Acrylics polymeric dispersant and preparation technique and use thereof

A technology of acrylic and preparation process, which is applied in transportation and packaging, chemical instruments and methods, chemical/physical processes, etc. It can solve the problems of unsatisfactory dispersion effect, poor dispersion stability and high preparation cost, and achieve good adaptability, thermal The effect of high stability and simple operation

Inactive Publication Date: 2009-03-25
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing polymer dispersants are homopolymer dispersants, which have defects such as unsatisfactory dispersion effect, poor dispersion stability, high preparation cost or serious pollution.

Method used

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  • Acrylics polymeric dispersant and preparation technique and use thereof
  • Acrylics polymeric dispersant and preparation technique and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of dispersant

[0027] Add 3333 parts of deionized water, 2 parts of chain transfer agent sodium bisulfite, and 100 parts of sodium styrene sulfonate into a four-necked flask, and heat while stirring; when the temperature in the four-necked flask rises to 60°C, add 333 parts of acrylic acid, 33 parts of maleic anhydride and 5 parts of initiator ammonium persulfate, heat preservation reaction for 2 hours; naturally cool to room temperature, adjust the pH value to 7-8 with aqueous sodium hydroxide solution; put the prepared liquid into a vacuum Dry in an oven at 60°C to obtain the target dispersant.

[0028] The number-average relative molecular weight of the prepared acrylic polymer dispersant is measured to be 7800-9100 by using aqueous gel permeation chromatography (GPC) with water as mobile phase and sodium polyacrylate as standard substance.

[0029] 2) Determination of the dispersibility of the dispersant to inorganic minerals

[0030] Add 0.4g of t...

Embodiment 2

[0040] Add 3333 parts of deionized water, 3 parts of chain transfer agent sodium bisulfite, and 100 parts of sodium styrene sulfonate into the four-necked flask, and heat while stirring; when the temperature in the four-necked flask rises to 80°C, add 222 parts of acrylic acid, 33 parts of maleic anhydride and 9 parts of initiator ammonium persulfate, heat preservation reaction for 2 hours; naturally cool to room temperature, adjust the pH value to 7-8 with aqueous sodium hydroxide solution; put the prepared liquid into a vacuum Dry in an oven at 80°C to obtain the target dispersant.

[0041] Using aqueous gel permeation chromatography (GPC), using water as mobile phase and sodium polyacrylate as standard, the number average relative molecular weight of the prepared acrylic polymer dispersant is measured to be 8400-9800.

[0042] Measured by the operation described in Example 1: BaSO with prepared dispersant 4 、TiO 2 , CaCO 3 , ZnO suspension suspension rate were 91.67%, 95...

Embodiment 3

[0044] Add 3333 parts of deionized water, 5 parts of chain transfer agent sodium bisulfite, and 100 parts of sodium styrene sulfonate into the four-necked flask, and heat while stirring; when the temperature in the four-necked flask rises to 70°C, add 167 parts of acrylic acid, 33 parts of maleic anhydride and 15 parts of initiator ammonium persulfate, heat preservation reaction for 2 hours; naturally cool to room temperature, adjust the pH value to 7-8 with aqueous sodium hydroxide solution; put the prepared liquid into a vacuum Dry in an oven at 70°C to obtain the target dispersant.

[0045] The number-average relative molecular weight of the prepared acrylic polymer dispersant is measured to be 9745-11200 by using aqueous gel permeation chromatography (GPC) with water as mobile phase and sodium polyacrylate as standard substance.

[0046] Measured by the operation described in Example 1: BaSO with prepared dispersant 4 、TiO2 , CaCO 3 , ZnO suspension suspension rate were ...

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Abstract

The invention discloses an acrylic polymer dispersing agent with high dispersion and stability, low preparation cost and environmental protection as well as a preparation process and applications thereof. The acrylic polymer dispersing agent is prepared through free radical copolymerization of acrylic acid, sodium styrene sulphonate and maleic anhydride, the number average relative molecular weight of the copolymer is between 2000 and 40000, and the dispersing agent has advantages of high thermal stability, good water solubility, excellent adaptability to acid and alkali and good dispersion stability, and also has good dispersion effects to calcium carbonate, zinc oxide, barium sulfate, titanium dioxide and pesticide Atrazine water dispersible granules, imidacloprid water dispersible granules and Aatrex water dispersible granules, and can be widely used in the pesticide, pigment, dyestuff, coal water slurry and other industries. In addition, the preparation process has the advantages of simple operation, short cycle, environmental protection and low cost, and is suitable for the industrial scale production.

Description

technical field [0001] The invention relates to a polymer dispersant and its preparation process and application, in particular to an acrylic polymer dispersant and its preparation process and application. Background technique [0002] Dispersants have important applications in pigments, dyes, coal water slurry, pesticides and other industries, which can make the dispersed substances achieve good dispersion effect and stability. However, the traditional small molecule dispersant does not adsorb very firmly to the particle surface, and is easy to desorb from the surface, resulting in re-aggregation or precipitation. The polymer dispersant can stabilize the system by relying on its own steric hindrance and electrostatic repulsion, and the dispersion effect is more effective than that of the small molecule dispersant. At present, the application of polymer dispersants is more and more widely, and its main application fields are as follows: 1) used as water scale inhibitor disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C09K23/52
Inventor 任天瑞吁松瑞陈军
Owner SHANGHAI NORMAL UNIVERSITY
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