| 摘要 |
This invention is generally directed to an improved positively charged dry electrostatic toner composition comprised of resin particles, pigment particles, a low molecular weight waxy material having a molecular weight of from 500 to about 20,000, and from about 0.5 percent to about 10 percent by weight of a charge enhancing additive selected from the group consisting of alkyl pyridinium halides, organic sulfonate compositions and organic sulfate compositions, of the following formulas: <IMAGE> I. and <IMAGE> wherein R is a hydrocarbon group containing about 8 to about 22 carbon atoms, and A is an anion, and <IMAGE> II. wherein R1 is an alkyl group containing from about 12 carbon atoms to about 22 carbon atoms, R2 and R3 are independently selected from alkyl groups containing from about 1 carbon atom to about 5 carbon atoms, R4 is an alkylene group containing from about 1 carbon atom to about 5 carbon atoms, R5 is a tolyl group or an alkyl group containing from about 1 carbon atom to about 3 carbon atoms, and n is the number 3 or 4.
|
