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A kind of calcium carbonate slurry dispersant and preparation method thereof

A technology of dispersant and calcium carbonate, which is applied in the treatment of fibrous fillers and dyed polymer organic compounds, and can solve problems that cannot meet actual needs.

Active Publication Date: 2021-07-30
深圳市瑞成科讯实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As people's requirements for paper quality are getting higher and higher, the particle size of calcium carbonate particles is further reduced, the solid content of the coating solution is increased, and the stability requirements for calcium carbonate slurry are also increased. It is no longer possible to use the existing disclosed dispersant. Meet actual needs

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  • A kind of calcium carbonate slurry dispersant and preparation method thereof

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preparation example Construction

[0028] The present invention also provides a kind of preparation method for preparing above-mentioned calcium carbonate slurry dispersant, comprises the following steps:

[0029] (1) mixing maleic anhydride, itaconic acid, reducing agent and water to obtain a primer;

[0030] (2) Mix sodium hydroxide aqueous solution and vinyl monocarboxylic acid to obtain a mixed solution of vinyl monocarboxylic acid salt and vinyl monocarboxylic acid, then mix the mixed solution with sulfonic acid monomer to obtain a mixed solution Monomer aqueous solution; the molar ratio of the sodium hydroxide to vinyl monocarboxylic acid is 1:1.5~3;

[0031] (3) When the temperature of the base material is 80-85°C, add the persulfate initiator aqueous solution and the mixed monomer aqueous solution into the base material dropwise in parallel, and then maintain the temperature of the feed liquid in the range of 80-85°C Inside, carry out copolymerization reaction, obtain copolymer aqueous solution;

[00...

Embodiment 1

[0049] (1) 3g maleic anhydride, 2g itaconic acid, 2g sodium hypophosphite and 30mL water are mixed to obtain the base material;

[0050] (2) Prepare 27mL of sodium hydroxide aqueous solution with a mass percentage concentration of 36%, after cooling to 40°C, mix with 35g of acrylic acid to obtain a mixed solution with a pH value of 2.5;

[0051] (3) Dissolving 15g of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in 15mL of water to obtain an aqueous solution of AMPS; mixing the aqueous solution of AMPS with the mixed solution to obtain an aqueous solution of mixed monomers;

[0052] (4) Heat the base material to 80°C, add the mixed monomer aqueous solution and 20 mL of ammonium persulfate aqueous solution with a concentration of 75 mg / mL into the base material dropwise in parallel, and control the mixed monomer aqueous solution and The dropping rate of the ammonium persulfate aqueous solution is independently 0.1mL / min. After the dropwise addition, the temperature of the fe...

Embodiment 2

[0058] (1) 6g maleic anhydride, 3g itaconic acid, 2g sodium hypophosphite and 30mL water are mixed to obtain the base material;

[0059] (2) Prepare 25 mL of aqueous sodium hydroxide solution with a mass percentage concentration of 36%, and mix it with 35 g of methacrylic acid after cooling to 30° C. to obtain a mixed solution with a pH value of 2;

[0060] (3) Dissolving 12g of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in 15mL of water to obtain an aqueous solution of AMPS; mixing the aqueous solution of AMPS with the mixed solution to obtain an aqueous solution of mixed monomers;

[0061] (4) Heat the base material to 80°C, add the mixed monomer aqueous solution and 22mL potassium persulfate aqueous solution with a concentration of 70mg / mL into the base material dropwise in parallel, and control the mixed monomer aqueous solution and The dropping rate of the potassium persulfate aqueous solution is independently 0.2mL / min. After the dropwise addition, the temperature ...

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Abstract

The invention provides a calcium carbonate slurry dispersant, which is obtained by copolymerization of maleic anhydride, itaconic acid, vinyl monocarboxylic acid and sulfonic acid monomer; the viscosity of the dispersant is 150-200cps, and the solid content is 40~42%, specific gravity is 1.2~1.3g / mL; The quality of described maleic anhydride is 1~15wt.% of total monomer mass; The quality of described itaconic acid is 3~20wt.% of total monomer mass. %; the mass of the vinyl monocarboxylic acid is 35-80 wt.% of the total mass of the monomers; the mass of the sulfonic acid monomer is 5-30 wt.% of the total mass of the monomers. The present invention also provides a preparation method of the calcium carbonate slurry dispersant. Using the dispersant provided by the invention to prepare the calcium carbonate slurry can effectively reduce the viscosity of the calcium carbonate slurry, improve the stability of the calcium carbonate slurry, and meanwhile the obtained calcium carbonate slurry has a higher solid content.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate slurry, in particular to a calcium carbonate slurry dispersant and a preparation method thereof. Background technique [0002] Calcium carbonate is an inorganic raw material widely used in industries such as plastics, rubber, paint and paper. In the paper industry, calcium carbonate is mainly used as a coating pigment. The size and distribution of calcium carbonate particles for coating pigments can affect the sedimentation stability, viscosity, fluidity, etc. of the coating, and have a great influence on the surface strength, gloss, smoothness, whiteness, and printing performance of the paper after coating. big impact. With the paper industry's increasing requirements for paper quality, the particle size of calcium carbonate particles for coating is getting smaller and smaller, and the solid content of calcium carbonate slurry is getting higher and higher. However, due to the reducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/58C08F228/02C08F222/06C08F222/02C09C1/02C09C3/10
CPCC08F220/06C09C1/021C09C3/10C08F220/585C08F222/06C08F222/02
Inventor 胡志滨潘好学鲁代玉沈杰
Owner 深圳市瑞成科讯实业有限公司