CN102809905A - Method for preparing chemical carbon powder by coagulation on basis of modified latex particles and modified pigment emulsion - Google Patents

Abstract

The invention relates to a method for preparing chemical carbon powder by coagulation on the basis of modified latex particles and modified pigment emulsion. The method includes uniformly dispersing the modified latex particles with sulfonic groups fixed on surfaces, modified pigment particles coated with high polymers, wax dispersion liquid, anionic surfactants and nonionic surfactants in a disperse system at first; then adding flocculating agents into the system to remove stabilization so that the latex particles are coagulated to form micelle, and enabling the pigment particles and wax dispersion particles to coat inside the micelle when the latex particles are coagulated to form the micelle; and finally, performing thermal treatment to obtain chemical carbon powder particles with controllable sizes, approximately spherical shapes and uniform particle diameters.

Description

Method for preparing chemical carbon powder based on modified latex particle and modified pigment emulsion coagulation

technical field

The invention relates to a method for preparing chemical carbon powder based on the coagulation of modified latex particles and modified pigment emulsions. The prepared chemical carbon powder has the characteristics of controllable particle size, narrow particle size distribution, regular shape and the like. The prepared chemical toner particles can be used as toner for laser printers and copiers.

Background technique

Toner for laser printing and copiers is the main consumable in the printing and copying office market, and the market demand is very strong. Laser printing and copiers are mainly based on the principle of magnetoelectricity. The toners used are mainly divided into one-component magnetic toner and two-component non-magnetic toner. The toner for the fixing function is separated, the magnetic carrier medium can be recycled, and it is convenient for the production of toner to color, so it has become the mainstream product in the application field of laser printing and copying toner. The toner for two-component toner is the largest consumable in the printing and copying market. Variety.

Toner for two-component toner can be divided into physical toner and chemical toner according to different production processes. The first-generation toner production process is mainly based on the physical toner produced by the melting pulverization method. The main principle of this production method is to melt and mix pigments, waxes, charge regulators, thermoplastic resins, etc., and then cool to obtain dispersed pigments, waxes and The resin block of the charge regulator, and then use a crushing device to crush the resin block to collect small resin blocks with a size between 5 and 8um, and then add flow aids such as silica particles to make toner. The disadvantages of the traditional melting and pulverizing method for producing toner are obvious. First, the use of grinding equipment will cause high energy consumption and a large amount of dust and noise pollution. Secondly, the melting and pulverizing method is based on the physical pulverization method to produce toner. Waste toner, and the surface is not smooth and there is a section where the pigment and wax particles are exposed on the surface, which will have a negative impact on the printing and copying process. In order to avoid the disadvantages of the above-mentioned toner production process, toner manufacturers in the United States, Japan and other countries have invested heavily in the development of chemical toner. The production methods of chemical toner mainly include suspension polymerization and emulsion coagulation. The new generation of chemical toner produced by suspension polymerization and emulsion coagulation has a smaller particle size and more uniform printing than the physical toner produced by the traditional melting pulverization method. High fineness, smooth surface appearance, good fluidity, more environmentally friendly production process, lower waste powder rate and other advantages, so it has attracted widespread attention. At present, the main production technologies of chemical toner include the suspension polymerization method represented by Canon and the emulsion coagulation method represented by Fuji Xerox and Konica Minolta. Among them, the morphology of the chemical toner prepared by the emulsion coagulation method is ellipsoidal or potato-like, which effectively solves the problem of the toner remaining on the photosensitive drum due to the too round shape of the toner prepared by the suspension method. Difficult problems, and at the same time, the process is easy to adjust and convenient to prepare serial products. This technology is especially suitable for the upgrading of the toner industry pattern in my country, which is dominated by general-purpose toner. The process of chemical toner prepared by emulsion coagulation mainly includes resin (polyester resin, styrene/acrylate resin, etc.) with a mass fraction of 90%~95%, about 5% colorant, 1%~3% The charging agent and some technical additives (such as paraffin, etc.) are dispersed and mixed evenly, and then the mixture of the above particles is aggregated into a small group of the required size through reverse charge or ion flocculation, and finally the temperature of the system is adjusted to the vitrification of the resin Above the transition temperature the resins in the agglomerates are fused to form the final product.

U.S. Patent No. 5,945,245 and U.S. 2008/0113291A1 introduce a method of polycondensation of dimethyl isophthalate-5-sodium sulfonate and linear diol or linear under the catalysis of n-isopropyl aluminum hydroxide. The polyester resin is re-dispersed in water at 100°C to form polymer latex particles with a size of 50-150nm, and after the pigment dispersion and wax dispersion are homogeneously dispersed, the pH of the system is adjusted to acidic, and after adding a polyvalent ion aggregation agent, Adjacent latex particles are pulled closer by particle cross-linking to form aggregates, then the temperature is raised above the glass transition temperature of polyester latex particles to fuse the aggregates, and finally the temperature is lowered, cooled and dried to form toner particles with a size of 5-8um. US patents US 6,120,967 and US2010/0159387A1 describe the method of agglomerating carbon powder particles using acrylate resins under acidic conditions. However, the above-mentioned methods all involve the dispersion of latex particles, pigments, waxes and charge regulator particles, and then use the destabilization of the emulsion system under strong acidic conditions to agglomerate the latex particles. This process will cause disadvantages in two aspects. On the one hand, the pigment, wax and charge regulator dispersion method used in the coagulation preparation of carbon powder under the existing technical conditions are very simple, which may cause the distribution of these components in the toner particles. very ideal. On the other hand, a large amount of emulsifier is used in the dispersion of latex particles, pigments, wax particles, and charge regulator particles in this process, and the addition of coagulant under acidic conditions destroys the effect of emulsifiers and destroys the stability of the emulsion, causing the emulsion to coagulate into small micelles After these small micelles are heat-treated, a large amount of emulsifier remaining in the system will have a negative impact on the printing and copying process and must be removed by washing. The use of a large amount of emulsifier brings greater difficulty to the post-treatment process, and at the same time produces a large amount of waste water. Will cause damage to the environment.

Contents of the invention

technical problem to be solved

In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing chemical carbon powder based on the emulsion coagulation of modified latex particles and modified pigments, which solves the problem of pigment existing in the production process of chemical carbon powder prepared by the existing emulsion coagulation technology , wax and charge regulator particles are not well dispersed in the toner particles, and it is difficult to remove the emulsifier in the later stage.

Technical solutions

A method for preparing chemical carbon powder based on modified latex particles and modified pigment emulsion coagulation, characterized in that the steps are as follows:

Step 1: Mix 0.1-0.5 parts by mass of anionic emulsifier, 0.6 parts by mass of wax and 20 parts by mass of deionized water, and disperse using a dispersing device to prepare an emulsion-like wax dispersion;

Mix 0.1-0.3 parts by mass of anionic emulsifier, 0.2 parts by mass of charge regulator and 10 parts by mass of deionized water, and disperse using a dispersing device to prepare a charge regulator dispersion;

Step 2: Add 30-40 parts by mass of surface sulfonated latex particles, 1.2-1.6 parts by mass of surface polymer-coated and modified pigment particles, non-ionic 0.1-0.5 parts of surfactant and 10 parts of water, and then add the wax dispersion and charge regulator dispersion prepared in step 1, and adjust the pH of the system to 2-4 after mixing;

Step 3: Adjust the temperature of the reaction system to 20~30°C, adjust the stirring speed to 100~500r/min, add 10~20 parts of 10%wt aqueous solution of coagulant to the system dropwise within 10~20 minutes, and then keep warm for 5~ 10min; then raise the temperature of the system to 55~70℃ and keep it warm for 30min;

Step 4: When the coagulation size of the system meets the requirements, add 100 parts of water to the system to terminate the coagulation reaction of the system, and raise the temperature of the system to 90°C within 20-40 minutes for fusion reaction for 4-24 hours to obtain colored chemical toner .

The dispersion method when preparing the wax dispersion in step 1 is: disperse at a temperature higher than the melting point of the wax and then cool to room temperature.

The anionic surfactant is one or more of sodium dodecylsulfonate, sodium dodecylbenzenesulfonate and sodium dodecylsulfate.

The wax is a solid wax with a melting point of 40-70°C.

The solid wax is natural wax, petroleum wax, polyolefin wax or grease-based synthetic wax.

The charge regulator is any commercially available charge regulator on the market.

The pigment particles are carbon black, phthalocyanine blue, magenta pigment or pigment yellow 74 pigment.

The nonionic surfactant is one or more of nonhexylphenol polyoxyethylene ether, polyvinyl alcohol, Span-80 or Tween-85.

The coagulant is inorganic coagulant magnesium chloride, zinc acetate or aluminum trichloride.

The coagulant is polyacrylamide or polyacrylic polymer coagulant.

Beneficial effect

The present invention proposes a method for preparing chemical carbon powder based on modified latex particles and modified pigment emulsion coagulation, using miniemulsion polymerization of styrene, butyl acrylate, and methyl methacrylate as monomers in the presence of reactive emulsifiers The monodisperse polymer nano-latex particles with sulfonic acid groups fixed on the surface were prepared, and the surface of the pigment particles was coated by the soap-free emulsion polymerization method to improve the dispersion of the pigment particles and improve the compatibility between the pigment and the resin. The toner particles are prepared by coagulating the latex particle dispersion, the polymer-coated and modified pigment particle dispersion, the wax particle dispersion, and the charge regulator particle dispersion. This method uses a modified mixed dispersion of resin, pigment, wax particles and charge regulator particles to agglomerate to improve the distribution of pigments, wax particles and charge regulator particles in the carbon powder. At the same time, the used resin and pigment The particles avoid the use of emulsifiers to disperse, which minimizes the difficulty of subsequent treatment processes. The method of the invention can greatly reduce the expected production cost of the chemical carbon powder, simplify the production process and reduce environmental pollution.

Compared with the existing traditional emulsion coagulation technology, the present invention has the advantages of preparing the chemical carbon powder production process under acidic conditions:

1. The method used is based on the emulsion coagulation of modified latex particles and modified pigments, which can improve the dispersion state of additives such as pigments in the prepared toner particles, thereby improving printing quality, improving printing fineness and reducing printing defects.

2. The resin particles used in this method are surface sulfonated styrene-acrylic resin particles, and the sulfonic acid groups are fixed on the surface of the latex particles. At the same time, the resin dispersion can be formed in the preparation process, reducing the amount of emulsifier While using it, it avoids the resin redispersion process in the traditional emulsion coagulation method, and simplifies the production process.

3. The pigment particles used in this method are pigment particles coated with polymers on the surface. The use of polymer coated pigment particles improves the dispersibility of pigment particles and improves the compatibility between pigment particles and resins. It can be expected The effect is to improve the dispersion state of the pigment particles in the resin body of the chemical toner particles, which is beneficial to the improvement of the printing fineness of the toner particles. At the same time, the pigment dispersion process avoids the use of small molecule emulsifiers, reduces the use of emulsifiers in the entire production process, reduces the difficulty of post-processing and reduces environmental pollution.

Description of drawings

Fig. 1 is the projection electron micrograph of the styrene-acrylic ester resin particles of the surface sulfonation used in the present invention, as can be seen from the figure, the styrene-acrylate resin particle diameter of the surface sulfonation used is between 80 ~ About 100nm, good monodispersity.

Fig. 2 has provided the 5 ~ 10um micelle microscopic photograph that resin, pigment, wax, charge regulator mixed dispersion liquid are formed by emulsion coagulation under alkaline conditions, as can be seen from the figure that the method used in the present invention coagulates The size of micelles meets the requirements of chemical toner for laser printers, and the size distribution of micelles is relatively concentrated, which lays a good foundation for subsequent heat treatment to prepare chemical toner with uniform size.

It can be seen from Figure 3 that after the initial heat treatment, the micelles formed by coagulation gradually merged into a whole, forming a potato-like chemical toner particle.

Fig. 1, Fig. 2 and Fig. 3 illustrate that using the preparation process mentioned in the present invention can successfully prepare chemical toner particles.

Detailed ways

Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

Example 1:

Add 0.1 g of sodium dodecylbenzenesulfonate, 0.6 g of carnauba wax, and 20 g of deionized water into a beaker, and disperse the wax into an emulsion by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add 0.1 g of sodium dodecylbenzenesulfonate, 0.2 g of P-15 type charge regulator produced by Hubei Dinglong, and 20 g of deionized water into a beaker, and disperse by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add the above dispersion into a container equipped with an electric stirrer, condensed water, and a thermometer, then add 34g of surface sulfonated latex particle dispersion (resin glass transition temperature is 54°C, surface solid content 20%) and surface polymerization 1.2g of pigment particles coated with modified substances, 0.3g of polyvinyl alcohol, and 10g of water were mixed uniformly and the pH of the system was adjusted to about 2. The temperature of the reaction system was adjusted to 30°C, the stirring speed was adjusted to 500r/min, 10g of a 10%wt aqueous solution of coagulant _MgCl2 was added dropwise to the system within 10 minutes, and then kept warm for 10 minutes, and the temperature of the system was raised to 65°C. Keep warm for 30min. Observe under a microscope that when the aggregation size of the system reaches 5-8um, add 100 parts of water to the system to terminate the aggregation reaction of the system, and raise the temperature of the system to 90°C within 30 minutes for fusion reaction for 6 hours. The obtained toner particles have an average particle size of 6.8um.

Example 2:

Add 0.1 g of sodium dodecyl sulfonate, 0.6 g of carnauba wax, and 20 g of deionized water into a beaker, and disperse the wax into an emulsion by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add 0.1 g of sodium dodecylbenzenesulfonate, 0.2 g of N-33 type charge regulator produced by Hubei Dinglong, and 20 g of deionized water into a beaker, and disperse by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add the above dispersion into a container equipped with an electric stirrer, condensed water, and a thermometer, then add 34g of surface sulfonated latex particle dispersion (resin glass transition temperature is 60°C, surface solid content 20%) and surface polymerization Add 1.2g of modified pigment particles, 0.5g of Span-80, and 10g of water. After mixing evenly, adjust the pH of the system to about 2. The temperature of the reaction system was adjusted to 30°C, the stirring speed was adjusted to 400r/min, and a 10%wt aqueous solution of 10g of coagulant Zn(Ac) ₂ was added dropwise to the system within 10 minutes, and then kept for 5 minutes, and the temperature of the system was raised to 65°C. Incubate at this temperature for 30 minutes. Observe under a microscope that when the aggregation size of the system reaches 5-8um, add 100 parts of water to the system to terminate the aggregation reaction of the system, and raise the temperature of the system to 90°C within 30 minutes for fusion reaction for 6 hours. The obtained toner particles have an average particle size of 7um.

Example 3:

Add 0.2 g of sodium lauryl sulfate, 0.6 g of carnauba wax, and 20 g of deionized water into a beaker, and disperse the wax into an emulsion by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add 0.1 g of sodium dodecylbenzenesulfonate, 0.2 g of P-15 type charge regulator produced by Hubei Dinglong, and 20 g of deionized water into a beaker, and disperse by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add the above dispersion into a container equipped with an electric stirrer, condensed water, and a thermometer, then add 34g of surface sulfonated latex particle dispersion (resin glass transition temperature is 40°C, surface solid content 20%) and surface polymerization Add 1.4g of modified pigment particles, 0.5g of Tween-85, and 10g of water, and adjust the pH of the system to about 2 after mixing evenly. The temperature of the reaction system was adjusted to 30°C, the stirring speed was adjusted to 300r/min, 10g of coagulant MgCl ₂ 10%wt aqueous solution was added dropwise to the system within 10 minutes, and then kept for 10 minutes, the temperature of the system was raised to 50°C, at this temperature Keep warm for 30min. Observe under a microscope that when the aggregation size of the system reaches 5-8um, add 100 parts of water to the system to terminate the aggregation reaction of the system, and raise the temperature of the system to 90°C within 30 minutes for fusion reaction for 4 hours. The obtained carbon powder particles have an average particle size of 5.3um.

Example 4:

Add 0.1 g of sodium lauryl sulfate, 0.6 g of carnauba wax, and 20 g of deionized water into a beaker, and disperse the wax into an emulsion by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add 0.1 g of sodium dodecylbenzenesulfonate, 0.2 g of P-15 type charge regulator produced by Hubei Dinglong, and 20 g of deionized water into a beaker, and disperse by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add the above dispersion into a container equipped with an electric stirrer, condensed water, and a thermometer, then add 34g of surface sulfonated latex particle dispersion (resin glass transition temperature is 54°C, surface solid content 20%) and surface polymerization Add 1.2g of pigment particles coated with modified materials, 0.3g of polyvinyl alcohol, and 10g of water, and adjust the pH of the system to about 3 after mixing evenly. The temperature of the reaction system was adjusted to 40°C, the stirring speed was adjusted to 300r/min, 10g of a 10%wt aqueous solution of coagulant _MgCl2 was added dropwise to the system within 10 minutes, and then kept for 5 minutes, and the temperature of the system was raised to 65°C. Keep warm for 30min. Observe under a microscope that when the aggregation size of the system reaches 5-8um, add 100 parts of water to the system to terminate the aggregation reaction of the system, and raise the temperature of the system to 90°C within 20-40 minutes for fusion reaction for 6 hours. The obtained toner particles have an average particle size of 6.5um.

Example 5:

Add 0.1 g of sodium dodecylbenzenesulfonate, 0.6 g of carnauba wax, and 20 g of deionized water into a beaker, and disperse the wax into an emulsion by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add 0.1 g of sodium dodecylbenzenesulfonate, 0.2 g of N-33 type charge regulator produced by Hubei Dinglong, and 20 g of deionized water into a beaker, and disperse by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add the above dispersion into a container equipped with an electric stirrer, condensed water, and a thermometer, then add 34g of surface sulfonated latex particle dispersion (resin glass transition temperature is 60°C, surface solid content 20%) and surface polymerization Add 1.2g of pigment particles coated with modified materials, 0.4g of polyvinyl alcohol, and 10g of water. After mixing evenly, adjust the pH of the system to about 4. Adjust the temperature of the reaction system to 30°C, adjust the stirring speed to 400r/min, add 10g of a 10%wt aqueous solution of coagulant _MgCl2 dropwise to the system within 10 minutes, and then keep it warm for 10 minutes, and raise the temperature of the system to 65°C. Keep warm for 30min. Observe under a microscope that when the aggregation size of the system reaches 5-8um, add 100 parts of water to the system to terminate the aggregation reaction of the system, and raise the temperature of the system to 90°C within 20-40 minutes for fusion reaction for 6 hours. The average particle diameter of the obtained carbon powder was 8.4um.

Embodiment 6:

Add 0.1 g of sodium dodecylbenzenesulfonate, 0.6 g of carnauba wax, and 20 g of deionized water into a beaker, and disperse the wax into an emulsion by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add 0.1 g of sodium dodecylbenzenesulfonate, 0.2 g of N-33 type charge regulator produced by Hubei Dinglong, and 20 g of deionized water into a beaker, and disperse by ultrasonication for 10 minutes using an ultrasonic cell pulverizer. Add the above dispersion into a container equipped with an electric stirrer, condensed water, and a thermometer, then add 34g of surface sulfonated latex particle dispersion (resin glass transition temperature is 40°C, surface solid content 20%) and surface polymerization Add 1.2g of pigment particles coated with modified materials, 0.3g of polyvinyl alcohol, and 10g of water. After mixing evenly, adjust the pH of the system to about 4. Adjust the temperature of the reaction system to 30°C, adjust the stirring speed to 500r/min, add 10g of a 10%wt aqueous solution of coagulant _AlCl3 dropwise to the system within 10 minutes, then keep it warm for 5-10 minutes, and raise the temperature of the system to 55-70°C , and keep warm for 30 minutes at a certain temperature in this interval. Observe under a microscope that when the aggregation size of the system reaches 5-8um, add 100 parts of water to the system to terminate the aggregation reaction of the system, and raise the temperature of the system to 90°C within 20-40 minutes for fusion reaction for 6 hours. The obtained toner particles have an average particle size of 9.5um.

The wax is any solid wax with a melting point of 40-70°C, for example, one of natural waxes, petroleum waxes, polyolefin waxes, and oil-based synthetic waxes, among which carnauba wax in natural waxes is preferred . The wax dispersion method can use any dispersion method such as ultrasonic pulverizer dispersion, twin-screw extrusion equipment dispersion, high-speed homogeneous emulsifier, etc., disperse at a temperature higher than the melting point of the wax and then cool to room temperature, the particle size of the prepared wax emulsion 100~500nm is better.

The charge regulator can be any commercialized charge regulator, such as the DL series positive and negative charge regulators produced by Hubei Dinglong Chemical Co., Ltd., Japan Hodogaya Chemical Industry Co., Ltd. and Japan Oriental Chemical Industry Co., Ltd. Production of related charge regulator products.

The surface of the surface sulfonated latex particles has sulfonic acid groups fixed on the surface, and its size is 50-800nm. Its preparation method has been described in the patent application number 201210153954.7.

The surface polymer-coated and modified pigment particle is characterized in that the surface of the pigment particle used is covered by a layer of polymerization, so the dispersibility is greatly improved, wherein the pigment can be carbon black, phthalocyanine blue, magenta pigment and pigment Yellow 74 and other pigments, the preparation method of modified pigment particles has been recorded in the application with patent application number 201210132559.0.

Claims (10)

1. one kind prepares the method for chemical carbon powder based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that step is following:

Step 1: 0.1 ~ 0.5 mass parts anionic emulsifier, 0.6 mass parts wax and 20 mass parts deionized waters are mixed, use dispersing apparatus to disperse to be prepared into the wax dispersion of emulsion form;

0.1 ~ 0.3 mass parts anionic emulsifier, 0.2 mass parts charge adjusting agent and 10 mass parts deionized waters are mixed, use dispersing apparatus to disperse to be prepared into the charge adjusting agent dispersion liquid;

Step 2: in the container that electric mixer, condensate water, thermometer are housed; 10 parts in 0.1 ~ 0.5 part of emulsion particle 30 ~ 40 mass parts, pigment particles 1.2 ~ 1.6 mass parts, the non-ionic surfactant after the coating modification of surface aggregate thing of adding sulfonating surface and water; And then add wax dispersion and the charge adjusting agent dispersion liquid that step 1 prepares, mixing back regulation system pH is 2 ~ 4;

Step 3: the conditioned reaction system temperature is 20 ~ 30 ℃, and stirring rate is adjusted to 100 ~ 500r/min, in 10 ~ 20 minutes, in system, drips the WS of the 10%wt of 10 ~ 20 parts of polycoagulant, is incubated 5 ~ 10min then; Then system temperature is increased to 55 ~ 70 ℃ and be incubated 30min;

Step 4: when system cohesion size reaches requirement, in system, add 100 parts of water, the system aggregation is stopped, system temperature is elevated to 90 ℃ carries out fusion reaction and obtained the colorful chemical carbon dust in 4 ~ 24 hours in 20 ~ 40min.

2. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: the process for dispersing during said step 1 preparation wax dispersion is: under the temperature that is higher than the wax fusing point, disperse to be cooled to then room temperature.

3. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said anionic surfactant is one or more in sodium dodecylsulphonate, neopelex, the lauryl sodium sulfate.

4. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said wax is fusing point 40 ~ 70 ℃ solid wax.

5. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: it is any commercial charge adjusting agent on the market that described electric charge is adjusted.

6. prepare the method for chemical carbon powder according to claim 4 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said solid wax is that natural wax, pertroleum wax, polyolefin-wax or grease are synthetic wax.

7. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said pigment particles is carbon black, phthalocyanine blue, magenta pigment or pigment yellow 74 pigment.

8. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said non-ionic surfactant be the ninth of the ten Heavenly Stems own phenol polyethenoxy ether, polyvinyl alcohol (PVA), Span-80 or Tween-85 in one or more.

9. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said polycoagulant is inorganic flocculant magnesium chloride, zinc acetate or aluminium choride.

10. prepare the method for chemical carbon powder according to claim 1 is said based on modified latex grain and modified pigment emulsion coagulation, it is characterized in that: said polycoagulant is polyacrylamide or polyacrylic acid series polymeric flocculant.

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