigh 150g of active nano-calcium carbonate, slowly add it into water while stirring, if there are bubbles, add a few drops of tributyl phosphate defoamer, and continue stirring for 10 minutes to get The cation-dispersed nano-calcium carbonate slurry with 50% solid content is diluted with water to the suspension slurry with 30% solid content, and it is allowed to stand for 24 hours without delamination or sedimentation.

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Abstract

The invention discloses a method for preparing a high-solid-content and low-viscosity suspended nano calcium carbonate slurry and re-suspended nano calcium carbonate power. The method comprises the following steps: preparing cationic and anionic high-solid-content and low-viscosity nano calcium carbonate slurry by using active nano calcium carbonate subjected to surface modification as a raw material; adding water into the obtained slurry to dilute the high-solid-content and low-viscosity suspended nano calcium carbonate slurry so as to obtain any low-viscosity suspended stable slurry; and then drying and crushing the high-solid-content suspended slurry through a special process so as to obtain nano calcium carbonate power which can be re-suspended in water. The obtained product prepared by the method of the invention is simple in preparation process, good in storage stability and wide in application range, and can be customized according to customer demands.

Description

technical field [0001] The invention relates to a preparation method of nano calcium carbonate, in particular to a preparation method of high solid content and low viscosity nano calcium carbonate suspension slurry and resuspendable powder. Background technique [0002] High-speed coating requires coatings with low viscosity, high fluidity and quick-drying performance. High solid content and low viscosity are the basic requirements for nano-calcium carbonate coating. The viscosity of the slurry system is related to the particle size and solid content. For heavy calcium, when the solid content of the slurry reaches 70%, it still has good fluidity. China 200710038419.6 and 200810033243.x both use high-speed shear to disperse ultrafine light calcium. For nano-calcium carbonate, in order to realize the high-solid and low-viscosity slurry system, it is facing further improvement and breakthrough of high-efficiency dispersing aids and preparation process. [0003] Color inkjet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 娄从江陈祥芝郭安慧朱孝川
Owner 山东海泽纳米材料有限公司
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