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Colored carbon power and producing method thereof

A manufacturing method and technology of toner, which is applied in the field of color toner and its preparation, can solve the problems of uneven distribution of pigments, poor copy resolution and color, pollution of carriers and developing sleeves, etc. Good shape uniformity and low powder waste rate

Active Publication Date: 2010-04-28
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the "suspension polymerization method" is that the wide particle size distribution of the toner makes printing and copying resolution and color poor, and the toner particles are too round, which makes it very difficult to recycle and clean the toner remaining on the photoreceptor.
However, when preparing colored carbon powder by emulsion polymerization / co-flocculation method, it is difficult to make resin particles and colored particles uniformly disperse and adhere to each other during mixing, flocculation, and heat treatment of polymer emulsion and colored emulsion; on the other hand, in order to improve the color carbon The anti-offset performance of the toner needs to increase the amount of wax, but at the same time, the wax is easy to migrate to the surface of the toner particles to contaminate the carrier and the developing sleeve, and the pigment is unevenly distributed in the toner, which makes it difficult to improve the quality of printing and copying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0023] Preparation of wax dispersion: 30g of wax (behenyl behenate), 7.5g of sodium lauryl sulfate and 62.5g of water were stirred and dissolved at 90°C, and then the mixture was quickly added to the high-speed dispersant Disperse in the medium, and after 2h of dispersion, a milky white wax dispersion liquid is obtained, and its particle size is 150nm. The particle size is measured by a Beckman Coulter LS230.

[0024] Preparation of anionic wax-containing polymer composite emulsion: 5g sodium lauryl sulfate is dissolved in 100g water, then it is added in the polymerization reactor, and the above-mentioned wax dispersion 25g and 1.4g surface-treated nano-SiO 2 (Degussa R972, particle size 10-14nm) were put into the reaction kettle respectively, and the temperature was raised to 75°C, and then a solution of dissolving 1g of potassium persulfate in 50g of water was added to the reaction kettle, and then 75g of styrene, 22g of butyl acrylate Esters, a mixture of 3g methacrylic ac...

preparation example 2

[0026] Preparation of wax dispersion: same as preparation example 1.

[0027]Preparation of anionic wax-containing polymer composite emulsion: 6g sodium lauryl sulfate is dissolved in 100g water, then it is added in the polymerization reactor, and the above-mentioned wax dispersion 25g and 14g surface-treated nano-SiO 2 (Degussa R974, particle size 10-14nm) were put into the reaction kettle respectively, and the temperature was raised to 75°C, then a solution of dissolving 1g of potassium persulfate in 50g of water was added to the reaction kettle, and then 75g of styrene, 22g of butyl acrylate Esters, 3g of methacrylic acid and 2g of dodecyl mercaptan mixture were gradually added to the reactor within 2 hours, after the addition, the temperature of the system was raised to 80°C, and the reaction was carried out at this temperature for 3 hours, and the obtained anionic wax-containing polymer The particle diameter of the composite emulsion was 225 nm, and this composite emulsio...

preparation example 3

[0029] In Preparation Example 1, in addition to changing dodecyl mercaptan to n-octyl mercaptan, the surface-treated nano-SiO 2 The addition amount was changed to 5g, and other conditions were the same, the particle diameter of the obtained anionic wax-containing polymer composite emulsion was 228nm, and this composite emulsion was called composite emulsion (A-3). Preparation Example 4 of Anionic Waxy Polymer Composite Emulsion

[0030] In Preparation Example 2, except that methacrylic acid was changed to acrylic acid, other conditions were the same, and the particle diameter of the obtained anionic wax-containing polymer composite emulsion was 220nm, and this composite emulsion was called composite emulsion (A-4).

[0031] Preparation Example 1 of Cationic Colorant-containing Polymer Composite Emulsion

[0032] Preparation of colorant dispersion: 30g carbon black (Cabot company) and 7.5g dodecyltrimethylammonium chloride and 62.5g water are stirred and pre-dispersed at room ...

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PUM

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Abstract

The invention discloses a colored carbon power and a producing method thereof to solve the problems of the existing carbon power such as easy stickiness to roller, low resolution ratio and pigment rate, poor color and luster and higher power waste rate during printing and copying. The technical scheme comprises the colored carbon power is formed by agglutinating an anion type wax-containing polymer composite latex (A) and a cation type colorant-containing polymer composite latex (B), wherein the anion type wax-containing polymer composite latex (A) is obtained by polymerizing in-situ latex with wax grains and nano silica as cores, the cation type colorant-containing polymer composite latex (B) is obtained by polymerizing in-situ latex with colorant and nano silica as cores. The inventive is simple in technique, the resolution ratio and pigment rate of printing and copying by the prepared colored carbon power are high, power waste rate is low, and recycling and cleaning of carbon power are easy.

Description

technical field [0001] The invention relates to a color toner used in an electrophotographic duplicating machine and a printer and a manufacturing method thereof, in particular to a color toner with high printing and copying color and resolution, easy recycling and cleaning, and a color toner and its manufacturing method. Preparation. Background technique [0002] Color toner is a key consumable for color laser printing and color digital copying, mainly composed of resin, pigment, additives, etc. The traditional preparation method of color toner is the "melt method", that is, resin (mainly styrene-butyl acrylate copolymer), colorant (pigment or dye), additive (charge regulator, release agent, etc.) , low-temperature mechanical crushing, airflow crushing, classification and other processes to obtain color toner with a particle size of about 10 μm. However, this preparation method has the disadvantages that the colorant is not easy to disperse evenly in the resin, the prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/097
Inventor 解孝林肖桂林黎文部兰泽冠
Owner HUBEI DINGLONG CO LTD
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