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US 8,026,028 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 slippery polyhedral oligomeric silsequioxane molecules that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
Claims27
An electrophotographic imaging member comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- at least one charge transport layer disposed on the charge generating layer;
- an anticurl back coating positioned on a second side of the substrate opposite to the charge generating and the at least one charge transport layer;
- and
- an optional overcoat layer disposed on the at least one charge transport layer, wherein the at least one charge transport layer, or the optional overcoat layer includes a bisphenol type polycarbonate being selected from the group consisting of a bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl) carbonate having the following formula (A):
- wherein n indicates each respective degree of polymerization, a modified bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl) carbonate having the following formula (B):
- wherein m indicates each respective degree of polymerization, a bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane) carbonate having the following formula (C):
- wherein n indicates each respective degree of polymerization, a modified bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane) carbonate having the following formula (D):
- wherein p indicates each respective degree of polymerization, a phthalate-bisphenol A polycarbonate having the following formula (E):
- wherein w is an integer from about 1 to about 20 and n is the degree of polymerization, and mixtures thereof, an ozone suppression agent, a slip agent, and a slippery polyhedral oligomeric silsequioxane.
8 more elements
An electrophotographic imaging member comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- at least one charge transport layer disposed on the charge generating layer;
- an anticurl back coating positioned on a second side of the substrate opposite to the charge generating and the at least one charge transport layer;
- and
- an optional overcoat layer disposed on at least one the charge transport layer, wherein the charge transport layer and the anticurl back coating include a bisphenol type polycarbonate having a weight average molecular weight of from 20,000 to 200,000 and is being selected from the group consisting of a bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl) carbonate having the following formula (A):
- wherein n indicates each respective degree of polymerization, a modified bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl) carbonate having the following formula (B):
- wherein m indicates each respective degree of polymerization, a bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane) carbonate having the following formula (C):
- wherein n indicates each respective degree of polymerization, a modified bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane) carbonate having the following formula (D):
- wherein p indicates each respective degree of polymerization, a phthalate-bisphenol A polycarbonate having the following formula (E):
- wherein w is an integer from about 1 to about 20 and n is the degree of polymerization, and mixtures thereof, an ozone suppression agent, a slip agent, and a polysiloxane containing slippery polyhedral oligomeric silsequioxane or polytetrafluoroethylene containing slippery polyhedral oligomeric silsequioxane.
8 more elements
An electrophotographic imaging member comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- at least one charge transport layer disposed on the charge generating layer;
- an anticurl back coating positioned on a second side of the substrate opposite to the charge generating and the at least one charge transport layer;
- and
- an optional overcoat layer disposed on the at least one charge transport layer, wherein the anticurl back coating layer includes a bisphenol type polycarbonate being selected from the group consisting of a bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl) carbonate having the following formula (A):
- wherein n indicates each respective degree of polymerization, a modified bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl) carbonate having the following formula (B):
- wherein m indicates each respective degree of polymerization, a bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane) carbonate having the following formula (C):
- wherein n indicates each respective degree of polymerization, a modified bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane) carbonate having the following formula (D):
- wherein p indicates each respective degree of polymerization, a phthalate-bisphenol A polycarbonate having the following formula (E):
- wherein w is an integer from about 1 to about 20 and n is the degree of polymerization, and mixtures thereof, an ozone suppression agent, a slip agent, and a slippery polyhedral oligomeric silsequioxane, wherein the slippery polyhedral oligomeric silsequioxane is poly(dimethyl-co-methylhydrido-co-methylpropyl polyhedral oligomeric silsequioxane)siloxane.
8 more elements
Dependencies are inferred from the claim text.