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Process for preparing water-soluble graft carbon black

A grafted carbon black and water-soluble technology, which is applied in the treatment of dyed polymer organic compounds and fibrous fillers, can solve the problems of high cost, long process route, and harsh implementation conditions, and achieve the effect of low cost and simple process

Inactive Publication Date: 2004-11-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Since the monomers in the system tend to be more homopolymerized, the grafting rate of the grafted carbon black obtained by the first method usually does not exceed 10%, the grafting efficiency is low, and it is difficult to obtain a satisfactory dispersion effect
The second method has a higher grafting rate, but its process route is longer, and most of the precious metal ions Ce4+ are used, the implementation conditions are harsh, and the cost is high, so it is more common in research papers
The third method is more practical, but it is only suitable for carbon blacks with more oxygen-containing functional groups on the surface (such as channel black), and it is difficult to obtain a satisfactory dispersion effect for carbon blacks with less oxygen-containing functional groups on the surface (such as furnace black) , while furnace black is currently the leading species of carbon black

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A flask equipped with a stirrer, a thermometer, a condenser, and a titration funnel was placed in an ultrasonic field (KWS-Q1018, Shenzhen Keweixin Electromechanical Equipment Co., Ltd.), and 100 parts (by weight, the same below) deionized water, 20 parts of N834 carbon black (Tianjin Dolphin Carbon Black Factory), 20 parts of polyethylene glycol (average molecular weight 10,000, Liaoyang Aoke Chemical Co., Ltd.), 80 parts of hydrogen peroxide (30% aqueous solution), high-speed stirring, the reaction system is ultrasonic Under the action, the temperature was gradually increased, the temperature of the reaction system was controlled to be 60° C., and the reaction was carried out for 5 hours to obtain a carbon black dispersion. There is no need to separate the ungrafted polymer from the system as it acts as a surfactant and binder.

Embodiment 2

[0017] The other conditions are the same as in Example 1, except that 20 parts of polyvinyl alcohol (brand 1792, Anhui Vinylon Factory) is used instead of polyethylene glycol and 10 parts of ammonium persulfate is used instead of hydrogen peroxide.

Embodiment 3

[0019] Except with 20 parts of polyethylene oxide (average molecular weight of 10 7 , Shanghai Liansheng Chemical Co., Ltd.) instead of polyethylene glycol, other conditions are the same as Example 1.

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Abstract

A process for preparing water-soluble grafted carbon black from ordinary carbon black features that the water-soluble polymer (polyglycol, polyvinyl alcohol, or polyoxyethylene) is broken into macromolecular free groups at 20-80 deg.c under co-action of ultrasonic waves (50-500 KHz) and oxidant (persulfate, H2O2, or ozone and its aqueous solution), and said macromolecular free groups are captured by carbon black. Its advantages are simple process, low cost and no pollution.

Description

technical field [0001] The present invention relates to a preparation method of water-soluble grafted carbon black. It belongs to the preparation technology of grafted carbon black. Background technique [0002] Carbon black has excellent colorability, weather resistance and chemical stability, and is an ideal black pigment. However, due to the small primary particle size of carbon black and easy agglomeration, it is difficult to disperse uniformly and stably in the medium. The dispersion of carbon black in the medium seriously affects the quality of its subsequent products (such as coatings and inks). At the same time, as countries around the world pay more and more attention to environmental protection issues, water-based coatings and inks that do not contain or only contain a small amount of organic solvents are becoming more and more popular, and their market share is gradually expanding. Therefore, improving the dispersibility of carbon ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/56C09C3/10
Inventor 姚素微白世河张卫国王宏智
Owner TIANJIN UNIV