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Polymerized toner having high resolution

A toner and pigment technology, applied in the field of polymerized toner, can solve the problems of insignificant charge quantity and poor compatibility of toner.

Inactive Publication Date: 2010-06-09
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between the charge control agent and the toner resin, the charge control agent is non-uniformly distributed on the surface of the toner, and as a result, the increase in the number of charges of the toner is not significant

Method used

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  • Polymerized toner having high resolution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 10 g of colloidal silica as a dispersant and 0.5 g of polyoxyethylene alkylphenyl ether ammonium sulfate (HS-20, Daiichi Kogyo Seiyaku) as a reactive anionic surfactant with reactive functional groups were dissolved in a 500 ml reactor 400g of distilled water. The mixture was heated to a reaction temperature of 70° C. to prepare an aqueous dispersion.

[0044] 160g styrene as a monomer, 36g butyl acrylate and 4g acrylic acid, 4g allyl methacrylate as a polar grafting agent, 0.02g n-dodecyl mercaptan as a molecular weight modifier, and 10g cyanide For cyan pigment, stir in a bead mill at 2,000 rpm for 2 hours. The beads are removed from the monomer / pigment mixture. After heating 105 g of the monomer / pigment mixture to 70° C. in a water bath, 5 g of paraffin wax were added thereto. Stir for 20 minutes to fully dissolve the monomer mixture. 2 g of azobisisobutyronitrile was added to the solution as a polymerization initiator, and stirring was continued for 5 minutes. ...

Embodiment 2

[0047] The toner was prepared in the same manner as in Example 1, except that 0.5 g of potassium alkyl succinate sulfate (ASK, KAO) was used as the reactive anionic surfactant.

Embodiment 3

[0049] The toner was prepared in the same manner as in Example 1 except that 0.5 g of ELEMINOL RS3000 (Sanyo Kasei) was used as a reactive anionic surfactant.

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Abstract

A polymerized toner is provided. The polymerized toner comprises a reactive anionic surfactant having at least one reactive functional group. The reactive anionic surfactant is added simultaneously with a dispersant to prepare an aqueous dispersion or is added within 2 hour after a polymerization reaction of a monomer mixture is initiated in an aqueous dispersion. This simultaneous or rapid addition allows the reactive anionic surfactant to be dispersed on the surface of the toner particles. The reactive anionic surfactant is located over the entire surface of the toner particles to increase the surface charge density of the toner, achieving good charge stability and excellent imaging characteristics.

Description

technical field [0001] The present invention relates to a polymerized toner prepared by suspension polymerization, having good charge stability and excellent imaging properties. More specifically, the present invention relates to a polymeric toner prepared using a reactive anionic surfactant having at least one reactive functional group, wherein the reactive anionic surfactant is distributed over the entire surface of the toner particle to enhance The surface charge density of the toner, so as to obtain good charge stability and excellent imaging characteristics. Background technique [0002] Generally, toner is used for developing electrophotographic images and is used in electrostatic printers, copiers, and the like. Toner refers to a coating substance used to develop an image on a suitable substrate in transit. In recent years, there has been an increasing demand for printing color images using electrophotography-based image forming apparatuses such as multifunction pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/097
CPCG03G9/08G03G9/0806G03G9/08708G03G9/08782G03G9/097
Inventor 朴东镇李昶淳张旭金瑜梛金正祐
Owner LG CHEM LTD
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