Patent ID: 8647798

Claim:
A photoreceptor, comprising: an electroconductive substrate; a photosensitive layer overlying the electroconductive substrate; and a protection layer overlying the photosensitive layer, wherein the protection layer comprises: a crosslinked product of a radical polymerizable compound having three or more radical polymerizable groups without a charge transportable group and a compound having formula (1): wherein p, q and r independently represent an integer of from 0 to 2; s and t independently represent an integer of from 0 to 3; R 1 represents a hydrogen atom or a methyl group; R 2 and R 3 independently represent an alkyl group having 1 to 5 carbon atoms wherein plural R 2 may be different from each other when s is 2 or 3 and R 3 may be different from each other when t is 2 or 3; and R 4 represents a single bond, a methylene group, an ethylene group, an ethyleneoxy group, a 2-methylethyleneoxy group or a phenyleneethylene group; and a compound having formula (2): wherein R 5 , R 7 and R 8 independently represent a hydrogen atom, an amino group, an alkoxy group, a thioalkoxy group, an aryloxy group, a methylenedioxy group, an alkyl group optionally having a substituent, a halo group or an aryl group optionally having a substituent; R 6 represents a hydrogen atom, an alkoxy group, an alkyl group optionally having a substituent or a halo group; k, l, m and n independently represent an integer of from 1 to 4wherein plural R 5 may be different from each other when k is an integer of from 2 to 4, plural R 6 may be different from each other when l is an integer of from 2 to 4, plural R 7 may be different from each other when m is an integer of from 2 to 4 and plural R 8 may be different from each other when n is an integer of from 2 to 4.