An image forming apparatus for forming images on a recording medium comprising:
- a) an imaging member having a charge retentive-surface for receiving an electrostatic latent image thereon, wherein the imaging member comprises
- a flexible substrate,
- a charge generating layer disposed on the substrate,
- at least one charge transport layer disposed on the charge generating layer, and
- an overcoat layer disposed over the at least one charge transport layer, wherein the overcoat layer comprises a blend of a polycarbonate binder and a low surface energy polycarbonate, and further wherein the polycarbonate binder is an A-B diblock copolymer comprising a bisphenol A polycarbonate segment block (A) and a phthalic acid containing segment block (B) terminal capable of providing protection against amine species contaminants, selected from the group consisting of Formula (I) and Formula (ID below:
- wherein z represents the number of bisphenol A repeating units in block A of from about 9 to about 18, y is number of repeating phthalic acid block B of from about 1 to about 2, and n is the degree of polymerization between about 20 and about 80 for the copolymer having a weight average molecular weight between about 100,000 and about 200,000, and mixtures thereof, while the low surface energy polycarbonate is selected from the group consisting of a bisphenol A polycarbonate of poly(4,4′-isopropylidene diphenyl carbonate) modified by including a small fraction of polydimethyl siloxane (PDMS) linkages in the main polycarbonate chain back bone to obtain Formula (1) below:
- wherein x is a number from about 10 to about 50, and f and g are numbers representing each respective repeating segment such that f is from about 1 to about 4 and g is from about 10 to about 100 for a weight average molecular weight of from about 15,000 to about 130,000 of the low surface energy polycarbonate, a bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) modified by including a small fraction of polydimethyl siloxane (PDMS) linkages into the main polycarbonate chain back bone to obtain Formula (2) below:
- wherein x is a number from about 10 and about 50 while f and g are numbers representing each respective repeating units such that f is between about 1 and about 4 and g is from about 10 to about 100 for a weight average molecular weight of from about 15,000 to about 130,000 of the low surface energy polycarbonate, a bisphenol C polycarbonate of poly(4,4′-isopropylidene diphenyl carbonate) modified by including a small fraction of polydimethyl siloxane (PDMS) linkages into the main polycarbonate chain back bone to obtain Formula (3) below:
- wherein x is a number from about 10 and about 50 while f and g are numbers representing the respective repeating units such that f is between about 1 and about 4 and g is from about 10 to about 100 for a weight average molecular weight of from about 15,000 to about 130,000 of the low surface energy polycarbonate, and a bisphenol Z polycarbonate of poly(4,4′-diphenyl-1,1′-cyclohexane carbonate) modified by including a small fraction of polydimethyl siloxane (PDMS) linkages into the main polycarbonate chain back bone to obtain Formula (4) below:
- wherein x is a number from about 10 and about 50 while f and g are numbers representing the respective repeating units such that f is between about 1 and about 4 and g is from about 10 to about 100 for a weight average molecular weight of from about 15,000 to about 130,000 of the low surface energy polycarbonate, and mixtures thereof, and
- an anticurl back coating layer disposed on the flexible substrate on a side opposite the charge generating and charge transport layers;
- b) a development component for applying a developer material to the charge-retentive surface to develop the electrostatic latent image to form a developed image on the charge-retentive surface;
- c) a transfer component for transferring the developed image from the charge-retentive surface to a copy substrate;
- and
- d) a fusing component for fusing the developed image to the copy substrate.