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Hyperdispersant and preparation method thereof

A hyperdispersant and initiator technology, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve the problems of non-conforming to green production and weak dispersing ability of hyperdispersant, and achieve low cost and short production cycle The effect of short, simple synthesis preparation process

Inactive Publication Date: 2013-05-01
JIAOZUO BOYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersing ability of the currently produced hyperdispersants is not strong, and contains some toxic substances, which do not conform to the concept of green production

Method used

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  • Hyperdispersant and preparation method thereof
  • Hyperdispersant and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0017] The preparation method of hyperdispersant in the present invention is: add acrylic acid, methacrylic acid and maleic anhydride in the reactor that distilled water is housed in advance, and add initiator, chain transfer agent and reaction monomer and stir, various raw materials wherein The weight ratio of , additive and solvent is: 60 parts of acrylic acid, 50 parts of methacrylic acid, 30 parts of maleic anhydride, 1 part of redox initiator composed of ammonium persulfate and potassium sulfite, 0.5 part of ethanol, and 150 parts of distilled water. Control the reaction temperature to 60°C, the stirring speed to 500r / min, and the reaction time to 4h, then cool to 40°C; add 35 parts of NaOH to the cooled reaction solution, and react for 1h to obtain the finished hyperdispersant. , The solid content of the resulting hyperdispersant finished product is 60%.

Embodiment 2

[0019] The preparation method of hyperdispersant in the present invention is: add acrylic acid, methacrylic acid and maleic anhydride in the reactor that distilled water is housed in advance, and add initiator, chain transfer agent and reaction monomer and stir, various raw materials wherein , the content of additives and solvents are: 40 parts of acrylic acid, 30 parts of methacrylic acid, 20 parts of maleic anhydride, 0.8 parts of a redox initiator composed of ammonium persulfate and potassium sulfite, 0.2 parts of ethanol, and 150 parts of distilled water. Control the reaction temperature to 30°C, the stirring speed to 300r / min, and the reaction time to 3h, then cool to 30°C; add 20 parts of NaOH to the cooled reaction solution, and react for 1h to obtain the finished product of hyperdispersant, after inspection , The solid content of the resulting hyperdispersant finished product is 40%.

Embodiment 3

[0021] The preparation method of hyperdispersant in the present invention is: add acrylic acid, methacrylic acid and maleic anhydride in the reactor that distilled water is housed in advance, and add initiator, chain transfer agent and reaction monomer and stir, various raw materials wherein , the content of additives and solvents are: 70 parts of acrylic acid, 60 parts of methacrylic acid, 40 parts of maleic anhydride, 1.2 parts of redox initiator composed of ammonium persulfate and potassium sulfite, 0.7 part of ethanol, and 150 parts of distilled water. Control the reaction temperature to 80°C, the stirring speed to 600r / min, and the reaction time to 5h, then cool to 50°C; add 50 parts of NaOH to the cooled reaction solution, and react for 1h to obtain the finished hyperdispersant. , The solid content of the resulting hyperdispersant finished product is 80%.

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PUM

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Abstract

The invention discloses a hyperdispersant and a preparation method thereof. A molecular chain of the hyperdispersant comprises acrylic acid, methylacrylic acid and maleic anhydride which are copolymerized, and the molecular weight is 3,000-30,000 g / mol. The hyperdispersant is simple to prepare, short in preparation cycle and low in cost; the prepared hyperdispersant is superior in dispersion capacity; isopropanol is adopted as a chain transfer agent in copolymerization reaction in the process of preparing the dispersant, so that the non environmental protection property due to the adoption of mercaptoacetic acid as the chain transfer agent in the past is avoided; and the produced hyperdispersant is nontoxic and harmless, and accords with the green production concept.

Description

technical field [0001] The invention relates to a dispersant used in paint, papermaking and chemical industries and a preparation method thereof, belonging to the technical field of new materials and chemical industry. Background technique [0002] In the fields of coatings, titanium dioxide, magnetic materials, ceramics, rubber and plastics, etc., in order to obtain a uniform and stable dispersion, it is often necessary to use a dispersant. When using traditional small molecule dispersants, the stability of the system is poor, and it also has adverse effects on the appearance, hardness and aging resistance of the paint film. [0003] In recent years, hyperdispersants have become a new generation of high-efficiency dispersants, which have a significant effect on the dispersion of pigments, especially on wettability and stability, and have greatly improved the application performance of pigments. Hyperdispersant refers to a surface-active polymer compound with a molecular we...

Claims

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Application Information

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IPC IPC(8): B01F17/52C08F220/06C08F222/06C08F2/38C09K23/52
Inventor 王贵生邵国斌
Owner JIAOZUO BOYANG TECH
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