Positively charged toner compositions containing phosphonium charge enhancing additives
AssigneeXerox Corporation
InventorsRaymond A. Yourd, III, Debesh Majumdar, Robert J. Gruber
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Abstract
Disclosed are improved positively charged toner composition comprised of resin particles, pigment particles, and as a charge enhancing additive a phosphonium compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are selected from the group consisting of alkyl, aryl, substituted alkyl, and substituted aryl, and A is an anion.
Claims35
An improved positively charged toner composition comprised of resin particles, pigment particles, and as a charge enhancing additive in an amount of from about 0.1 percent by weight to about 20 percent by weight a phosphonium compound of the formula:
- ##STR4## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are independently selected from the group consisting of alkyl, aryl, substituted alkyl, and substituted aryl, and A is an anion.
An improved positively charged toner composition comprised of resin particles, pigment particles, and as a charge enhancing additive in an amount of from about 0.1 percent by weight to about 20 percent by weight a phosphonium compound selected from the group consisting of triphenylbutylphosphonium bromide and triphenylbutylphosphonium tetrafluoroborate.
An improved positively charged toner composition consisting essentially of resin particles present in an amount of from about 70 percent by weight to about 90 percent by weight, pigment particles present in an amount of from about 5 percent by weight to about 20 percent by weight, and as a charge enhancing additive present in an amount of from about 0.1 percent by weight to about 20 percent by weight a phosphonium compound of the formula:
- ##STR5## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting of alkyl, aryl, substituted alkyl and substituted aryl, and A is an anion.
Dependencies are inferred from the claim text.