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Toner composition containing spacer particles treated with charge control agent

A technology of charge control agent and spacer particles, which is applied in the field of toner, and can solve problems such as increasing problems and reducing printing life

Inactive Publication Date: 2016-08-10
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for many toner compositions, the demand for higher print runs has led to increased problems with embedding of additives into the surface of toner particles, detracting from the goal of longer print life

Method used

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  • Toner composition containing spacer particles treated with charge control agent
  • Toner composition containing spacer particles treated with charge control agent
  • Toner composition containing spacer particles treated with charge control agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] The charge control agent-treated spacer particles are formed as follows. 3% of alkyltrialkoxysilane spacer particles having the following general formula with an average particle size or diameter of 500 nm

[0137]

[0138] Place in a 1% solution of 3,5-di-tert-butyl aluminum salicylate and mix until completely dispersed. The treated spacer particles are dried, for example, by oven, rotary evaporator, freeze dryer or other drying methods. As a result, charge control agent-treated spacer particles containing alkyltrialkoxysilane spacer particles having 3,5-di-t-butylaluminum salicylate charge control agent particles on the surface of the silane particles were obtained.

Embodiment 2

[0140] A toner containing spacer particles treated with a charge control agent is prepared as follows. The particles of Example 1 were predispersed in deionized water containing 1.5% sodium lauryl sulfate surfactant. Emulsion / aggregate particles were first prepared by homogenizing styrene / butyl acrylate resin latex with pigment dispersion, paraffin wax dispersion and polyaluminum chloride (PAC) at about 20-30°C. The mixture is then heated with mixing to a temperature slightly below the Tg of the resin (45-65°C) to grow the particle nuclei to the desired size (4.8-5.8um). Subsequent shell addition and proper particle size (depending on target final particle size) is achieved. 3 / 4 of the shells were added, followed by 1 / 4 of the shells containing the treated spacer particles of Example 1. To prevent further growth of the particles after addition of the shell, sodium hydroxide solution was added and the temperature in the reactor was increased to obtain coalescence. At a circu...

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PUM

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Abstract

The present invention relates to a toner composition containing spacer particles treated with a charge control agent. The toner particles include a shell and a core, wherein the shell includes charge control agent-treated spacer particles that form protrusions from the surface of the toner particle.

Description

technical field [0001] The present invention relates generally to toner methods, and more particularly, to emulsion aggregation and coalescence methods, as well as toner compositions formed by the methods and development methods using the toners. Background technique [0002] Emulsion aggregation / coalescence methods are known for producing toners. [0003] In many electrophotographic machines and methods, a toner image can be applied to a substrate. The toner can then be fused to the substrate by heating the toner using a contact fuser or a non-contact fuser, where the transferred heat fuses the toner mixture to the substrate. However, the quality of the developed image may depend, inter alia, on the nature of the toner composition, the age of the toner (measured in how many print cycles have been completed using the toner composition), and how the toner composition responds to conditions such as temperature Changes in response to changes in operating conditions such as re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/093G03G9/08
CPCG03G9/0819G03G9/0821G03G9/0823G03G9/0825G03G9/09335G03G9/09392G03G9/09741G03G9/08G03G9/097
Inventor M·A·斯维尼R·D·贝利G·E·可米希克-劳里诺维克A·M·斯维尼-琼斯
Owner XEROX CORP
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