Poly-N-vinylcarbazole image transport layer plasticized by bis(4-diethylamino-2-methylphenyl)phenylmethane

A flexible recyclable xerographic imaging member consisting essentially of a photoconductive layer comprising an insulating organic resin matrix and a photoconductive material, with substantially all of the photoconductive material in said layer in a multiplicity of interlocking photoconductive continuous paths through the thickness of said layer, said photoconductive paths being present in a volume concentration, based on the volume of said layer, of from about 1 to 25 percent and a contiguous layer of poly(N-vinylcarbazole) having dispersed therein from about 1 to about 25 percent by weight of bis(4-diethylamino-2-methylphenyl)phenylmethane as an electrically active plasticizer for said poly(N-vinylcarbazole), to cause said poly(N-vinylcarbazole) to retain its original flexibility after extensive cycling in a xerographic process while maintaining the capability of supporting the injection and transportation of photo-generated holes, said photoconductive layer exhibiting the capability of photo-generation of holes and injection of said holes and said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photo-generated holes but being capable of supporting the injection of photo-generated holes from said photoconductive layer and transporting said holes through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane.

A flexible recyclable xerographic imaging member consisting essentially of a photoconductive layer comprising an insulating organic resin matrix containing therein photoconductive particles, with substantially all of the photoconductive particles being in substantial particle-to-particle contact in said layer in a multiplicity of interlocking photoconductive paths through the thickness of said layer, said photoconductive paths being present in a volume concentration, based on the volume of said layer, of from about 1 to 25 percent and a contiguous layer of poly(N-vinylcarbazole) having dispersed therein from about 1 to about 25 percent by weight of bis(4diethylamino-2-methylphenyl)phenylmethane as an electrically active plasticizer for said poly(N-vinylcarbazole) to cause said poly(N-vinylcarbazole) to retain its original flexibility after extensive cycling in a xerographic process while maintaining the capability of supporting the injection and transport of photogenerated holes, said photoconductive layer exhibiting the capability of photo-generation of holes and injection of said holes and said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photo-generated holes but being capable of supporting the injection of photo-generated holes from said photoconductive material and transporting said holes through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylpheny)phenylmethane.

A method of imaging which comprises:

• a. providing a flexible recyclable xerographic imaging member consisting essentially of a photoconductive layer of photoconductive material dispersed in a resinous binder and a contiguous layer of electrically active material consisting essentially of poly(N-vinylcarbazole) having dispersed therein from about 1 to about 25 percent by weight of bis(4-diethylamino-2-methylphenyl)phenylmethane as an electrically active plasticizer for said poly(N-vinylcarbazole), to cause said poly(N-vinylcarbazole) to retain its original flexibility after extensive cycling in a xerographic process while maintaining the capability of supporting the injection and transportation of photogenerated holes, said photoconductive layer exhibiting the capability of photo-excited hole generation and injection and said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photo-generated holes but being capable of supporting the injection of photo-generated holes from said photoconductive layers and transporting said holes through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane;
• b. uniformly electrostatically charging said member;
• followed by
• c. imagewise exposing said charged member to a source of activating radiation to which the photoconductive material dispersed in a resinous binder is absorbing and to which the layer of electrically active material is non-absorbing, whereby the photo-generated holes generated by said photoconductive material dispersed in a binder are injected into and are transported through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane to form a latent electrostatic image on the surface of said member.

A method of imaging which comprises:

• a. providing a flexible recyclable xerographic imaging member consisting essentially of a layer of photoconductive material and contiguous layer of poly(N-vinylcarbazole) having dispersed therein from about 1 to about 25 percent by weight of bis(4-diethylamino-2-methylphenyl)phenylmethane as an electrically active plasticizer for said poly(N-vinylcarbazole), to cause said poly(N-vinylcarbazole) to retain its original flexibility after extensive cycling in a xerographic process while maintaining the capability of supporting the injection and transportation of photo-generated holes, said photoconductive material exhibiting the capability of photogeneration of holes and injection of said holes and said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane being substantially non-absorbing in the spectral region at which the photoconductive material generates and injects photo-generated holes but being capable of supporting the injection of photo-generated holes from said photoconductive material and transporting said holes through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane;
• b. uniformly electrostatically charging said member;
• followed by
• c. imagewise exposing said charged member to a source of activating radiation to which the photoconductive material is absorbing and to which the layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane is non-absorbing, whereby the photo-generated holes generated by said photoconductive material are injected into and are transported through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane to form a latent electrostatic image on the surface of said member.

A method of imaging which comprises:

• a. providing a flexible recyclable xerographic imaging member consisting of a photoconductive layer comprising an insulating organic resin matrix and a photoconductive material, with substantially all of the photoconductive material in said layer in a multiplicity of interlocking photoconductive continuous paths through the thickness of said layer, said photoconductive paths being present in a volume concentration, based on the volume of said layer, of from about 1 to 25 percent and a contiguous layer of poly(N-vinylcarbazole) having dispersed therein from about 1 to about 25 percent by weight of bis(4-diethylamino-2-methylphenyl)phenylmethane as an electrically active plasticizer for said poly(N-vinylcarbazole), to cause said poly(N-vinylcarbazole) to retain its original flexibility after extensive cycling in a xerographic process while maintaining the capability of supporting the injection and transportation of photo-generated holes, said photoconductive layer exhibiting the capability of photo-generation of holes and injection of said holes and said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photo-generated holes but being capable of supporting the injection of photo-generated holes from said photoconductive layer and transporting said holes through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane;
• b. uniformly electrostatically charging said member;
• followed by
• c. imagewise exposing said charged member to a source of activating radiation to which the photoconductive material is absorbing and to which the layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane is non-absorbing, whereby the photo-generated holes generated by said photoconductive material are injected into and are transported through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane to form a latent electrostatic image on the surface of the member.

A method of imaging which comprises:

• a. providing a flexible recyclable xerographic imaging member consisting essentially of a photoconductive layer comprising an insulating organic resin matrix containing therein photoconductive particles, with substantially all of the photoconductive particles being in substantial particle-to-particle contact in said layer in a multiplicity of interlocking photoconductive paths through the thickness of said layer, said photoconductive paths being present in a volume concentration, based on the volume of said layer, of from about 1 to 25 percent and a contiguous layer of poly(N-vinylcarbazole) having dispersed therein from about 1 to about 25 percent by weight of bis(4-diethylamino-2-methylphenyl)phenylmethane as an electrically active plasticizer for said poly(N-vinylcarbazole), to cause poly(N-vinylcarbazole) to retain its original flexibility after extensive cycling in a xerographic process while maintaining the capability of supporting the injection and transportation of photo-generated holes, said photoconductive layer exhibiting the capability of photo-generation of holes and injection of said holes and said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photo-generated holes but being capable of supporting the injection of photo-generated holes from said photoconductive material and transporting said holes through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane;
• b. uniformly electrostatically charging said member;
• followed by
• c. imagewise exposing said charged member to a source of activating radiation to which the photoconductive material is absorbing and to which the layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane is non-absorbing, whereby the photo-generated holes generated by said photoconductive material are injected into and are transported through said layer of poly(N-vinylcarbazole) containing bis(4-diethylamino-2-methylphenyl)phenylmethane to form a latent electrostatic image on the surface of the member.