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| Lithographic printing plate |
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| Toner for developing electrostatic charge image and process for preparing the same |
| An object of the present invention is to provide a toner having a small-particle-size which has ... |
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| Piezo-active photoreceptor and system application |
| The deficiencies discussed above are overcome by the present invention. The charge retentive member ... |
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| Toner for use in developing electrostatic images |
| What we claim is: 1. In a method of electrophotography comprising developing an electrostatic ... |
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| Toner aggregation processes |
| What is claimed is: 1. A process for the preparation of toner compositions comprising: (i) forming ... |
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| Toner |
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| Toner with wax component for developing electrostatic image |
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Toner compositions with halogenated salicylic acid charge enhancing additives
| Details |
Inventors: Law, Kock-Yee; Tarnawskyj, Ihor W.;
Assignee: Xerox Corporation (Stamford, CT)
Primary Examiner: Martin; Roland
Assistant Examiner:
Attorney, Agent or Firm: Palazzo; E. O.
A negatively charged toner composition comprised of resin particles, pigment particles, optional surface additives, and a halogenated salicyclic acid charge enhancing additive of the following formula ##STR1## wherein X is halogen, M is hydrogen, an alkaline earth, an alkali metal, or NR.sub.4 wherein R is alkyl, and n is the number 1 or 2. |
|
DETAILED DESCRIPTION What is claimed is: 1.
A negatively charged toner composition comprised of resin particles, pigment particles, optional surface additives, and a halogenated salicylic acid charge enhancing additive of the following formula ##STR8## wherein X is halogen, M is hydrogen, an alkaline earth, an alkali metal, or NR.
sub.
4 wherein R is alkyl, and n is the number 1 or 2.
2.
A toner composition in accordance with claim 1 wherein M is selected from the group consisting of hydrogen, lithium, sodium, potassium, cesium, magnesium, calcium, barium, or NR.
sub.
4 and R is methyl.
3.
A toner composition in accordance with claim 1 wherein X is iodide or bromide.
4.
A toner composition in accordance with claim 1 wherein the charge additive is present in an amount of from about 0.
01 to about 5 weight percent.
5.
A toner composition in accordance with claim 1 wherein the charge additive is present in an amount of from about 0.
1 to about 3 weight percent.
6.
A toner composition in accordance with claim 1 wherein the charge additive is incorporated into the toner.
7.
A toner composition in accordance with claim 1 wherein the charge additive is present on the surface of the toner composition.
8.
A toner composition in accordance with claim 7 wherein the charge additive is contained on colloidal silica particles, or titanium oxide particles.
9.
A toner composition in accordance with claim 1 wherein the rate of charging of said toner is from about 15 seconds to about 120 seconds by frictional charging against suitable carrier particles.
10.
A toner composition in accordance with claim 1 with a negative triboelectric charge of from between about -10 to about -50 microcoulombs per gram.
11.
A toner composition in accordance with claim 1 wherein the resin particles are selected from the group consisting of styrene acrylates, styrene methacrylates, polyesters, or styrene butadienes.
12.
A toner composition in accordance with claim 1 containing a wax component which has a weight average molecular weight of from about 1,000 to about 6,000
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Molecular Biology 
