Composition for forming overcoat layer for organic photoreceptor and organic photoreceptor employing overcoat layer prepared from the composition

An organic photoreceptor comprising:

• a conductive base;
• a photosensitive layer formed on the conductive base;
• and
• an overcoat layer formed on the photosensitive layer and having a product obtained by coating and thermally treating an overcoat layer forming composition comprising an organic silane compound represented by Formula 1, an acrylic polymer, a polyvinyl butyral resin and a solvent:
• 8
• wherein R′ is at least one selected from the group consisting of a C1-C20 alkyl, phenyl, vinyl, methacryloxypropyl, aminopropyl, aminoethylaminopropyl, phenylaminopropyl, chloropropyl, mercaptopropyl, acryloxypropyl, 3-glycidoxypropyl, trifluoropropyl, heptadecafluorodecyl, and isocyanatopropyl group, and R″, which is a hydrolyzable functional group, is a C1-C20 alkoxy group or a halogen atom.

An organic photoreceptor cartridge of an image forming apparatus, the cartridge having an electrophotographic organic photoreceptor with an overcoat layer installed therein, the organic photoreceptor cartridge comprising:

• an electrophotographic organic photoreceptor having an overcoat layer comprising:
• a conductive base;
• a photosensitive layer formed on the conductive base;
• and
• an overcoat layer formed on the photosensitive layer and having a product obtained by coating and thermally treating an overcoat layer forming composition comprising an organic silane compound represented by Formula 1, an acrylic polymer, a polyvinyl butyral resin and a solvent:
• 11
• wherein R′ is at least one selected from the group consisting of a C1-C20 alkyl, phenyl, vinyl, methacryloxypropyl, aminopropyl, aminoethylaminopropyl, phenylaminopropyl, chloropropyl, mercaptopropyl, acryloxypropyl, 3-glycidoxypropyl, trifluoropropyl, heptadecafluorodecyl, and isocyanatopropyl group, and R″, which is a hydrolyzable functional group, is a C1-C20 alkoxy group or a halogen atom;
• and
• at least one of:
• a charging device that charges the electrophotographic organic photoreceptor;
• a developing device that develops an electrostatic latent image formed on the electrophotographic organic photoreceptor;
• and
• a cleaning device which cleans a surface of the electrophotographic organic photoreceptor,
• wherein the organic photoreceptor cartridge is attachable to and detachable from the image forming apparatus.

An organic photoreceptor drum for an image forming apparatus, comprising:

• a drum having an electrophotographic organic photoreceptor installed thereon, wherein the electrophotographic organic photoreceptor comprises:
• an electrophotographic organic photoreceptor having an overcoat layer comprising:
• a conductive base coated on the drum;
• a photosensitive layer formed on the conductive base;
• and
• an overcoat layer formed on the photosensitive layer and having a product obtained by coating and thermally treating an overcoat layer forming composition comprising an organic silane compound represented by Formula 1, an acrylic polymer, a polyvinyl butyral resin and a solvent:
• 12
• wherein R′ is at least one selected from the group consisting of a C1-C20 alkyl, phenyl, vinyl, methacryloxypropyl, aminopropyl, aminoethylaminopropyl, phenylaminopropyl, chloropropyl, mercaptopropyl, acryloxypropyl, 3-glycidoxypropyl, trifluoropropyl, heptadecafluorodecyl, and isocyanatopropyl group, and R″, which is a hydrolyzable functional group, is a C1-C20 alkoxy group or a halogen atom, wherein the drum is attachable to and detachable from the image forming apparatus.

An image forming apparatus comprising:

• a photoreceptor unit comprising an electrophotographic organic photoreceptor having an overcoat layer comprising:
• a conductive base;
• a photosensitive layer formed on the conductive base;
• and
• an overcoat layer formed on the photosensitive layer and having a product obtained by coating and thermally treating an overcoat layer forming composition comprising an organic silane compound represented by Formula 1, an acrylic polymer, a polyvinyl butyral resin and a solvent:
• 13
• wherein R′ is at least one selected from the group consisting of a C1-C20 alkyl, phenyl, vinyl, methacryloxypropyl, aminopropyl, aminoethylaminopropyl, phenylaminopropyl, chloropropyl, mercaptopropyl, acryloxypropyl, 3-glycidoxypropyl, trifluoropropyl, heptadecafluorodecyl, and isocyanatopropyl group, and R″, which is a hydrolyzable functional group, is a C1-C20 alkoxy group or a halogen atom;
• a charging device which charges the photoreceptor;
• an imagewise light irradiating device/developing device which irradiates the charged photoreceptor unit with imagewise light to form an electrostatic latent image on the photoreceptor unit;
• a developing device which develops the electrostatic latent image with a toner to form a toner image on the photoreceptor unit;
• and
• a transfer device which transfers the toner image onto a receiving material.