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US 8,007,970 B2Granted
Low friction electrostatographic imaging member
AssigneeXerox Corporation
InventorRobert C. U. Yu
Life of this patent
Estimating the term…
Abstract
Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
Claims20
An electrophotographic imaging member comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- a charge transport layer disposed on the charge generating layer, wherein the charge transport layer has at least one layer and further comprises a charge transport compound of aryl diamines or aryl triamines and a low surface energy modified polycarbonate binder having a molecular weight of between about 20,000 and about 200,000, the polycarbonate binder being formed and selected from the group consisting of modified Bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl carbonate) having the following formula (I):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modified Bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) having the following formula (II):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modified Bisphenol C polycarbonate derived from the modification of poly(4,4′-isopropylidene diphenyl carbonate) having the following formula (III):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modification of the modified Bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) having the following formula (IV):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, and mixtures thereof, an ozone suppression agent, and a slip agent;
- and
- an anticurl back coating positioned on a second side of the substrate opposite to the charge generating and the charge transport layers.
6 more elements
An electrophotographic imaging member comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- a charge transport layer disposed on the charge generating layer, wherein the charge transport layer has at least one layer and further comprises a charge transport compound and a binder comprising a blend of a first low surface energy modified polycarbonate binder having a molecular weight of between about 20,000 and about 200,000, the polycarbonate binder being formed and selected from the group consisting of modified Bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl carbonate) having the following formula (I):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modified Bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) having the following formula (II):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units a modified Bisphenol C polycarbonate derived from the modification of poly(4,4′-isopropylidene diphenyl carbonate) having the following formula (III):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modification of the modified Bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) the following formula (IV):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, and mixtures thereof, and a second low surface energy polymer having a molecular weight of between about 20,000 and about 200,000 and a formula selected from the group consisting of formula (VII):
- wherein a, b and p are integers representing the number of repeating units;
- formula (VIII):
- wherein a, b, c, p and q are integers representing the number of repeating units;
- formula (IX):
- wherein the polymer has an polyalkyl and polyaryl siloxane main chain, and wherein a, b and p are integers representing the number of repeating units;
- formula (X):
- wherein a, p and o are integers representing the number of repeating units;
- and formula (XI):
- where a, b and p are integers representing the number of repeating units, and mixtures thereof;
- and
- an anticurl back coating positioned on a second side of the substrate opposite to the charge generating and the charge transport layers.
15 more elements
An image forming apparatus for forming images on a recording medium comprising:
- an imaging member having a charge retentive surface for receiving an electrostatic latent image thereon, wherein the imaging member comprises
- a substrate,
- a charge generating layer disposed on the substrate,
- at least one charge transport layer disposed on the charge generating layer,
- an optional overcoat layer disposed on the charge transport layer, wherein the charge transport layer has at least one layer and further comprises a charge transport compound of aryl diamines or aryl triamines and a low surface energy modified polycarbonate binder having a molecular weight of between about 20,000 and about 200,000, the polycarbonate binder being formed and selected from the group consisting of modified Bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl carbonate) having the following formula (I):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modified Bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) having the following formula (II):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modified Bisphenol C polycarbonate derived from the modification of poly(4,4′-isopropylidene diphenyl carbonate) having the following formula (III):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, a modification of the modified Bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) having the following formula (IV):
- wherein x is an integer between about 40 and about 50 while y and z are positive integers representing a number of the respective repeating units, and mixtures thereof, a polyhedral oligomeric silsequioxane, an ozone suppression agent, and a slip agent;
- and
- an anticurl back coating positioned on a second side of the substrate opposite to the charge generating and the charge transport layers;
- a development component for applying a developer material to the charge-retentive surface;
- a transfer component for applying the developed image from the charge-retentive surface to a copy substrate;
- and
- a fusing component for fusing the developed image to the copy substrate.
12 more elements
Dependencies are inferred from the claim text.