摘要:
This invention is directed to positively charged developer compositions and toner compositions, the toner composition being comprised of resin particles, pigment particles, and from about 0.1 to about 10 percent by weight of the toner particles of a polymeric charge enhancing additive selected from the group consisting of those additives of the following formulas: ##STR1## wherein a and b are percentage numbers equaling 100, a being from about 20 weight percent to about 99 weight percent, and b being from about 80 weight percent to about 1 weight percent, n is a repeating number ranging from about 3 to about 300, Z is an oxygen atom, c is the number zero or 1, Y is an alkyl or aromatic radical, Z' is selected from the group consisting of aliphatic, aromatic, and heterocyclic radicals, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from alkyl radicals containing from about 1 to about 22 carbon atoms, X is an anion, a' is a number of from about 50 to about 500, R.sub.1 ' is hydrogen or an alkyl radical containing from 1 to about 22 carbon atoms; as well as methods of developing electrostatographic images utilizing such compositions.
摘要:
Disclosed are positively charged toner compositions comprised of resin particles, pigment particles, and imide charge enhancing additives of the formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3, are alkyl groups containing from 1 carbon atom to about 25 carbon atoms, R.sub.4 is selected from the group consisting of hydrogen, nitro, halogen, amino, and alkyl and A is an anion.
摘要:
Toner compositions comprised of resin particles, pigment particles, and as a charge enhancing additive inner salts wherein the negative charge center is covalently attached to the positive charge center. Also disclosed are developer compositions comprised of the aforementioned toner components and carrier particles, which compositions are particularly useful for the development of the electrostatic latent images. Additionally, there can be selected for the toner and developer compositions mixtures of charge enhancing additives including mixtures of the aforementioned inner salts and second charge enhancing additives such as quaternary ammonium compounds.