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Electric charge regulator used for electrostatic image developing and preparing method thereof

A technology of charge regulator and static electricity, which is applied in the directions of developer, electrography, optics, etc., can solve the problems of poor environmental stability and environmental safety, slow electrification speed of charge regulator, uneven crystal shape and size, etc., to achieve The effect of uniform crystal shape and size, fast electrification speed and mild conditions

Inactive Publication Date: 2007-08-15
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a novel charge regulator for electrostatic image development and its preparation method for electrostatic copying and electrostatic printing, to overcome the slow electrification speed, poor thermal stability and crystallization size of the charge regulator in the prior art. Disadvantages and deficiencies such as unevenness, poor environmental stability and environmental safety

Method used

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  • Electric charge regulator used for electrostatic image developing and preparing method thereof
  • Electric charge regulator used for electrostatic image developing and preparing method thereof
  • Electric charge regulator used for electrostatic image developing and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A new type of charge regulator for electrostatic image development and its preparation method. The polyhydroxy aromatic acid is selected from propyl gallate, the metal ion is selected from trivalent chromium ion, the alcohol is selected from ethylene glycol methyl ether, the mole of chromium ion and propyl gallate The ratio is 1 / 3. Dissolve propyl gallate with ethylene glycol methyl ether, add it to the reaction vessel, and adjust to weak alkalinity; slowly add chromium formate into the reaction vessel while stirring, and use ethylenediamine to keep the pH of the reaction system at 6.0 during the reaction At about 80°C for 3.0 hours; generate a black jelly, filter, treat the black substance with hydrochloric acid to obtain a green powder, wash with deionized water, and dry to obtain a metal Cr(III) complex charge regulator.

[0019] The metal complex charge control agent produced in this embodiment is a green powder with stable performance in the air, no oxidative disco...

Embodiment 2

[0021] A novel charge regulator for developing an electrostatic image and a preparation method thereof. Polyhydroxy aromatic acid is selected from octyl gallate, metal ions are selected from trivalent chromium ions, alcohol is selected from ethanol, and the molar ratio of chromium ion to octyl gallate is 1 / 3. First, make chromium sulfate into a solution with a concentration of 25.0%, and add it to the reaction vessel; dissolve octyl gallate with ethanol, and adjust it to weak alkalinity; slowly add the alcohol solution of octyl gallate dropwise to the prepared mixture while stirring. In the chromium sulfate solution, use sulfuric acid and caustic soda to keep the pH of the reaction system at about 6.5 during the reaction process, pay attention to prevent the formation of hydroxide, and keep it at 60°C for 6.0 hours; a black jelly is formed, which is treated with hydrochloric acid and deionized Washing with water and drying to obtain a metal Cr(III) complex charge regulator.

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Embodiment 3

[0024] A novel charge regulator for electrostatic image development and a preparation method thereof. Polyhydroxy aromatic acid is selected from propyl gallate, metal ions are selected from trivalent chromium ions, and the molar ratio of chromium ion to propyl gallate is 1 / 3. First, make chromium sulfate into a solution with a concentration of 10.0%, and add it to the reaction container; dissolve propyl gallate with distilled water, and adjust it to weak alkalinity with caustic soda; slowly add propyl gallate dropwise to the prepared solution while stirring. In the chromium sulfate solution, prevent generation of hydroxide, keep the pH of the reaction solution at about 5.5 with sulfuric acid and caustic soda during the reaction, and keep the temperature at 30°C for 10.0 hours. After the crystals are precipitated in the solution, they are washed with deionized water and dried to obtain a metal Cr(III) complex charge regulator.

[0025] The metal complex charge control agent pro...

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Abstract

This invention relates to one new static imaging development charge adjust agent and its process method, which comprises the following steps: using secondary stilled water or alcohol liquid to solve polyhydroxy carboxylic acids and its derivant with mole proportion as 1 / 2 to 3 to add the metal ion liquid and polyhydroxy carboxylic acids and its derivant liquid into reaction tar to adjust reaction liquid pH value for heating and mixing under 30 to 80 degrees for 3 to 10 hours to remove the transistor by ion water and drying the super powder to get metal match charge adjust agent. This invention generates metal complex charge adjust agent with stable property without strong wet absorptive situation.

Description

technical field [0001] The invention belongs to the technical field of Charge Control Agent (CCA) for electrostatic development. The invention relates to a novel charge regulator for electrostatic image development and a preparation method thereof, in particular to using a metal complex synthesized by polyhydroxy aromatic acid and its derivatives as a charge controller for toners for electrostatic copying and electrostatic printing. Background technique [0002] The charge regulator for electrostatic image development is the charge control agent of toner for electrostatic copying and electrostatic printing. It can adjust the charge amount of toner and improve the adaptability of toner to the environment. It is indispensable or necessary for electronic development system Material. The charge regulator is also the most important factor affecting the performance of toner, and it is the most value-added product in the toner industry. The charge regulators mainly include nigros...

Claims

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Application Information

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IPC IPC(8): G03G9/097
Inventor 袁昊王伟
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY