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
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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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