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Preparation method of dispersing agent containing sulfo polycarboxylate

A sulfonic acid group-containing polycarboxylate and dispersant technology, which is applied in botany equipment and methods, biocides, animal repellants, etc., can solve the problem of long heat preservation time, unsatisfactory dispersion effect of copolymer dispersant, More expensive and other issues, to achieve the effect of short production cycle, product safety and stability, easy to control

Active Publication Date: 2015-04-22
山东宝龙达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has simple preparation process, low product dosage and strong cement adaptability, but the raw materials methoxypolyethylene glycol monomethacrylate and methoxypolyethylene glycol monoacrylate are relatively high and expensive, and In the polymerization reaction, the holding time is longer
However, the dispersion effect of the copolymer dispersant on pesticides, pigments, dyes and coal water slurry is not ideal

Method used

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  • Preparation method of dispersing agent containing sulfo polycarboxylate
  • Preparation method of dispersing agent containing sulfo polycarboxylate

Examples

Experimental program
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Effect test

Embodiment 1

[0029] One, the preparation of dispersant, the steps are as follows:

[0030] Preparation of solution A: Add 4.3236g of acrylic acid and 2.6028g of 1-hydroxypropyl acrylate into 17.5mL of water three times, and record it as solution A);

[0031] Preparation of solution A: Add 0.5130g of ammonium persulfate into 5.13mL of water, stir to dissolve, and record it as solution B.

[0032] Add 3.3158g AMPS to a four-neck flask equipped with a thermometer, stirrer, nitrogen tube, Y-shaped tube, and constant pressure dropping funnel, add 29mL three times of water, and then add 1.305mL isopropanol, heat up to 60°C, stir and pass Nitrogen for 30min. The temperature was raised to 65°C, and solution A and solution B were added drop by drop. Solution A was dropped in about 1 hour, and solution B was dropped in about 1.5 hours. The temperature was raised to 70° C., and the reaction was kept for 2.5 hours. After the solution is cooled below 30°C, add dropwise a 35% sodium hydroxide solutio...

Embodiment 2

[0050] Add 4.3236 g of acrylic acid and 2.6028 g of 1-hydroxypropyl acrylate into 11.5 mL of three times of water, add 1.025 g of ammonium persulfate into 10.25 mL of three times of water, stir and dissolve to obtain a mixed monomer solution.

[0051] Add 0.5130g of ammonium persulfate into 5.13mL of water, stir and dissolve to obtain an initiator solution.

[0052] Add 3.3158g AMPS to a four-necked flask equipped with a thermometer, stirrer, nitrogen tube, Y-shaped tube, and constant pressure dropping funnel, add 29.5mL of water for three times, then add 1.305mL of isopropanol, heat up to 58°C, pass Nitrogen for 30min. Raise the temperature to 68°C, add the mixed monomer solution and initiator solution drop by drop, the mixed monomer solution drops in about 1 hour, and the initiator solution drops in about 1.5 hours. The temperature was raised to 80° C., and the reaction was kept for 2.5 hours. After the solution is cooled below 30°C, add dropwise a 35% sodium hydroxide sol...

Embodiment 3

[0055] Add 4.3236 g of acrylic acid and 2.6028 g of 1-hydroxypropyl acrylate into 11.5 mL of water three times to obtain a mixed monomer solution; add 1.190 g of ammonium persulfate into 11.90 mL of water, stir and dissolve to obtain an initiator solution.

[0056] Add 4.974g AMPS to a four-necked flask equipped with a thermometer, stirrer, nitrogen tube, Y-shaped tube, and constant pressure dropping funnel, add 46.5mL of water for three times, then add 2.271mL of isopropanol, raise the temperature to 60°C, and blow nitrogen 30min. Raise the temperature to 67°C, add the mixed monomer solution and initiator solution drop by drop, the mixed monomer solution will be dropped in about 1 hour, and the initiator solution will be dropped in about 1.5 hours. The temperature was raised to 70° C., and the reaction was kept for 2.5 hours. After the solution is cooled below 30°C, add dropwise a 35% sodium hydroxide solution to adjust the pH to 7-8. The obtained solution was dropped into ...

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Abstract

The invention relates to a preparation method of a dispersing agent containing sulfo polycarboxylate. The method comprises the steps that acrylamide-2-methyl propanesulfonic acid, acrylic acid, and 2-acryamide-2-methyl propanesulfonic acid are copolymerized in an aqueous solution; persulfate serves as an initiating system; and the water-soluble polymer dispersing agent is formed. The polymer dispersing agent contains sulfonic groups, and has good heat resistance, salt tolerance and environmental adaptability. The method is simple and practicable, short in production cycle, safe and environment-friendly; and the prepared dispersing agent is used for dispersing iron oxide, titanium dioxide, and atrazine in circulating water.

Description

technical field [0001] The method relates to an inorganic powder and a pesticide dispersant and a preparation method thereof, in particular to a preparation method of a sulfonic acid group-containing polycarboxylate dispersant. Background technique [0002] Dispersants are widely used in paints, printing inks, rubber, coal water slurry, cement, papermaking, pesticides and the preparation of nanoparticles, etc., but the existing small molecule dispersants and homopolymer dispersants (such as sodium polyacrylate, molecular weight -6000) The dispersion performance is not very ideal, and it is impossible to obtain a suspension with a high suspension ratio, but the multi-component copolymerization polymer dispersant can combine the characteristics of various monomers, and significantly improve the dispersion performance of the polymer. [0003] CN101475671A provides a comb-shaped copolymer cement dispersant, which has the advantages of low dosage and strong adaptability. The pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/58C08F220/28A01N25/30A01N25/04A01N43/70
Inventor 刘少杰孟庆亮谭业邦
Owner 山东宝龙达新材料有限公司
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