| 摘要 |
PROBLEM TO BE SOLVED: To obtain a charge-transfer polyester having high performance, producible easily and useful as an electrophotographic receptor by including respectively specific dicarboxylic acid component and diol component as partial structures. SOLUTION: The objective polyester contains (A) at least one kind of structure expressed by CO-(T)a-A-(T)a-CO as a dicarboxylic acid component and (B) at least one kind of structure expressed by O-(T)b-A'-(T)b-O A and A' are each a bivalent group of formula [R1 to R3 are each H, a halogen, an alkyl or the like; X is a (substituted)bivalent organic group; (a), (b), (k) and (m) are each 0 or 1; T is a 1-10C bivalent hydrocarbon group]} as partial structure of each repeating unit. The above polyester preferably has a weight-average molecular weight of 10,000-300,000.
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