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Rosin graft copolymer dispersant and preparation technique and use thereof

The technology of a graft polymer and preparation process is applied to a rosin graft polymer dispersant and its preparation process and application field, which can solve the problems of unsatisfactory dispersion effect, poor dispersion stability and high preparation cost, and achieve good dispersion effect, The effect of high thermal 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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  • Rosin graft copolymer dispersant and preparation technique and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of rosin derivative monomer

[0026] In the there-necked flask, add 16.7 mass parts of maleopimaric acid chloride, 5.4 mass parts of hydroxyethyl methacrylate (HEMA), 3.2 mass parts of pyridine, 70 mass parts of toluene and a small amount of hydroquinone, pass N 2 Protect, heat to 100°C, and keep warm for 48 hours; after the reaction, wash with water for 3 times, then evaporate toluene under reduced pressure to obtain rosin derivative monomer (MPAHEMA).

[0027] 2) Preparation of dispersant

[0028] 200 parts of deionized water, 1 part of chain transfer agent sodium bisulfite, and 15 parts of rosin derivatives (MPAHEMA) were added to the four-necked flask, and heated while stirring; when the temperature in the four-necked flask rose to 70 ° C, Add 21.6 parts of acrylic acid, 20 parts of sodium styrene sulfonate and 2.1 parts of initiator ammonium persulfate, and keep it warm for 3 hours; naturally cool to room temperature, and adjust the pH value to 7-8 ...

Embodiment 2

[0035] 1) Preparation of rosin derivative monomer

[0036] As described in Example 1.

[0037] 2) Preparation of dispersant

[0038] 200 parts of deionized water, 2.3 parts of chain transfer agent sodium bisulfite, and 10 parts of rosin derivatives (MPAHEMA) were added to the four-necked flask, and heated while stirring; when the temperature in the four-necked flask rose to 90 ° C, Add 21.6 parts of acrylic acid, 20 parts of sodium styrene sulfonate and 4.6 parts of initiator ammonium persulfate, and keep the reaction for 3 hours; naturally cool to room temperature, and adjust the pH value to 7-8 with aqueous sodium hydroxide solution; put the prepared liquid into Dry in a vacuum oven at 70°C to obtain the target dispersant.

[0039] 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 rosin grafted polymer dispersant is measured to be 12000-14000.

[...

Embodiment 3

[0043] 1) Preparation of rosin derivative monomer

[0044] As described in Example 1.

[0045] 2) Preparation of dispersant

[0046] 200 parts of deionized water, 2.9 parts of chain transfer agent sodium bisulfite, and 5 parts of rosin derivatives (MPAHEMA) were added to the four-necked flask, and heated while stirring; when the temperature in the four-necked flask rose to 80 ° C, Add 21.6 parts of acrylic acid, 20 parts of sodium styrene sulfonate and 5.8 parts of initiator ammonium persulfate, and keep the reaction for 3 hours; naturally cool to room temperature, and adjust the pH value to 7-8 with aqueous sodium hydroxide solution; put the prepared liquid into Dry in a vacuum oven at 70°C to obtain the target dispersant.

[0047] 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 rosin grafted polymer dispersant is measured to be 12000-14000.

[0...

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Abstract

The invention discloses a rosin graft polymer dispersing agent with high dispersion and stability, low preparation cost and environmental protection as well as a preparation process and applications thereof. The rosin graft polymer dispersing agent is prepared through free radical polymerization of acrylic acid, sodium styrene sulfonate and rosin derivative, the number average relative molecular weight of the rosin graft polymer is between 12000 and 14000, wherein, the rosin derivative is a composition of maleopimaric acid acyl chloride and 2-hydroxyethyl methacrylate. The dispersing agent has advantages of high thermal stability, good water solubility, excellent adaptability to alkali and good dispersion stability, and also has good dispersion effects to pesticide Aatrex water dispersible granules, and can be widely used in the pesticide, paint 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 a rosin grafted 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...

Claims

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Application Information

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IPC IPC(8): B01F17/52C09K23/52
Inventor 任天瑞陈桢马海林陈军
Owner SHANGHAI NORMAL UNIVERSITY
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