Patent ID: 7803507
Filing Date: 2010-09-28
Classification: G03G

Abstract:
1. An electrophotographic photoreceptor comprising: an electroconductive substrate formed of an electroconductive material; and a photosensitive layer disposed on the electroconductive substrate and containing a polyarylate resin having a structural unit represented by the following general formula (1) and an enamine compound represented by the following general formula (2): in which X 1 represents a single bond or —CR 5 R 6 —; R 5 and R 6 each represents a hydrogen atom, a halogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent; further, R 5 and R 6 may join to each other to form a ring structure; R 1 , R 2 , R 3 , and R 4 each represents a hydrogen atom, a halogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent; and wherein R 7 ˜R 10 means R 7 , R 8 , R 9 , and R 10 and wherein R 7 , R 8 , R 9 , and R 10 each is directly attached to a different carbon atom on the indicated benzene ring not occupied by an ester group, and each represents a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent or an aryl group which may have a substituent in which Ar 1 and Ar 2 each represents an aryl group selected from phenyl, naphthyl, pyrenyl, and anthryl groups which may have a substituent or a heterocyclic group selected from furyl, thienyl, thiazolyl, benzofuryl, benzothiophenyl, benzothiazolyl, and benxoxazolyl groups which may have a substituent; Ar 3 represents an aryl group which may have a substituent, a heterocyclic group which may have a substituent, an aralkyl group which may have a substituent, or an alkyl group which may have a substituent; Ar 4 and Ar 5 each represents a hydrogen atom, an aryl group which may have a substituent, a heterocyclic group which may have a substituent, an aralkyl group which may have a substituent, or an alkyl group which may have a substituent; however, both Ar 4 and Ar 5 do not form the hydrogen atoms; Ar 4 and Ar 5 may join to each other by way of an atom or an atomic group to form a ring structure; “a” represents an alkyl group which may have a substituent, an alkoxy group which may have a substituent, a dialkylamino group which may have a substituent, an aryl group which may have a substituent, a halogen atom or a hydrogen atom, and m represents an integer of 1 to 6; in a case where m is 2 or more, plural a may be identical or different with each other or may join to each other to form a ring structure; R 11 represents a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent; R 12 , R 13 , and R 14 each represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, a heterocyclic group which may have a substituent, or an aralkyl group which may have a substituent; n represents an integer of 1 to 3 and in a case where n is 2 or 3, plural R 12 may be identical or different with each other, and plural R 13 may be identical or different with each other; the substituent which may be present on Ar 1 , Ar 2 , Ar 4 , Ar 5 , a, R 12 , R 13 , and R 14 is selected from an alkyl group, an alkenyl group, an alkoxy group, an amino group, a halogen group, an aryl group, an aryloxy group, and an arylthio group; the substituent which may be present on Ar 3 is selected from an alkyl group, an alkoxy group, an amino group, a halogen group, an aryl group, an aryloxy group, and an arylthio group.