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Water-based grafting modified carbon black and preparation method thereof

A technology of graft modification and modification of carbon black, which is applied in the direction of fibrous fillers, applications, coatings, etc., can solve the problems of increased viscosity of carbon black particles, insufficient storage stability, etc., and achieve excellent dispersion and strong space Stability, the effect of strong electrostatic stability

Inactive Publication Date: 2014-12-10
SANMING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional water-based carbon black, after a long period of time, the viscosity increases, the carbon black particles further aggregate and tend to settle, and the storage stability may not be sufficient

Method used

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  • Water-based grafting modified carbon black and preparation method thereof

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preparation example Construction

[0017] In the preparation of graft-modified carbon black, although there is no restriction on the order of addition of organic monomers containing hydrophilic groups, the preferred order of addition includes dissolving acrylic acid and acrylamide and adding them to the carbon black aqueous solution, followed by adding Maleic anhydride and potassium persulfate into a reactor containing an aqueous carbon black solution.

[0018] The reaction is preferably carried out in an inert atmosphere, and the preferred inert gas for the reaction is nitrogen. During the reaction, the temperature of the reaction material is preferably controlled at 50-90°C, and the reaction time is about 30min-300min. During the reaction, the reaction material is stirred.

Embodiment 1

[0021] Weigh 1 mol of methyl methacrylate and place it in a three-necked flask, heat it in a water bath, weigh 1 mol of PEG 800 and place it in a constant pressure funnel, when the water bath is heated to 90°C, add PEG800 dropwise in a nitrogen atmosphere, and heat under reflux. Stopped after 60min to obtain a large monomer. Weigh 0.025mol of macromonomer, 0.05mol of acrylic acid in a constant pressure funnel, weigh 5.0g of N330 primary carbon black particles in a three-neck flask, add 50ml of distilled water, ultrasonically disperse for 5min, add maleic anhydride 0.05mol, potassium persulfate 0.01mol, heated in a water bath, after the temperature was raised to 70°C, 0.01mol of acrylamide was added, stirred under a nitrogen atmosphere, and after 50 minutes of reaction, the temperature was raised to 90°C, and stopped after 30 minutes. Suction filtration and drying to obtain grafted modified carbon black.

Embodiment 2

[0023] Weigh 1 mol of methyl acrylate and place it in a three-necked flask, heat it in a water bath, weigh 1 mol of PEG 1000 and place it in a constant pressure funnel, when the water bath is heated to 90°C, add PEG 1000 dropwise in a nitrogen atmosphere, and heat at reflux for 80 minutes After stopping, a large monomer is obtained. Weigh 0.025mol of macromonomer, 0.05mol of acrylic acid in a constant pressure funnel, weigh 5.0g of N330 primary carbon black particles in a three-necked flask, add 80ml of distilled water, ultrasonically disperse for 5min, add maleic anhydride 0.05mol, potassium persulfate 0.01mol, control the temperature of the water bath at 70°C, stir under nitrogen atmosphere, react for 50 minutes, raise the temperature to 90°C, and stop after 30 minutes. Suction filtration and drying to obtain grafted modified carbon black.

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Abstract

The invention discloses a water-based grafting modified carbon black and a preparation method thereof. A comb-like copolymer, which contains one or more of hydrophilic groups such as carboxyl, hydroxyl, sulfo, amido and lactone group, is grafted or bonded on the surface of the carbon black. The modified carbon black is used for a water-based ink for the printing of an ink-jet printer or for a writing tool, a water-based coating and the like, and is low in sedimentation rate without blockage; the particle diameter of the carbon black is not increased and the carbon black can be preserved stably for a long time. The preparation method of the water-based grated modified carbon black is simple, and suitable for either a small-scale test process or industrial production.

Description

technical field [0001] The invention relates to a water-based graft modified carbon black which is used in water-based ink or water-based paint and exhibits excellent dispersibility in water solvents or polar solvents and a preparation method thereof. Background technique [0002] Carbon black is generally used as a colorant for water-based ink for printing black with an inkjet printer, or a colorant for water-based paint. Generally speaking, the raw carbon black powder is an aggregate formed by the aggregation of primary particles, and a secondary aggregate called agglomerate formed by van der Waals force or simple aggregation, adhesion, complexation, etc. Such carbon If the black powder is not treated, it will settle immediately in water due to agglomeration and difficulty in dispersing. Such carbon black particles cannot be used in water-based inks and water-based paints. In order to make the raw carbon black powder easy to disperse in water, the surface of the raw carbo...

Claims

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Application Information

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IPC IPC(8): C08F292/00C09D11/324C09D7/12C09C1/48C09C3/10
Inventor 苏志忠方丽华
Owner SANMING UNIV
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