| abstract |
A polycarbonate polymer wherein the repeating unit is a group represented by general formula (I) and the terminal group is a group represented by formulae (I), (II), (III), (IV) or (V). In formula (I) R¹ and R² represent each halogen, alkyl, cycloalkyl or aryl; a and b represent each independently an integer of 0 to 4; x represents a single bond, -O-, -CO-, -S-, -SO-, -SO₂-, -CR³R⁴-, 1,1-cycloalkylidene or α,ω-alkylene; in formulae (II), (III), (IV) and (V) R⁵ represents C₁-C₃₀ perfluoroalkyl which may be substituted; Y represents -CH₂; n represents and integer of 0 to 6; Z represents -O-, -CO-, -OCO-, -S-, -SO-, -SO₂-or -NHCO-; f represents 0 to 1; R⁶ represents halogen, alkyl, cycloalkyl or aryl; and c and d represent each an interger provided that c + d ≦ 5, c = 1 - 5 and d = 0 - 4. An electrophotographic photoreceptor containing the polycarbonate as one component of the photosensitive layer, which is free from the problem of clouding (gelation) of a coating fluid used for making the same, retains excellent mechanical strengths such a plate wear, and can maintain excellent electrophotographic characteristics, thus being practically excellent. |