Polycarbonate, method of preparing the same and electrophotographic photoreceptor produced by using the same
Patent 5521041 Issued on May 28, 1996. Estimated Expiration Date: 
October 13, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 13, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re27682 3036040 Electrophotographic photoreceptor containing polycarbonate resin as binder resin Patent #: 5213924 InventorsAssigneeApplicationNo. 133126 filed on 10/13/1993US Classes:430/58.45, Additional nitrogen attached indirectly to the hydrazone group by nonionic bonding430/96, Binder for radiation-conductive composition528/202Reactant contains a halogen atom other than solely as halogen bonded to a carbonyl groupExaminersPrimary: Lesmes, George F.Assistant: Codd, Bernard Attorney, Agent or FirmForeign Patent References
International ClassesG03G 015/02G03G 005/00 C08G 064/14 Foreign Application Priority Data1992-03-03 JPAbstractA polycarbonate and a method of preparing the polycarbonate which comprises a repeating unit represented by the following general formula ##STR1## wherein each of R1 and R2 respectively is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, each of a and b is an integer of 0 to 4, and X is a single bond, --O--, --CO--, --S--, --SO--, --SO2 --, --CR3 R4 --, a 1,1-cycloalkylidene group or an ,ω-alkylene group, and end groups represented by the following general formulas ##STR2## wherein, R5 is a perfluoroalkyl group or substituted perfluoroalkyl group of 1 to 30 carbon atoms, Y is --CH2 --, e is an integer of 0 to 6, Z is --O--, --CO--, --OCO--, --S--, --SO--, --SO2 -- or --NHCO--, f is 0 or 1, R6 is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, and each of c and d is an integer satisfying c+dࣘ5, c=1 to 5 and d=0 to 4, and an electrophotographic photoreceptor the photosensitive layer of which contains the polycarbonate of the specific structure as a component. The electrophotographic photoreceptor is produced by using a coating liquid which contains the polycarbonate and does not get cloudy (gel), and is practically useful since it maintains excellent mechanical strength, such as high plate wear, and excellent electrophotographic properties for a long period.Other References
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