Positively charged toner compositions
AssigneeXerox Corporation
InventorsRobert J. Gruber, Robert A. Nelson
Life of this patent
Estimating the term…
Abstract
A positively charged toner composition comprised of resin particles exhibiting a peak value molecular weight in each of the molecular weight regions of from about 5,000 to about 80,000, and from about 100,000 to about 2,000,000; a wax component with a weight average molecular weight of from about 500 to about 10,000; and a charge enhancing additive selected from the group consisting of alkyl pyridinium halides, organic sulfonates, organic sulfates, distearyl dimethyl ammonium methyl sulfate, behenyl trimethyl ammonium methyl sulfate, and distearyl methyl ethyl ammonium ethyl sulfate.
Claims31
A positively charged electrostatic toner composition comprised of resin particles exhibiting a peak value weight molecular weight in each of the molecular weight regions of from about 5,000 to about 80,000, and from about 100,000 to about 2,000,000 as determined by gel permeation chromotography, pigment particles;
- a wax component with a weight average molecular weight of from about 500 to about 10,000;
- and a charge enhancing additive selected from the group consisting of alkyl pyridinium halides, organic sulfonate compositions and organic sulfate compositions of the following formulas:
- ##STR3## wherein R is a hydrocarbon group containing from about 8 to about 22 carbon atoms, and A is an anion;
- ##STR4## wherein R.sub.1 is an alkyl group of from about 12 carbon atoms to about 22 carbon atoms, R.sub.2 and R.sub.3 are independently selected from alkyl groups containing from about 1 carbon atom to about 5 carbon atoms, R.sub.4 is an alkylene group of from about 1 carbon atom to about 5 carbon atoms, R.sub.5 is a tolyl group or an alkyl group of from about 1 carbon atom to about 3 carbon atoms, and n is the number 3 or 4;
- distearyl dimethyl ammonium methyl sulfate, behenyl trimethyl ammonium methyl sulfate, and distearyl methyl ethyl ammonium ethyl sulfate.
Dependencies are inferred from the claim text.