Photoconductive imaging member with stabilizer in charge transfer layer
AssigneeXerox Corporation
InventorsWilliam W. Limburg, Dale S. Renfer
Life of this patent
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Abstract
An electrophotographic imaging member is disclosed comprising a charge generation layer and a charge transport layer, the transport layer comprising an aromatic amine charge transport molecule in a continuous polymeric binder phase and a chemical stabilizer selected from the group consisting of certain nitrone, isobenzofuran, hydroxyaromatic compounds and mixtures thereof. An electrophotographic imaging process using this member is also described.
Claims9
An electrophotographic imaging member comprising a conductive layer, a charge generation layer and a charge transport layer, said charge transport layer comprising an aromatic amine charge transport molecule in a continuous polymeric binder phase and from about 0.01 percent by weight to about 5 percent by weight based on the total weight of said transport layer of a chemical stabilizer selected from the group consisting of
- I. a nitrone compound having the structural formula ##STR12## wherein R.sub.1 is selected from the group consisting of a substituted and unsubstituted group selected from the group consisting of a phenyl group, a fused ring aromatic group and a heterocyclic group, and R.sub.2 is selected from the group consisting of a substituted and unsubstituted group selected from the group consisting of a linear or branched alkyl group containing 1 to 20 carbon atoms, a phenyl group, a fused ring aromatic group and a heterocyclic group,
- II. an isobenzofuran compound having the structural formula ##STR13## wherein R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are independently selected from the group consisting of substituted and unsubstituted alkyl groups containing 1 to 10 carbon atoms and substituted and unsubstituted phenyl groups,
- III. a hydroxyaromatic compound selected from the group consisting of
- A. fused hydroxyaromatic compounds having the structural formula ##STR14## wherein R.sub.9, R.sub.10, R.sub.11, and R.sub.12 are independently selected from the groupm consisting of hydrogen, a hydroxyl group, a alkoxy group containing 1 to 6 carbon atoms, and an alkyl group containing 1 to 6 carbon atoms, wherein at least one of said R.sub.9, R.sub.10, R.sub.11, and R.sub.12 is a hydroxyl group, and R.sub.13 and R.sub.14 are independently selected from the group consisting of hydrogen, an alkenyl group containing 2 to 40 carbon atoms, and an alkyl group containing 1 to 40 carbon atoms, and
- B. monomeric and polymeric phenolic compounds having the structural formula ##STR15## wherein R.sub.15, R.sub.16, R.sub.17, R.sub.18, and R.sub.19 aare independently selected from the group conssisting of hydrogen, a hydroxyl group, and substituted and unsubstituted groups selected from the group consisting of a linear alkyl group containing 1 to 20 carbon atoms, a branched alkyl group containing 1 to 20 carbon atoms, an alkenyl group containing 1 to 20 carbon atoms, an ester group containing 1 to 20 carbon atoms, a phenyl group, a napthyl group, and
- C. substituted and unsubstituted naphthol compounds, and mixtures thereof.
An electrophotographic imaging process comprising providing an electrophotographic imaging member comprising a conductive layer, a charge generation layer and a charge transport layer, said charge transport layer comprising an aromatic amine charge transport molecule in a continuous polymeric binder phase and from about 0.01 percent by weight to about 5 percent by weight based on the total weight of said transport layer of a chemical stabilizer selected from the group consisting of
- I. a nitrone compound having the structural formula ##STR17## wherein R.sub.1 is selected from the group consisting of a substituted and unsubstituted group selected from the group consisting of a phenyl group, a fused ring aromatic group and a heterocyclic group, and R.sub.2 is selectes from the group consisting of a substituted and unsubstituted group selected from the group consisting of a linear or branched alkyl group containing 1 to 20 carbon atoms, a phenyl group, a fused ring aromatic group and a heterocyclic group,
- II. an isobenzofuran compound having the structural formula ##STR18## wherein R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are independently selected from the group consisting of substituted and unsubstituted alkyl groups containing 1 to 10 carbon atoms and substituted and unsubstituted phenyl groups,
- III. a hydroxyaromatic compound selected from the group consisting of
- A. fused hydroxyaromatic compounds having the structural formula ##STR19## wherein R.sub.9, R.sub.10, R.sub.11, and R.sub.12 are independently selected from the groupm consisting of hydrogen, a hydroxyl group, an alkoxy group containing 1 to 6 carbon atoms, and an alkyl group containing 1 to 6 carbon atoms, wherein at least one of said R.sub.9, R.sub.10, R.sub.11, and R.sub.12 is a hydroxyl group, and R.sub.13 and R.sub.14 are independently selected from the group consisting of hydrogen, an alkenyl group containing 2 to 40 carbon atoms, and an alkyl group containing 1 to 40 carbon atoms, and
- B. monomeric and polymeric phenolic compounds having the structural formula ##STR20## wherein R.sub.15, R.sub.16, R.sub.17, R.sub.18, and R.sub.19 are independently selected from the group conssisting of hydrogen, a hydroxyl group, and substituted and unsubstituted groups selected from the group consisting of a linear alkyl group containing 1 to 20 carbon atoms, a branched alkyl group containing 1 to 20 carbon atoms, an alkenyl group containing 1 to 20 carbon atoms, an ester group containing 1 to 20 carbon atoms, a phenyl group, a napthyl group, an ester group, and an alkoxy group containing 1 to 20 carbon atoms, and
- C. substituted and unsubstituted naphthol compounds, and mixtures thereof, forming an electrostatic latent image on said electrophotographic imaging member, contacting said electrostatic latent image with electrostatically attractable toner particles to form a deposited toner image in image configuration and transfering said toner image to a receiving member.
Dependencies are inferred from the claim text.