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Toner compositions

A toner and composition technology, applied in the direction of developer, instrument, optics, etc., can solve the problems of excess, total toner loss, waste toner, etc.

Inactive Publication Date: 2006-06-07
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is a high volume of mismarked toner that causes excessive background on the photoreceptor, especially with machines that use contact two-component development
This induced background has low transfer efficiency and causes two fundamental problems: poor image quality due to some background toner being transferred to the media, and poor image quality due to directing most of the untransferred background toner directly to waste. bottle and get excess waste toner
Under the most stringent conditions, up to about 80% of the total toner consumed may be lost to the induction background

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] A latex emulsion designated EP5 comprising polymer particles resulting from the emulsion polymerization of styrene, n-butyl acrylate and β-CEA was prepared as follows. A surfactant solution consisting of about 605 grams of Dowfax 2A1 anionic emulsifier and about 387 kg of deionized water was prepared by mixing in a stainless steel holding tank for about 10 minutes. The storage tank was then purged with nitrogen for about 5 minutes prior to transfer into the reactor. The reactor was then continued to be purged with nitrogen while stirring at about 100 rpm. The reactor was then heated to about 80°C at a controlled rate and held at 80°C for about 2 hrs. Separately, about 6.1 kg of ammonium persulfate initiator was dissolved in about 30.2 kg of deionized water. Monomer emulsions were separately prepared as follows. Mix about 311.4kg styrene, about 95.6kg butyl acrylate, about 12.21kg β-CEA, about 2.88kg 1-dodecanethiol, about 1.42kg ADOD (1,10-decanediol diacrylate), abo...

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PUM

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Abstract

Toner resins include non-crosslinked resins, crosslinked resins or gels, waxes and colorants. The process of preparing the toner comprises mixing a non-crosslinked resin and a crosslinked resin or gel in the presence of waxes, colorants and coagulants to provide toner size aggregates; adding additional non-crosslinked resins to the formed aggregates cross-linking the latex to thereby provide a shell on the formed aggregate; heating the shell-covered aggregate to form the toner; and optionally, separating the toner.

Description

technical field [0001] The present disclosure relates generally to toner compositions and methods, and more particularly to toner compositions and methods, such as an emulsion aggregation toner process for making toner compositions comprising essentially Non-crosslinked resins; crosslinked resins or gels; waxes; and colorants. Background technique [0002] For both black and color prints, small particle size toners are known to improve the image quality of prints. High speed black and white printers require toner particles that can provide a matte finish at low minimum fusing temperature (MFT) in an oil-free fuser system to enable high speed printing and at the same time achieve excellent image quality in the resulting printed product. [0003] Toners containing carbon black or other conductive pigments are known to be prone to inductive charging in high electric fields. The result is a high amount of mismarked toner that causes excessive background on the photoreceptor, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/09G03G9/08
CPCG03G9/0804G03G9/08711G03G9/08791G03G9/08793G03G9/08795G03G9/08797
Inventor R·D·帕特尔D·范贝西恩E·E·阿古尔E·G·兹沃茨M·N·V·麦杜加尔E·L·穆尔P·A·博恩斯K·D·诺塞拉K·周V·斯科罗克霍德W·F·巴什尔S·S·秋
Owner XEROX CORP
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