Quarternary ammonium sulfate or sulfonate charge control agents for electrophotographic developers compatible with viton fuser

A method of imaging comprising forming a negative electrostatic latent image on a photoreceptor surface, contacting the resulting image with a developer composition comprised of positively charged toner particles and carrier particles, the toner particles being comprised of resin particles, pigment particles, and from about 0.1 to about 10 weight percent based on the weight of the toner particles of an organic sulfate or sulfonate composition of the following formula:

• ##STR6## followed by subsequently transferring the developed latent image to a substrate, and permanently affixing the image thereto, wherein R.sub.1 is analkyl radical containing 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 containing from about 1 carbon atom to about 5 carbon atoms, R.sub.5 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.

A dry electrostatic developer composition comprised of toner particles and carrier particles, the toner particles being comprised of resin particles, and pigment particles, said developer composition further including from about 0.1 to about 10 percent based on the weight of the toner particles of an organic sulfate or sulfonate composition of the following formula:

• ##STR7## wherein R.sub.1 is an alkyl radical containing from about 12 carbon atoms to about 22 carbon atoms, R.sub.2 and R.sub.3 are independently selected from alkyl radicals containing from about 1 carbon atom to about 5 carbon atoms, R.sub.4 is an alkylene group containing from about 1 carbon atom to about 5 carbon atoms, R.sub.5 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.