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Method for preparing hyper-dispersant used for mixed size

A technology of hyperdispersant and mixed slurry, which is applied in the direction of chemical instruments and methods, transportation and packaging, dissolution, etc., can solve the problems of polymer molecular weight increase, etc., and achieve the effects of reducing product viscosity, low raw material cost, and easy industrialization

Inactive Publication Date: 2011-06-15
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology disclosed is to carry out polymerization under strong alkaline conditions. If the solid component concentration of the reaction system is high in the polymerization of this neutralized state, the viscosity of the aqueous solution of the reaction system will rise significantly along with the polymerization, and the molecular weight of the obtained polymer will be large. Tendency to increase

Method used

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  • Method for preparing hyper-dispersant used for mixed size
  • Method for preparing hyper-dispersant used for mixed size

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Configuration materials, material A: acrylic acid 70g, sodium methallyl sulfonate 1g, maleic anhydride 0.6g, styrene 0.2g, deionized water 20g, mix well at room temperature; material B: 30(wt)% hydrogen peroxide 0.5g, ammonium persulfate 8g, deionized water 55g; C1 material: 0.5g of 30(wt)% hydrogen peroxide; C2 material: 0.5g of 30(wt)% hydrogen peroxide; D material: 7.7g of acrylic acid, methallyl sulfonate 4 g of sodium nitrate, 2.4 g of maleic anhydride, 0.4 g of 3-mercaptopropionic acid, and 90 g of deionized water were mixed uniformly at room temperature. In the four-neck flask with condenser, thermometer, constant pressure dropping funnel, and mixer, first add material D, heat the water temperature of the constant temperature water bath to 60°C, add material C1 to the reaction kettle at one time, and start adding material A dropwise and B material, the dropping time is 3h, after the dropping, add C2 material to the reactor at one time, raise the temperature of th...

Embodiment 2

[0031]Configuration materials, material A: 277.2g methacrylic acid, 4g sodium 2-acrylammonium-2-methylpropanesulfonate, 2.4g maleic anhydride, 0.55g vinylpyrrolidone, 10g sodium bisulfite, 80g deionized water , mix well at room temperature; material B: potassium persulfate 33.6g, deionized water 220g; material C1: ammonium persulfate 2g, deionized water 10g; material C2: ammonium persulfate 2g, deionized water 10g; material D: 30.8 g of acrylic acid, 6 g of sodium methallyl sulfonate, 9.6 g of maleic anhydride, 1 g of 2-mercaptobutanol, 3 g of sodium bisulfite, and 220 g of deionized water were mixed uniformly at room temperature. In a four-necked flask with a condenser, a thermometer, a constant pressure dropping funnel, and a mixer, first add the mixed material D, and after raising the water temperature of the constant temperature water bath to 70°C, add C1 material to the reaction kettle at one time, and start adding A separately. Material and material B, the dropping time ...

Embodiment 3

[0033] Configuration materials, material A: 550g of acrylic acid, 8g of sodium methallyl sulfonate, 4.8g of maleic anhydride, 54g of methoxypolyethylene glycol (meth)acrylate (nEO=23), 30g of sodium sulfite, deionized 160g of water, mix well at room temperature; material B: potassium persulfate 121.6g, deionized water 440g; material C1: potassium persulfate 4g; material C2: potassium persulfate 4g; material D: acrylic acid 77g, methallyl Sodium sulfonate 5g, maleic anhydride 3g, sodium sulfite 10g, deionized water 440g, mix well at room temperature. In a four-necked flask with a condenser, a thermometer, a constant pressure dropping funnel, and a mixer, and a constant temperature water bath, first add the mixed material D, and after the temperature rises to 80°C, add the C1 material to the reaction kettle at one time, and start adding the A material dropwise. And material B, the dropping time is 3h, after the dropping, add C2 to the reactor at one time, raise the temperature o...

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Abstract

The invention provides a method for preparing a hyper-dispersant used for mixed size with a water-phase solution polymerization method. The method comprises the following steps of: (1) preparing materials A, B, C1, C2 and D, wherein the materials A and D comprise unsaturated carboxylic acid monomers, multi-functionality functional monomers, molecular weight regulators, reducing system reductant, deionized water and pH regulators, and the materials B, C1 and C2 comprise oxidation initiation system initiators and deionized water; (2) adding the prepared material D in a reactor, and adding all of the material C1 in the reactor after heating to the reaction temperature of 50-100 DEG C; (3) starting to simultaneously drop the material A and the material B for 2-6h; (4) adding all of the material C2 in the reactor after dropping; (5) regulating the temperature in the reactor to 60-100 DEG C and keeping the temperature for reaction for 0.5-4h; and (6) lowering the temperature below 50DEG C after reaction, regulating pH to 5-9 and discharging to obtain the hyper-dispersant. The method adopts simple technology and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a method for preparing a hyperdispersant for mixed slurry, in particular to a method for preparing a novel polymer hyperdispersant for mixed slurry by aqueous phase solution polymerization. Background technique [0002] In the process of preparation and use of ultrafine powder, due to the problem of grinding limit in grinding, it needs to be classified. When ultrafine powder is classified by wet method, it is easy to agglomerate due to the small particle size and large surface energy of ultrafine powder. With the existence of aggregates, the microstructure of the powder becomes uneven, which greatly hinders the dispersion of the powder. The preparation process of slurry mixed slurry is to suspend slurry particles in water, but the particles must be dispersed due to the aggregation of van der Waals gravity. The suspension slurry requires high solid content, stability and good rheology. , it is necessary to add a hyperdispersant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/08C08F228/02C08F220/58C08F290/06C08F2/10B01F17/36B01F17/42C09K23/36C09K23/42
Inventor 刘方何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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