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Method of preparing toner and toner prepared using the method

A technology of toner and polymer glue, which is applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc. It can solve the problem of difficult control of latex particle size, unfavorable surfactant, etc. problems, achieve excellent storability and durability, and reduce production costs

Inactive Publication Date: 2008-01-02
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even when this method is employed, surfactants cause adverse effects, and it is difficult to control the size of latex particles

Method used

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  • Method of preparing toner and toner prepared using the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078]316 g of deionized water and 307 g of latexes A and D [(styrene)-(n-butyl acrylate)-(methacrylate)-(polyethylene glycol-ethyl ether methacrylate) synthesized using the above latex preparation method Esters)] copolymer latex, containing wax, latex A / D ratio = 50 / 50] was added to a 1 L reactor and stirred at 350 rpm. During stirring, 30 g of the black pigment solution dispersed by means of the macromer were added. Adjust the pH of the whole solution to 11 and add 30 g MgCl 2 and gradually heated up to 95°C. After reacting at 95° C. for 2 hours, NaCl was added, and after reacting for 4 hours, the temperature of the mixture was cooled to below the Tg of the polymer latex, and then the toner particles were separated by filtration and dried. The toner particles synthesized in this manner were potato-shaped, and the volume average particle size of the toner particles was about 6.5 μm.

Embodiment 2

[0080] A toner was prepared in the same manner as in Example 1 except that the latex A / D ratio was 80 / 20. The toner particles synthesized in this manner were spherical toner particles with a volume average diameter of about 6.7 μm.

Embodiment 3

[0082] A toner was prepared in the same manner as in Example 1, except that Latex A / B was used instead of Latex A / D, and the ratio thereof was 70 / 30. The toner particles synthesized in this manner were spherical toner particles with a volume average diameter of about 7.0 μm.

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Abstract

A method of preparing toner is provided, including: forming polymer latex particles by polymerizing a toner composition including a macromonomer having a hydrophilic group, a hydrophobic group, and at least one reactive functional group, a polymerizable monomer, a chain transfer agent, and an initiator; aggregating the polymer latex particles; and separating and drying the polymerized toner. The polymerizable monomer is selected to produce at least two groups of polymer latex particles having different molecular weights, wherein the polymer latex particles are selected from the group consisting of a first latex polymer group having a molecular weight less than about 20,000, a second latex polymer group having a molecular weight of about 20,000 to 40,000, a third latex polymer group having a molecular weight of about 40,000 to 50,000, and a fourth latex polymer group having a molecular weight of about 50,000 to 100,000. Also provided are a toner prepared using the method, an image forming method using the toner, and an image forming apparatus employing the toner. Thus, the size and shape of the toner particles can be efficiently adjusted, and a toner having low temperature fixing properties, storability, cleaning properties, and durability can be obtained.

Description

[0001] This application claims priority under 35 U.S.C §119(a) to Korean Patent Application No. 10-2006-0059243 filed with the Korean Intellectual Property Office on Jun. 29, 2006, the disclosure of which is incorporated herein by reference in its entirety. technical field [0002] The present invention relates to a method of producing toner and toner produced by the method. More specifically, the present invention relates to a method for preparing a toner by adjusting the molecular weight of a polymerizable monomer to adjust the size and shape of toner particles. The present invention also relates to a toner prepared using the method, an image forming method using the toner, and an image forming apparatus using the toner. Background technique [0003] In an electrophotographic method or an electrostatic recording method, a developer is used to form an electrostatic image or an electrostatic latent image. The developer may be a two-component developer formed of toner and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G15/00
CPCG03G9/08G03G9/087G03G15/00
Inventor 申曜多洪昌国郑旻泳连卿烈任相淳朴洙范
Owner SAMSUNG ELECTRONICS CO LTD