Toner composition containing ethylene bisamide compounds
AssigneeNashua Corporation
InventorsJames Boswell, Albert W. LeClair
Life of this patent
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Abstract
A toner composition is disclosed capable of developing electrostatically charged images formed on an electrophotographic member, comprising styrene-based resin particles, pigment particles, a charge-control agent and an ethylenebisamide compound. The toner has superior grinding, lubricating and anti-offset properties.
Claims23
A magnetic toner composition for developing an electrostatic latent image on a photoreceptor, said toner comprising a uniform dispersion comprising:
- a. a polymeric resin;
- b. magnetic particles;
- c. a charge control agent;
- and
- d. an ethylenebisamide compound having the structure:
- ##STR2## wherein R is an alkyl or aryl group said ethylenebisamide compound being present at a concentration of from about 3.0 to about 5.0 percent by weight of the toner composition.
A magnetic toner composition comprising a uniform dispersion comprising:
- a. a resin comprising a styrene homopolymer or styrene-acrylic copolymer
- b. magnetic particles;
- c. a charge control agent;
- and
- d. an ethylenebisamide compound having the structure:
- ##STR3## wherein R is an alkyl or aryl group, said ethylenebisamide compound being present at a concentration of from about 3.0 to about 5.0 percent by weight of the toner composition.
A non-magnetic toner composition for developing an electrostatically charged image on a photoreceptor, said toner comprising a uniform dispersion comprising:
- a. a polymeric resin;
- b. a charge control agent;
- c. a coloring control agent;
- and
- d. an ethylenebisamide compound. having the structure:
- ##STR4## wherein R is an alkyl or aryl group, said ethylenebisamide compound being present at a concentration of from about 3.0 to about 5.0 percent by weight.
A method for improving the lubricity and anti-offset properties of a toner comprising a uniform dispersion said method comprising incorporating into said uniform dispersion a lubricating, anti-offset amount of an ethylenebisamide compound in a polymeric resin, said ethylene bisamide compound having the structure:
- ##STR5## wherein R is an alkyl or aryl group, said ethylenebisamide compound being present at a concentration of from about 3.0 to about 5.0 percent by weight.
A toner composition for developing an electrostatic latent image on a photoreceptor produced by the method comprising the steps of:
- preparing a polymeric resin;
- dry blending a charge control agent, and a ethylenebisamide compound with said polymeric resin into a mixture;
- melt blending said mixture until a uniform dispersion is obtained;
- cooling said dispersion;
- and
- milling said cooled uniform dispersion to form toner particles of a predetermined average size.
Dependencies are inferred from the claim text.