Acrylic hyperdispersing agent and preparation method thereof

A technology of hyperdispersant and acrylic acid, which is applied in chemical instruments and methods, transportation and packaging, dissolution, etc. It can solve the problems of weak dispersion ability of hyperdispersant and non-compliance with green production, and achieve low cost and short production cycle , the effect of super dispersing ability

Inactive Publication Date: 2015-06-10
HAO YU ADDITION AGENT
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method of an acrylic hyperdispersant, adding acrylic acid, ethacrylic acid, butyl (meth)acrylate and maleic anhydride as reaction raw materials to a reaction kettle pre-installed with distilled water, and adding an initiator and a chain transfer agent Stir, wherein the proportioning of each raw material is: 40 parts of acrylic acid, 20 parts of ethacrylic acid, 10 parts of butyl (meth)acrylate, 0.8 part of maleic anhydride, (NH 4 ) 2 S 2 o 8 -NaHSO 3 0.8 parts of initiator, 0.2 parts of ethanol, 20 parts of NaOH, and 150 parts of distilled water. Control the reaction temperature at 50°C, the stirring speed at 400r / min, and the reaction time for 4h, then cool to 30°C; add NaOH to the cooled reaction solution, and react for 0.8h to obtain the finished hyperdispersant.

Embodiment 2

[0014] A preparation method of an acrylic hyperdispersant, adding acrylic acid, ethacrylic acid, butyl (meth)acrylate and maleic anhydride as reaction raw materials to a reaction kettle pre-installed with distilled water, and adding an initiator and a chain transfer agent Stir, wherein the proportioning of each raw material is: 60 parts of acrylic acid, 30 parts of ethacrylic acid, 30 parts of butyl (meth)acrylate, 1.2 parts of maleic anhydride, (NH 4 ) 2 S 2 o 8 -NaHSO 3 1.2 parts of initiator, 0.7 parts of ethanol, 50 parts of NaOH, and 150 parts of distilled water. Control the reaction temperature at 80°C, the stirring speed at 650r / min, and the reaction time for 6h, then cool to 50°C; add NaOH to the cooled reaction solution, and react for 1.5h to obtain the finished hyperdispersant.

Embodiment 3

[0016] A preparation method of an acrylic hyperdispersant, adding acrylic acid, ethacrylic acid, butyl (meth)acrylate and maleic anhydride as reaction raw materials to a reaction kettle pre-installed with distilled water, and adding an initiator and a chain transfer agent Stir, wherein the proportioning of each raw material is: 50 parts of acrylic acid, 24 parts of ethacrylic acid, 20 parts of butyl (meth)acrylate, 1 part of maleic anhydride, (NH 4 ) 2 S 2 o 8 -NaHSO 3 1 part of initiator, 0.5 part of ethanol, 35 parts of NaOH, 150 parts of distilled water. Control the reaction temperature at 60°C, the stirring speed at 500r / min, and the reaction time for 5h, then cool to 40°C; add NaOH to the cooled reaction solution and react for 1h to obtain the finished hyperdispersant.

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PUM

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Abstract

The invention relates to an acrylic hyperdispersing agent and a preparation method thereof. The preparation method comprises the following steps: adding 40-60 parts of acrylic acid, 20-30 parts of ethyl acrylic acid, 10-30 parts of (methyl) butyl acrylate, 0.8-1.2 parts of maleic anhydride, 0.8-1.2 parts of initiator, 0.2-0.7 part of chain-transfer agent and 20-50 parts of NaOH used as reaction raw materials into a reaction kettle which is previously filled with 150 parts of distilled water, adding an initiator and a chain-transfer agent, stirring at 400-650 r / min to react at 85 DEG C below for 4-6 hours, and cooling to 30-50 DEG C; and adding NaOH into the cooled reaction solution, and reacting for 0.8-1.5 hours to obtain the hyperdispersing agent finished product. The preparation method has the advantages of short production cycle and low cost. The hyperdispersing agent has the advantages of superhigh dispersing power, no toxicity and no harm, and conforms to the concept on green production.

Description

technical field [0001] The invention relates to the field of hyperdispersants, in particular to an acrylic hyperdispersant and a preparation method thereof. Background technique [0002] In the fields of coatings, papermaking, 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. 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 weight of more than several thousand, which is essentially a surfactant. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/04C08F220/18C08F222/06C08F4/40C08F2/38B01F17/52C09K23/52
Inventor 尹立华
Owner HAO YU ADDITION AGENT
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