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Porous color matching agent and preparation method thereof

A technology of toner and porous structure, which is applied in the field of electrophotographic toner for printing and copying and its preparation, and can solve the problem that it is difficult to prepare toner particles with porous structure, and the toner with porous structure is sensitive and fragile, and does not have Solve problems such as mechanical processing strength to achieve the effect of increasing page output, reducing fixing temperature and printing consumption, and meeting strength requirements

Active Publication Date: 2015-02-25
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to many property indicators of toner, such as suitable glass transition temperature, crosslinking density and rheology, and sensitive brittleness of porous structure, etc., it is difficult to prepare toner particles with a satisfactory porous structure.
The finite coalescence polymerization method has a high porosity, but the porous structure is too fragile and is brittle in the subsequent processing; the silicone oil-isopropanol extraction technology has a low porosity, and the extraction process is slow and inefficient
[0006] To sum up, the porous structure toner prepared in the prior art is sensitive and fragile, does not have suitable mechanical processing strength, and will be damaged in the subsequent process links. This is the main reason why the existing porous structure toner is not widely used. reason

Method used

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  • Porous color matching agent and preparation method thereof

Examples

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preparation example A1

[0039] In a 250ml beaker, add 1 gram of carboxymethylcellulose, 2 grams of silica sol (50% solid content), 97 grams of deionized water, stir to form a hydroxymethylcellulose-silica sol aqueous solution, which is the first hydrophilic colloid solution. Take another 500ml beaker and add 5 grams of palm wax, 3 grams of carbon black pigment and 92 grams of polymer resin, then add 200 grams of ethyl acetate, heat to 45 ° C in a water bath, stir and dissolve at a speed of 200 rpm, and form an organic phase solution. Use IKA T50 to homogenize the organic phase solution at 4000 rpm, and slowly add the first hydrophilic colloid solution to the organic phase solution, and homogeneously emulsify for 15 minutes to prepare the first water-in-oil suspension. Add 1000 grams of deionized water and 2 grams of silica sol into a 2L beaker, and stir to form a second hydrophilic colloid solution. Use IKA T50 to homogenize the second hydrophilic colloid solution at 2800 rpm, slowly add the first s...

preparation example A2

[0041] In a 250ml beaker, add 10 grams of carboxymethyl cellulose, 10 grams of silica sol (50% solid content), 80 grams of deionized water, and stir to form an aqueous solution of hydroxymethyl cellulose-silica sol, which is the first hydrophilic colloid solution. Take another 500ml beaker and add 13.4 grams of palm wax, 16.7 grams of carbon black pigment and 137 grams of polymer resin, then add 333 grams of ethyl acetate, heat to 45 ° C in a water bath, stir and dissolve at a speed of 200 rpm, and form an organic phase solution. Use IKA T50 to homogenize the organic phase solution at 4000 rpm, and slowly add the first hydrophilic colloid solution to the organic phase solution, and homogeneously emulsify for 15 minutes to prepare the first water-in-oil suspension. Add 1667 grams of deionized water and 33.32 grams of silica sol in a 2L beaker, and stir to form a second hydrophilic colloid solution. Use IKA T50 to homogenize the second hydrophilic colloid solution at 2800 rpm, ...

preparation example A3

[0043] In a 250ml beaker, add 1 gram of carboxymethylcellulose, 10 grams of silica sol (50% solid content), 89 grams of deionized water, stir to form hydroxymethylcellulose-silica sol aqueous solution, which is the first hydrophilic colloid solution. Take another 500ml beaker and add 10.66g of palm wax, 10.66g of carbon black pigment and 111.79g of polymer resin, then add 267g of ethyl acetate, heat it in a water bath to 45°C, stir and dissolve at a speed of 200rpm, and form an organic phase solution. Use IKA T50 to homogenize the organic phase solution at 4000 rpm, and slowly add the first hydrophilic colloid solution to the organic phase solution, and homogeneously emulsify for 15 minutes to prepare the first water-in-oil suspension. Add 1333 grams of deionized water and 6.67 grams of silica sol in a 2L beaker, and stir to form a second hydrophilic colloid solution. Use IKA T50 to homogenize the second hydrophilic colloid solution at 2800 rpm, slowly add the first suspensio...

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Abstract

The invention relates to a porous color matching agent and a preparation method thereof, and solves the problems that the process is complicated, the period is long, and a produced porous color matching agent is poor in mechanical strength in an existing porous color matching agent. Porous color matching agent particles are prepared by adopting a multiple emulsion method. The preparation method comprises the steps of adding a pore generator and a pore supporting article in a first hydrophilic colloid solution, carrying out shear dispersing on the pore generator and the pore supporting article in an organic phase solution to form a water-in-oil type first turbid liquid, then carrying out the shear dispersing on the water-in-oil type first turbid liquid in a second hydrophilic colloid solution to obtain and oil-in-water-water-in-oil type second turbid liquid, and preparing the color matching agent of a porous structure by utilizing a limit polymerization process. The process is simple, the feasibility is high, and the production period is short. The produced porous color matching agent has an excellent porous structure, high-strength abrasion resistance and good mechanical strength, the strength requirement of the subsequent processing flow can be met, the produced color matching agent is unlikely to break, the quality of a printed image can be improved, the photographic fixing temperature and printing consumption of the color matching agent can be reduced, and the printing and copying page yield can be increased.

Description

technical field [0001] The present invention relates to an electrophotographic toner for printing and copying and a preparation method thereof. Background technique [0002] Toner is a key consumable for laser printing and digital copying, mainly composed of resin, pigment, additives, etc. The traditional "melting method" for preparing toners is to melt and mix resins, colorants, charge regulators, release agents, etc., mechanically pulverize, jet pulverize, and classify. Inherent defects such as uniform dispersion in the resin, poor particle size and shape uniformity, and large particle size of the prepared color toner lead to toner sticking to the roller during printing and copying, low resolution, poor color luster, and waste toner rate Higher, unable to meet the increasingly high-standard printing and copying needs. [0003] With chemical means such as the "emulsion polymerization / co-flocculation method" developed by Fuji Xerox, Konica-Minolta and other companies, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08
Inventor 朱双全李清涛
Owner HUBEI DINGLONG CO LTD
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