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Method for producing graft carbon black with good water dispersion

A technology of grafted carbon black and a manufacturing method, which is applied in the treatment of dyed polymer organic compounds and fibrous fillers, etc., can solve the problems of low conversion rate of grafted polymers or monomers, and achieve high utilization rate and solvent separation process Simple, less environmental pollution effect

Inactive Publication Date: 2005-03-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Comparing three methods of grafting polymers, the first two methods have the problem of low conversion rate of grafted polymers or monomers

Method used

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  • Method for producing graft carbon black with good water dispersion
  • Method for producing graft carbon black with good water dispersion
  • Method for producing graft carbon black with good water dispersion

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] Example 1: 1g of industrial carbon black product HCF (product of Tianjin Dolphin Carbon Black Co., Ltd.) was dried at 80°C and a vacuum of 15mmHg; in a glass three-necked flask equipped with a reflux condenser, agitator and dropping funnel, add Add dry carbon black to 10ml of 1,4-xylene solution of thionyl chloride with a concentration of 10mol / l, and react at 120°C for 30 minutes under full stirring, then use vacuum distillation to remove the solvent and dichloromethane from the reaction system. Thionyl chloride. Add 10 ml of polyethylene glycol (molecular weight 2000) xylene solution with a concentration of 5 mol / l in the three-necked flask, and react at 120° C. for 300 minutes under stirring; after the reaction, remove the solvent by vacuum distillation. The average particle size of the product is concentrated, and the average particle size is 1×10 -4 mm, excellent dispersion stability after standing for 30 days.

example 2

[0015] Example 2: to add 10ml concentration is that the 1,4-xylene solution of 10mol / l succinoyl dichloride replaces adding 10ml concentration and is the 1,4-xylene solution of the thionyl chloride of 10mol / l, other conditions and Example 1 is the same. The average particle size of the product is concentrated, and the average particle size is 2×10 -4 mm, excellent dispersion stability after standing for 30 days.

example 3

[0016] Example 3: to add 10ml concentration is the 1,4-xylene solution of the thionyl chloride of 10mol / l to replace the 1,4-xylene solution that adds the 1,6-adipyl dichloride that 10ml concentration is 10mol / l, other conditions and Example 1 is the same. The average particle size of the product is concentrated, and the average particle size is 2×10 -4 mm, excellent dispersion stability after standing for 30 days.

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Abstract

The present invention discloses production process of grafted carbon black with good water dispersion. Industrial furnace black and channel black as material are processed through surface activation and grafting with water soluble high molecular compound to produce grafted carbon black product with excellent water dispersivity. The present invention features the surface activation with 1,4-succinic dichloride, 1,6-adipic chloride or sulfoxide dichloride dissolved in methyl benzene, xylene 1,4-dioxane, acetone or butanone in the concentration of 0.01-10 mol / L and at 20-150 deg.c; and grafting reaction with polyglycol, polypropylene glycol or PVA dissolved in methyl benzene, xylene, 1,4-dioxane or dimethyl sulfoxide in the concentration of 1-100 g / L and at 20-150 deg.c.

Description

technical field [0001] The invention relates to a method for preparing grafted carbon black with excellent water dispersibility, which belongs to the preparation technology of grafted carbon black. Background technique [0002] Carbon black has the characteristics of small primary particle size, high surface energy, easy aggregation into larger particles, and difficulty in stably dispersing in polar and non-polar solvents. Grafting polymers or copolymers onto the surface of carbon black for modification is a common and effective method for chemically modifying carbon black. The polymer layer is wrapped on the surface of the carbon black, and due to the interaction between the molecular layers, the carbon black can be stably dispersed in the solvent (water). The polymer chain is combined with the surface of carbon black through chemical bonds, and there is no desorption, which significantly improves the stability of carbon black in solvents. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/48C09C3/10
Inventor 张继炎王道宏任兰正王日杰陈吉祥
Owner TIANJIN UNIV