Terpolymer dispersants and preparation technique and use thereof

A terpolymer and preparation process technology, applied in transportation and packaging, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of unsatisfactory dispersion effect, poor dispersion stability, high preparation cost, and achieve good adaptability , excellent dispersion performance, simple operation effect

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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  • Terpolymer dispersants and preparation technique and use thereof
  • Terpolymer dispersants and preparation technique and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of dispersant

[0028] Add 1000 parts of deionized water, 4 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 70°C, add 105 parts of acrylic acid, 95 parts of hydroxypropyl acrylate and 13 parts of initiator ammonium persulfate, heat preservation reaction for 2.5 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 oven Dry at 70°C to obtain the target dispersant.

[0029] 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 terpolymer dispersant was measured to be 19200.

[0030] 2) Determination of the dispersibility of the dispersant to inorganic minerals

[0031] Add 0.4g of this dispersant ...

Embodiment 2

[0041] Add 1000 parts of deionized water, 8 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 90°C, add 105 parts of acrylic acid, 76 parts of hydroxypropyl acrylate and 25 parts of initiator ammonium persulfate, heat preservation reaction for 2.5 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 oven Dry at 80°C to obtain the target dispersant.

[0042] 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 terpolymer dispersant was measured to be 2400.

[0043] The operation described in Example 1 records: the suspension rate of the titanium dioxide suspension prepared with the prepared dispersant is 98.14%, and the...

Embodiment 3

[0045] Add 1000 parts of deionized water, 6 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 80°C, add 105 parts of acrylic acid, 57 parts of hydroxypropyl acrylate and 37 parts of initiator ammonium persulfate, heat preservation reaction for 2.5 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 oven Dry at 80°C to obtain the target dispersant.

[0046] Using aqueous gel permeation chromatography (GPC), using water as the mobile phase and sodium polyacrylate as the standard, the number average relative molecular weight of the prepared terpolymer dispersant was measured to be 13,000.

[0047] The operation described in Example 1 records: the suspension rate of the titanium dioxide suspension prepared with the prepared dispersant is 98.01...

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Abstract

The invention discloses a terpolymer dispersing agent with high dispersion and stability, low preparation cost and environmental protection as well as a preparation process and applications thereof. The terpolymer dispersing agent is prepared through free radical copolymerization of acrylic acid, sodium styrene sulfonate, hydroxypropyl acrylate or 2-hydroxyethyl methacrylate, the number average relative molecular weight of the terpolymer 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 and fipronil water dispersible granule, 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 present invention relates to a polymer dispersant and its preparation process and application, in particular to a terpolymer 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 di...

Claims

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Application Information

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